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RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ONRIPITAPART.COM
ATOMIC PI ADVENTURES, EPISODE 1: ADDING EXTERNAL PCI The NIC’s usage of the Z8350’s single PCI Express (PCIe) lane is what caught my attention. Unfortunately, the RTL8111G Ethernet chip is soldered to the board, with no easy method to replace it with an external card. A few people have attempted to remove the chip and wire in an external PCIe riser, without success. With my previous experience with fine-pitch electronics work, I figured that KITCHENAID INDUCTION COOKTOP SERVICE MANUAL KitchenAid induction cooktop service manual. Posted on May 27, 2014. by ginbot86. In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TO As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit.ROADMATE 1412
TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412. Magellan units are known to run Windows CE, so naturally I had to purchase it and do what needed to be done: run Doom RESURRECTING A DEAD MACBOOK PRO (MID-2012 13-INCH, MODELSEE MORE ONRIPITAPART.COM
EMMC ADVENTURES, EPISODE 2: RESURRECTING A DEAD INTEL ATOM As seen on Hackaday! Recently, I purchased a cheap Intel Atom-based Windows 8 tablet (the DigiLand DL801W) that was being sold at a very low price ($15 USD, although the shipping to Canada negated much of the savings) because it would not boot into Windows - rather, itBHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface.RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ONRIPITAPART.COM
ATOMIC PI ADVENTURES, EPISODE 1: ADDING EXTERNAL PCI The NIC’s usage of the Z8350’s single PCI Express (PCIe) lane is what caught my attention. Unfortunately, the RTL8111G Ethernet chip is soldered to the board, with no easy method to replace it with an external card. A few people have attempted to remove the chip and wire in an external PCIe riser, without success. With my previous experience with fine-pitch electronics work, I figured that KITCHENAID INDUCTION COOKTOP SERVICE MANUAL KitchenAid induction cooktop service manual. Posted on May 27, 2014. by ginbot86. In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TO As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit.ROADMATE 1412
TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412. Magellan units are known to run Windows CE, so naturally I had to purchase it and do what needed to be done: run Doom RESURRECTING A DEAD MACBOOK PRO (MID-2012 13-INCH, MODELSEE MORE ONRIPITAPART.COM
EMMC ADVENTURES, EPISODE 2: RESURRECTING A DEAD INTEL ATOM As seen on Hackaday! Recently, I purchased a cheap Intel Atom-based Windows 8 tablet (the DigiLand DL801W) that was being sold at a very low price ($15 USD, although the shipping to Canada negated much of the savings) because it would not boot into Windows - rather, itBHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface. WORDADS | RIP IT APART WordAds earnings for 1/3 of November 2017, and all of December 2017. Not too bad – in 1 1/3 months, I’ve earned $20.20 USD in ad revenue. In December alone I earned $15.18 from 17,369 attempted ad impressions; with 9,732 views in December this equates to PERFORMANCE ANALYSIS/REVIEW OF KENTLI PH5 LI-ION 1.5V AA In my previous blog post, I tore down the Kentli PH5 battery – a Li-ion battery that has an internal 1.5-volt regulator that allows for terrific voltage stability up to a point. In terms of data collection, so far I have collected 55+ runs of data logs (248 MB of text files!)and still do
QUICK TUTORIAL: FIXING AUDACITY 2.X PROJECTS NOT OPENING Troubleshooting legacy Audacity .aup projects not opening in Audacity 3 due to invalid XML data. TUTORIAL: RECOVERING COOKIE CLICKER SAVES FROM AN OFFLINE Update (August 29, 2018): Turns out cleaning out your cookies/cache will erase your Cookie Clicker save. Who would've thought Cookie Clicker saves: You don't realize the importance of saving your progress until you lose your save data. A few days ago I opened Chrome to my always-running instances of Cookie Clicker, but found that all TEARDOWN OF KENTLI PH5 1.5 V LI-ION AA BATTERY The end cap’s PCB uses a Xysemi XM5232 2.5 A, 1.5 MHz synchronous buck converter to provide the 1.5 volt output. According to the datasheet, it is a fully integrated converter with all the power semiconductor components residing on the chip itself. The converter is rated for 2.5-5.5 volt operation, well within the range of a Li-ioncell.
LAPTOP BATTERY PINOUT Laptop bottom cover removed and powered by battery. After removing many screws and popping the bottom of the laptop apart, I looked to the battery connector to find out the pinout. Close-up of battery connector. The PCB had an unpopulated spot for some 3-terminal ESD protection diode, and this was a hint that these two pins were what Iwas
HACKING INTO WINDOWS CE (AND DOOM) ON THE MAGELLAN As seen on Hackaday!. Oh no, I’ve done it again haven’t I?. TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412.Magellan units are known to run Windows CE, so naturally I had to purchase it and do what ATOMIC PI AND PFSENSE Atomic Pi and pfSense. Published June 25, 2019 at 2217 × 2792 in Atomic Pi Adventures, Episode 1: Adding external PCI Express expansion by removing onboard Ethernet. Test setup of pfSense using externalPCIe.
BHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface. MAKING USE OF A SCHLUMBERGER REFLEX USB SMART CARD READER For a tutorial on how to install the drivers, click here. A while back a friend of mine gave me an old smart card reader that was of no use to him; he had no need to use smart cards at home and the reader he gave me, a Schlumberger Reflex USB reader, had no support in 64-bitWindows 7, or so it
RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. KITCHENAID INDUCTION COOKTOP SERVICE MANUAL KitchenAid induction cooktop service manual. Posted on May 27, 2014. by ginbot86. In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. QUICK TUTORIAL: FIXING AUDACITY 2.X PROJECTS NOT OPENING Troubleshooting legacy Audacity .aup projects not opening in Audacity 3 due to invalid XML data. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TO As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. PERFORMANCE ANALYSIS/REVIEW OF KENTLI PH5 LI-ION 1.5V AA In my previous blog post, I tore down the Kentli PH5 battery – a Li-ion battery that has an internal 1.5-volt regulator that allows for terrific voltage stability up to a point. In terms of data collection, so far I have collected 55+ runs of data logs (248 MB of text files!)and still do
ROADMATE 1412
TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412. Magellan units are known to run Windows CE, so naturally I had to purchase it and do what needed to be done: run Doom TUTORIAL: RECOVERING COOKIE CLICKER SAVES FROM AN OFFLINE Update (August 29, 2018): Turns out cleaning out your cookies/cache will erase your Cookie Clicker save. Who would've thought Cookie Clicker saves: You don't realize the importance of saving your progress until you lose your save data. A few days ago I opened Chrome to my always-running instances of Cookie Clicker, but found that all TEARDOWN OF KENTLI PH5 1.5 V LI-ION AA BATTERY The end cap’s PCB uses a Xysemi XM5232 2.5 A, 1.5 MHz synchronous buck converter to provide the 1.5 volt output. According to the datasheet, it is a fully integrated converter with all the power semiconductor components residing on the chip itself. The converter is rated for 2.5-5.5 volt operation, well within the range of a Li-ioncell.
BHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface.RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. KITCHENAID INDUCTION COOKTOP SERVICE MANUAL KitchenAid induction cooktop service manual. Posted on May 27, 2014. by ginbot86. In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. QUICK TUTORIAL: FIXING AUDACITY 2.X PROJECTS NOT OPENING Troubleshooting legacy Audacity .aup projects not opening in Audacity 3 due to invalid XML data. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TO As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. PERFORMANCE ANALYSIS/REVIEW OF KENTLI PH5 LI-ION 1.5V AA In my previous blog post, I tore down the Kentli PH5 battery – a Li-ion battery that has an internal 1.5-volt regulator that allows for terrific voltage stability up to a point. In terms of data collection, so far I have collected 55+ runs of data logs (248 MB of text files!)and still do
ROADMATE 1412
TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412. Magellan units are known to run Windows CE, so naturally I had to purchase it and do what needed to be done: run Doom TUTORIAL: RECOVERING COOKIE CLICKER SAVES FROM AN OFFLINE Update (August 29, 2018): Turns out cleaning out your cookies/cache will erase your Cookie Clicker save. Who would've thought Cookie Clicker saves: You don't realize the importance of saving your progress until you lose your save data. A few days ago I opened Chrome to my always-running instances of Cookie Clicker, but found that all TEARDOWN OF KENTLI PH5 1.5 V LI-ION AA BATTERY The end cap’s PCB uses a Xysemi XM5232 2.5 A, 1.5 MHz synchronous buck converter to provide the 1.5 volt output. According to the datasheet, it is a fully integrated converter with all the power semiconductor components residing on the chip itself. The converter is rated for 2.5-5.5 volt operation, well within the range of a Li-ioncell.
BHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface. QUICK TUTORIAL: FIXING AUDACITY 2.X PROJECTS NOT OPENING Troubleshooting legacy Audacity .aup projects not opening in Audacity 3 due to invalid XML data. ATOMIC PI ADVENTURES, EPISODE 1: ADDING EXTERNAL PCI The NIC’s usage of the Z8350’s single PCI Express (PCIe) lane is what caught my attention. Unfortunately, the RTL8111G Ethernet chip is soldered to the board, with no easy method to replace it with an external card. A few people have attempted to remove the chip and wire in an external PCIe riser, without success. With my previous experience with fine-pitch electronics work, I figured that REVERSE-ENGINEERING AND ANALYSIS OF SANDISK HIGH ENDURANCE MicroSD cards often (but not always!) include test pads, used to program/test the NAND Flash during manufacture. These can be exploited in the case of data recovery, or to reuse microSD cards that have a defective controller or firmware by turning the card into a piece of raw NAND Flash – check out Gough Lui’s adventures here.Note that there is no set standard for these test pads (even for TEARDOWN OF KENTLI PH5 1.5 V LI-ION AA BATTERY The end cap’s PCB uses a Xysemi XM5232 2.5 A, 1.5 MHz synchronous buck converter to provide the 1.5 volt output. According to the datasheet, it is a fully integrated converter with all the power semiconductor components residing on the chip itself. The converter is rated for 2.5-5.5 volt operation, well within the range of a Li-ioncell.
TUTORIAL: FIX DYMO LABEL’S FOLDER NAMES AFTER MIGRATING Recently I (finally) migrated my Windows 7-based desktop to Windows 10, and decided to link it to my Microsoft account to gain the convenience of settings synchronization among other benefits. However, not all software was ready for the change Problem: DYMO Label Cannot Find New User Profile Folders DYMO Label v.8 would refuse to load PERFORMING SAFER AC LINE VOLTAGE MEASUREMENTS USING UPDATE (November 19, 2018): Added isolation voltage ratings for the amplifier and DC-DC converter. As seen on Hackaday!. Back in mid-2017 I won a Keysight DSOX1102G digital storage oscilloscope (DSO), a piece of equipment long on my wish list but never acquired until then. One thing I’ve wanted to be able to measure with an oscilloscope for a long time was the waveform of the AC utility HACKING INTO WINDOWS CE (AND DOOM) ON THE MAGELLAN As seen on Hackaday!. Oh no, I’ve done it again haven’t I?. TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412.Magellan units are known to run Windows CE, so naturally I had to purchase it and do what UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
ATOMIC PI AND PFSENSE Atomic Pi and pfSense. Published June 25, 2019 at 2217 × 2792 in Atomic Pi Adventures, Episode 1: Adding external PCI Express expansion by removing onboard Ethernet. Test setup of pfSense using externalPCIe.
BHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface. UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ON RIPITAPART.COMAMAZON SANDISK 64GBSANDISK 64GB MEMORYSANDISK HIGH ENDURANCE 32GBSANDISK HIGH ENDURANCE 256SANDISK HIGH ENDURANCE 64SANDISK HIGH ENDURANCE 64GB REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. QUICK TUTORIAL: FIXING AUDACITY 2.X PROJECTS NOT OPENING Troubleshooting legacy Audacity .aup projects not opening in Audacity 3 due to invalid XML data. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TOCHECK LAPTOP FAN STATUSCPU FAN NOT WORKINGFAN KEEPS RUNNING ON LAPTOPHP LAPTOP FAN RUNS CONSTANTLYQUIET COMPUTER FANSCHECK CPU FAN SPEED As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. IPHONE 5S BATTERY PINOUT The fake battery sports the usual iPhone battery information, complete with some dot-matrix printed data and a data-matrix barcode. It’s labeled with a capacity of 1560 mAh and 3.8 volts nominal voltage. Comparison between real and fake iPhone 5S battery. The connector itself has two points for soldering the connector to providedurability.
KITCHENAID INDUCTION COOKTOP SERVICE MANUAL KitchenAid induction cooktop service manual. Posted on May 27, 2014. by ginbot86. In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here.ROADMATE 1412
TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412. Magellan units are known to run Windows CE, so naturally I had to purchase it and do what needed to be done: run Doom ATOMIC PI AND PFSENSE Atomic Pi and pfSense. Published June 25, 2019 at 2217 × 2792 in Atomic Pi Adventures, Episode 1: Adding external PCI Express expansion by removing onboard Ethernet. Test setup of pfSense using externalPCIe.
BHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface. UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ON RIPITAPART.COMAMAZON SANDISK 64GBSANDISK 64GB MEMORYSANDISK HIGH ENDURANCE 32GBSANDISK HIGH ENDURANCE 256SANDISK HIGH ENDURANCE 64SANDISK HIGH ENDURANCE 64GB REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. QUICK TUTORIAL: FIXING AUDACITY 2.X PROJECTS NOT OPENING Troubleshooting legacy Audacity .aup projects not opening in Audacity 3 due to invalid XML data. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TOCHECK LAPTOP FAN STATUSCPU FAN NOT WORKINGFAN KEEPS RUNNING ON LAPTOPHP LAPTOP FAN RUNS CONSTANTLYQUIET COMPUTER FANSCHECK CPU FAN SPEED As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. IPHONE 5S BATTERY PINOUT The fake battery sports the usual iPhone battery information, complete with some dot-matrix printed data and a data-matrix barcode. It’s labeled with a capacity of 1560 mAh and 3.8 volts nominal voltage. Comparison between real and fake iPhone 5S battery. The connector itself has two points for soldering the connector to providedurability.
KITCHENAID INDUCTION COOKTOP SERVICE MANUAL KitchenAid induction cooktop service manual. Posted on May 27, 2014. by ginbot86. In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here.ROADMATE 1412
TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412. Magellan units are known to run Windows CE, so naturally I had to purchase it and do what needed to be done: run Doom ATOMIC PI AND PFSENSE Atomic Pi and pfSense. Published June 25, 2019 at 2217 × 2792 in Atomic Pi Adventures, Episode 1: Adding external PCI Express expansion by removing onboard Ethernet. Test setup of pfSense using externalPCIe.
BHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface. UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. REVERSE-ENGINEERING AND ANALYSIS OF SANDISK HIGH ENDURANCE MicroSD cards often (but not always!) include test pads, used to program/test the NAND Flash during manufacture. These can be exploited in the case of data recovery, or to reuse microSD cards that have a defective controller or firmware by turning the card into a piece of raw NAND Flash – check out Gough Lui’s adventures here.Note that there is no set standard for these test pads (even for WORDADS | RIP IT APART WordAds earnings for 1/3 of November 2017, and all of December 2017. Not too bad – in 1 1/3 months, I’ve earned $20.20 USD in ad revenue. In December alone I earned $15.18 from 17,369 attempted ad impressions; with 9,732 views in December this equates to ATOMIC PI ADVENTURES, EPISODE 1: ADDING EXTERNAL PCI The NIC’s usage of the Z8350’s single PCI Express (PCIe) lane is what caught my attention. Unfortunately, the RTL8111G Ethernet chip is soldered to the board, with no easy method to replace it with an external card. A few people have attempted to remove the chip and wire in an external PCIe riser, without success. With my previous experience with fine-pitch electronics work, I figured that QUICK TUTORIAL: FIXING AUDACITY 2.X PROJECTS NOT OPENING Troubleshooting legacy Audacity .aup projects not opening in Audacity 3 due to invalid XML data. UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
LAPTOP BATTERY PINOUT Laptop bottom cover removed and powered by battery. After removing many screws and popping the bottom of the laptop apart, I looked to the battery connector to find out the pinout. Close-up of battery connector. The PCB had an unpopulated spot for some 3-terminal ESD protection diode, and this was a hint that these two pins were what Iwas
HACKING INTO WINDOWS CE (AND DOOM) ON THE MAGELLAN As seen on Hackaday!. Oh no, I’ve done it again haven’t I?. TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412.Magellan units are known to run Windows CE, so naturally I had to purchase it and do what TUTORIAL: RECOVERING COOKIE CLICKER SAVES FROM AN OFFLINE Update (August 29, 2018): Turns out cleaning out your cookies/cache will erase your Cookie Clicker save. Who would've thought Cookie Clicker saves: You don't realize the importance of saving your progress until you lose your save data. A few days ago I opened Chrome to my always-running instances of Cookie Clicker, but found that all MAKING USE OF AN OLD TI-83 PLUS LCD SCREEN There are older models that use the Toshiba T6A04. I believe the pinout for the older TI-83s using the T6A04 is different, but the command set is the same. For the ~2004 era of TI-83 Plus calculators, the pinout is as follows: Reset: Active-low input for resetting the LCD screen. RW: Input for parallel interface read/write mode: High =read
RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. WORDADS | RIP IT APART The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ON RIPITAPART.COMAMAZON SANDISK 64GBSANDISK 64GB MEMORYSANDISK HIGH ENDURANCE 32GBSANDISK HIGH ENDURANCE 256SANDISK HIGH ENDURANCE 64SANDISK HIGH ENDURANCE 64GB QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TOCHECK LAPTOP FAN STATUSCPU FAN NOT WORKINGFAN KEEPS RUNNING ON LAPTOPHP LAPTOP FAN RUNS CONSTANTLYQUIET COMPUTER FANSCHECK CPU FAN SPEED As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. KITCHENAID INDUCTION COOKTOP SERVICE MANUAL In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. Since Googling for the cooktop's error/failure codes didn't turn IPHONE 5S BATTERY PINOUT The fake battery sports the usual iPhone battery information, complete with some dot-matrix printed data and a data-matrix barcode. It’slabeled with a
ATOMIC PI AND PFSENSE Test setup of pfSense using external PCIe. In compliance with the GDPR regulations, I need to tell you that my website uses cookies; by continuing to use my website, you agree to this. EMMC ADVENTURES, EPISODE 2: RESURRECTING A DEAD INTEL ATOM As seen on Hackaday! Recently, I purchased a cheap Intel Atom-based Windows 8 tablet (the DigiLand DL801W) that was being sold at a very low price ($15 USD, although the shipping to Canada negated much of the savings) because it would not boot into Windows - rather, it UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. WORDADS | RIP IT APART The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ON RIPITAPART.COMAMAZON SANDISK 64GBSANDISK 64GB MEMORYSANDISK HIGH ENDURANCE 32GBSANDISK HIGH ENDURANCE 256SANDISK HIGH ENDURANCE 64SANDISK HIGH ENDURANCE 64GB QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TOCHECK LAPTOP FAN STATUSCPU FAN NOT WORKINGFAN KEEPS RUNNING ON LAPTOPHP LAPTOP FAN RUNS CONSTANTLYQUIET COMPUTER FANSCHECK CPU FAN SPEED As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. KITCHENAID INDUCTION COOKTOP SERVICE MANUAL In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. Since Googling for the cooktop's error/failure codes didn't turn IPHONE 5S BATTERY PINOUT The fake battery sports the usual iPhone battery information, complete with some dot-matrix printed data and a data-matrix barcode. It’slabeled with a
ATOMIC PI AND PFSENSE Test setup of pfSense using external PCIe. In compliance with the GDPR regulations, I need to tell you that my website uses cookies; by continuing to use my website, you agree to this. EMMC ADVENTURES, EPISODE 2: RESURRECTING A DEAD INTEL ATOM As seen on Hackaday! Recently, I purchased a cheap Intel Atom-based Windows 8 tablet (the DigiLand DL801W) that was being sold at a very low price ($15 USD, although the shipping to Canada negated much of the savings) because it would not boot into Windows - rather, it UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
WORDADS | RIP IT APART The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TO As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. REVERSE-ENGINEERING AND ANALYSIS OF SANDISK HIGH ENDURANCE MicroSD cards often (but not always!) include test pads, used to program/test the NAND Flash during manufacture. These can be exploited in the case of data recovery, or to reuse microSD cards that have a defective controller or firmware by turning the card into a piece of raw NAND Flash – check out Gough Lui’s adventures here.Note that there is no set standard for these test pads (even for ATOMIC PI ADVENTURES, EPISODE 1: ADDING EXTERNAL PCI The NIC’s usage of the Z8350’s single PCI Express (PCIe) lane is what caught my attention. Unfortunately, the RTL8111G Ethernet chip is soldered to the board, with no easy method to replace it with an external card. A few people have attempted to remove the chip and wire in an external PCIe riser, without success. With my previous experience with fine-pitch electronics work, I figured that TEARDOWN OF KENTLI PH5 1.5 V LI-ION AA BATTERY June 17, 2015 - Performance analysis/review HERE! After having an entire month of dormancy on this blog, I'm finally beginning to cross off the blog posts on my "Pending" list. Last year, I made a blog post talking about Kentli's lithium-ion based AA battery that has an internal 1.5 volt regulator. The first order neverREVERSE ENGINEERING
As seen on Hackaday!. TL;DR – If you have a ZTE WF721 that’s PIN-locked your SIM card, try 2376. Recently I picked up a used Samsung Galaxy Core LTE smartphone from a relative after they upgraded to an iPhone. As the Core LTE is a low-end smartphone, I suspected that the phone was SIM locked to its original carrier (Virgin Mobile), but in order to test this I needed a different SIM card. BQ27541 | RIP IT APART It’s been a while since I’ve posted about the Kentli PH5 battery, which is a Li-ion cell with an integrated 1.5-volt regulator, wrapped up in an AA-sized package.Although I haven’t written much about its performance yet, that doesn’t mean I haven’t been doing work onit.
TUTORIAL: RECOVERING COOKIE CLICKER SAVES FROM AN OFFLINE Update (August 29, 2018): Turns out cleaning out your cookies/cache will erase your Cookie Clicker save. Who would've thought Cookie Clicker saves: You don't realize the importance of saving your progress until you lose your save data. A few days ago I opened Chrome to my always-running instances of Cookie Clicker, but found that allROADMATE 1412
As seen on Hackaday!. Oh no, I’ve done it again haven’t I?. TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412.Magellan units are known to run Windows CE, so naturally I had to purchase it and do whatBHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface.RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. WORDADS | RIP IT APART The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ON RIPITAPART.COMAMAZON SANDISK 64GBSANDISK 64GB MEMORYSANDISK HIGH ENDURANCE 32GBSANDISK HIGH ENDURANCE 256SANDISK HIGH ENDURANCE 64SANDISK HIGH ENDURANCE 64GB QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TOCHECK LAPTOP FAN STATUSCPU FAN NOT WORKINGFAN KEEPS RUNNING ON LAPTOPHP LAPTOP FAN RUNS CONSTANTLYQUIET COMPUTER FANSCHECK CPU FAN SPEED As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. KITCHENAID INDUCTION COOKTOP SERVICE MANUAL In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. Since Googling for the cooktop's error/failure codes didn't turn IPHONE 5S BATTERY PINOUT The fake battery sports the usual iPhone battery information, complete with some dot-matrix printed data and a data-matrix barcode. It’slabeled with a
ATOMIC PI AND PFSENSE Test setup of pfSense using external PCIe. In compliance with the GDPR regulations, I need to tell you that my website uses cookies; by continuing to use my website, you agree to this. EMMC ADVENTURES, EPISODE 2: RESURRECTING A DEAD INTEL ATOM As seen on Hackaday! Recently, I purchased a cheap Intel Atom-based Windows 8 tablet (the DigiLand DL801W) that was being sold at a very low price ($15 USD, although the shipping to Canada negated much of the savings) because it would not boot into Windows - rather, it UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
RIP IT APART
The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. WORDADS | RIP IT APART The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. REVIEW, TEARDOWN AND ANALYSIS OF CHARGING ESSENTIALS USB The converter seems relatively well-built (at least relative to some crap Chinese power supplies out there).Some thought was put into the safe operation of this device, but there’s almost no isolation between the high and low voltage sides, and the DC side of this adapter is not grounded; the “ground” for the USB ports floats at 60 volts AC with respect to the mains earth pin. UNBOXING AND REVIEW OF SANDISK 64GB MICROSDXC HIGHSEE MORE ON RIPITAPART.COMAMAZON SANDISK 64GBSANDISK 64GB MEMORYSANDISK HIGH ENDURANCE 32GBSANDISK HIGH ENDURANCE 256SANDISK HIGH ENDURANCE 64SANDISK HIGH ENDURANCE 64GB QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TOCHECK LAPTOP FAN STATUSCPU FAN NOT WORKINGFAN KEEPS RUNNING ON LAPTOPHP LAPTOP FAN RUNS CONSTANTLYQUIET COMPUTER FANSCHECK CPU FAN SPEED As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. KITCHENAID INDUCTION COOKTOP SERVICE MANUAL In preparation for a future post in which I do some failure analysis on my KitchenAid KICU509XBL induction cooktop, I dug up the service manual I had laying in one of my document drawers and have scanned it into a PDF. Download the PDF file here. Since Googling for the cooktop's error/failure codes didn't turn IPHONE 5S BATTERY PINOUT The fake battery sports the usual iPhone battery information, complete with some dot-matrix printed data and a data-matrix barcode. It’slabeled with a
ATOMIC PI AND PFSENSE Test setup of pfSense using external PCIe. In compliance with the GDPR regulations, I need to tell you that my website uses cookies; by continuing to use my website, you agree to this. EMMC ADVENTURES, EPISODE 2: RESURRECTING A DEAD INTEL ATOM As seen on Hackaday! Recently, I purchased a cheap Intel Atom-based Windows 8 tablet (the DigiLand DL801W) that was being sold at a very low price ($15 USD, although the shipping to Canada negated much of the savings) because it would not boot into Windows - rather, it UPDATE: HOW TO INSTALL WINDOWS X64 DRIVERS FOR THE Update (December 11, 2017): For those on Windows 10, click HERE for the SCR300 driver package - digitally signed to ensure compatibility. Extract the files, right-click the appropriate x86/x64 .INF file and select "Install". Proceed with the installation as shown below. A viewer requested help on installing the drivers for the SchlumbergerReflex USB smart
WORDADS | RIP IT APART The one post that did make it out of the Drafts folder this year was my adventure in reverse-engineering a SanDisk high-endurance memory card in order to see what specific kind of NAND Flash was being used, earning over 7,500 views this year; these views primarily came from Hackaday, Twitter and Reddit.. The other posts are classics that people still love to read about. QUICK HACK: CONVERTING A COMPUTER FAN FROM THERMOSTATIC TO As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal.This is especially convenient as this means I don’t need to invert the logic signal before feeding it to the N-channel MOSFET controlling the thermistor input circuit. REVERSE-ENGINEERING AND ANALYSIS OF SANDISK HIGH ENDURANCE MicroSD cards often (but not always!) include test pads, used to program/test the NAND Flash during manufacture. These can be exploited in the case of data recovery, or to reuse microSD cards that have a defective controller or firmware by turning the card into a piece of raw NAND Flash – check out Gough Lui’s adventures here.Note that there is no set standard for these test pads (even for ATOMIC PI ADVENTURES, EPISODE 1: ADDING EXTERNAL PCI The NIC’s usage of the Z8350’s single PCI Express (PCIe) lane is what caught my attention. Unfortunately, the RTL8111G Ethernet chip is soldered to the board, with no easy method to replace it with an external card. A few people have attempted to remove the chip and wire in an external PCIe riser, without success. With my previous experience with fine-pitch electronics work, I figured that TEARDOWN OF KENTLI PH5 1.5 V LI-ION AA BATTERY June 17, 2015 - Performance analysis/review HERE! After having an entire month of dormancy on this blog, I'm finally beginning to cross off the blog posts on my "Pending" list. Last year, I made a blog post talking about Kentli's lithium-ion based AA battery that has an internal 1.5 volt regulator. The first order neverREVERSE ENGINEERING
As seen on Hackaday!. TL;DR – If you have a ZTE WF721 that’s PIN-locked your SIM card, try 2376. Recently I picked up a used Samsung Galaxy Core LTE smartphone from a relative after they upgraded to an iPhone. As the Core LTE is a low-end smartphone, I suspected that the phone was SIM locked to its original carrier (Virgin Mobile), but in order to test this I needed a different SIM card. BQ27541 | RIP IT APART It’s been a while since I’ve posted about the Kentli PH5 battery, which is a Li-ion cell with an integrated 1.5-volt regulator, wrapped up in an AA-sized package.Although I haven’t written much about its performance yet, that doesn’t mean I haven’t been doing work onit.
TUTORIAL: RECOVERING COOKIE CLICKER SAVES FROM AN OFFLINE Update (August 29, 2018): Turns out cleaning out your cookies/cache will erase your Cookie Clicker save. Who would've thought Cookie Clicker saves: You don't realize the importance of saving your progress until you lose your save data. A few days ago I opened Chrome to my always-running instances of Cookie Clicker, but found that allROADMATE 1412
As seen on Hackaday!. Oh no, I’ve done it again haven’t I?. TL;DR: Just because a device runs Windows CE doesn’t mean it’ll just run Doom without much work. About a week ago I was perusing some local garage sales, and stumbled upon an old GPS receiver – the Magellan RoadMate 1412.Magellan units are known to run Windows CE, so naturally I had to purchase it and do whatBHT WR202HH032G
The BayHub OZ788WR2 Bridge Chip. These eMMC-based SSDs use a curious little chip, the BayHub OZ788WR2 (labeled 788WR2A on the chip itself). It is an SD/MMC-to-SATA adapter, with an SD UHS-II/MMCplus HS200 device interface and SATA II 3Gbps host interface.Advertisements
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Memory cards, like other block-based storage media, often define capacities with decimal prefixes, whereas computers usually binary. A “64-gigabyte” card is really 59.605 binary gigabytes (“gibibytes“)
in capacity, but in this blog post I’m using the Windows notation of gigabytes; that is, calculating in binary but displaying as decimal. Therefore, we get a final calculated P/E (program-erase) cycle count of… 936 CYCLES. This is more in line with traditional 2D TLC NAND Flash, so I suspect that this rating is either based on different bitrates, or SanDisk is being really, really conservative in their estimates – or heck, maybe this really is just TLC NAND Flash that’s being configured and/or warrantied differently by SanDisk. As much as I am tempted to remove the epoxy coating that covers the manufacturing test pads in order to get a NAND Flash signature directly, I like having a warranty for at least a few years. Maybe I’ll buy another card to try this on…CARD INFORMATION
Using an older laptop with a true SD-compliant slot (most newer ones are just USB card readers internally), I was able to grab the card’s metadata from Linux. These information files are found in /sys/block/mmcblk_X_/device, where _X_ is usually 0 depending on your host machine. Android used to be able to do this as well, but nowadays it’s not possible without a rooted operating system.ITEM
VALUE
CID (Card ID)
035744534836344780ed1bbb9e013100 CSD (Card Specific Data) 400e0032db790001dbd37f800a404000Manufacturer ID
0x03 (SanDisk)
Manufacture Date
January 2019
Device Name
SH64G
Firmware Version
0x0
Hardware Revision
0x8
INITIAL FORMATTING
The card is formatted as exFAT, with a 16 MB offset (that is, the first 16 MB of the card is unallocated), with an allocation unit size of 128 kilobytes. It uses a very basic MBR (Master Boot Record) partition structure, with the first sector being the bare minimum to be recognized as a valid structure.*
The card’s file system properties in Windows.*
The card’s partition structure in Hard Disk Sentinel.*
The card’s MBR.
PERFORMANCE
Now that I’ve probably irked some of my readers with my usage of decimal and binary prefixes, it’s time to see how fast this card can go. SanDisk’s own ratings for the card are very brief, citing a sequential read/write speed of 100 and 40 MB/s respectively. It is rated for the V30 Video speed classification,
which guarantees a minimum of 30 MB/s sequential writes continuously. All the tests below were performed on my desktop computer using a FCR-HS4 USB 3.0 reader from Kingston, which is based on the RealtekRTS5321 chipset.
CRYSTALDISKMARK
CrystalDiskMark
is the
de-facto standard for storage benchmarks. I’m using the 64-bit edition of CDM, version 5.2.0.I/O TYPE
READ
WRITE
Sequential QD32
91.80 MB/s
60.56 MB/s
Sequential
93.33 MB/s
61.66 MB/s
4K Random QD32
8.319 MB/s
2129.7 IOPS
4.004 MB/s
1025.0 IOPS
4K Random
8.121 MB/s
2079.0 IOPS
3.971 MB/s
1016.6 IOPS
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The sequential I/O speeds are on par with a modern microSDXC card, and the IOPS aren’t too shabby either; they exceed the IOPS requirements for the A1 performance classwhich
requires R/W IOPS of 1500 and 500 respectively. This could make this type of card a viable option for other write-heavy environments – this includes single-board computers (SBCs) like the Raspberry Pi, where memory card failures due to excessive writes are common.ATTO DISK BENCHMARK
*
The card’s read/write performance levels off at around the 64-kilobyte mark during testing, showing that operations smaller than this incur a significant performance penalty. This may also be indicative of the internal page and block sizes of the NAND Flashitself.
HARD DISK SENTINEL
Hard Disk Sentinel comes with a bunch of disk benchmarking tools, including some to test the entire “surface” of a drive. I used the software’s Surface Test tool to measure the card’s performance before and after filling the drive with data – first with random data, then with all zeroes.RANDOM SEEK TEST
The Random Seek Test measures the card’s latency when performing random “seeks”, although more accurately it reads a single sector from a random location.STATE
AVERAGE LATENCY
MINIMUM LATENCY
MAXIMUM LATENCY
Empty/Initial (0x00)360 µs
350 µs
420 µs
Random Fill
600 µs
590 µs
670 µs
Zero Fill
600 µs
590 µs
690 µs
The card initially had about 420 microseconds of latency, but after filling the card with random data, this increased to 670 microseconds. Filling the card with all zeroes again did not improve performance, and his isn’t helped by the fact that SD cards generally lack theability to “TRIM
”
unused sectors like SSDs or eMMC chips. FULL SURFACE READ (OR AT LEAST AN ATTEMPT)*
Sequential read speeds over the length of the card, taken from HardDisk Sentinel.
This is where things get a bit… interesting. It was around this time that I noticed some performance inconsistencies that didn’t show up on other benchmarks. Although the I/O speeds largely matched what my other benchmarks revealed, I noticed frequent dips below normal, often down to the mid-20 MB/s range! I wasn’t sure that this was necessarily the card’s fault (pauses in read/writes could result in performance degradation on a device if it can’t buffer the writes well enough), or if my card reader/operating system/etc. wasresponsible.
I decided to hold off on publishing the sequential write test until I get this issue figured out – perhaps it’s worthy of a blog postall on its own…
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RESURRECTING A DEAD MACBOOK PRO (MID-2012 13-INCH, MODEL A1278) Posted on July 7, 2019by ginbot86
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A couple weeks ago, I picked up a dead MacBook Pro that was on its way to the recycle bin, and was curious as to whether I would be able to fix it. It had a note attached to it citing several issues with the computer: the display doesn’t work, the battery doesn’t charge, one of the USB ports doesn’t work, and it won’t load an operating system. It certainly didn’t look particularly promising, but I felt it would be a good way to test my skills in component-level repair – with a pretty nice prize if I succeeded.TRIAGE
The computer I picked up is a mid-2012 MacBook Pro by Apple; it is theA1278 model
with a logic board number of 820-3115-B, and it comes with an i7-3520M CPU and 8 GB of DDR3 RAM – however, the hard drive was taken out of the computer by the time I received it. As previously noted, the computer had a laundry list of issues that were certainly the reason the original owner decided to discard their computer – a laptop that doesn’t boot nor have a display isn’t a particularly useful one. Connecting a MagSafe AC adapter to the computer revealed even more issues: even though the unit was already noted that it wouldn’t charge, I noticed there was no LED indicator on the power adapter’s plug, and the computer wouldn’t power on, even with external power connected; the only sign of life was one of the LED level indicators rapidly flashing when I pressed the button. With this functionality test being unsuccessful, I decided to open up the computer to see whatelse was wrong…
TROUBLESHOOTING & DIAGNOSIS Unscrewing the bottom cover revealed what horrors the computer had experienced. There was clear evidence that it had suffered from liquid damage: rampant corrosion around the LCD connector and some of the power circuitry, and some of the corrosion deposits were even left on the computer’s bottom cover! If you watch Louis Rossmann’s videos, you would
know that liquid damage rarely is an easy fix, especially when high-voltage LED backlight circuitry gets involved. * Corrosion deposits around LCD backlight connector, backlight driver, and power railcurrent sensor.
Liberal use of a 70% isopropyl alcohol solution and a brush was able to scrub away all the corrosion on the computer’s logic board, and the results were not pretty:*
After cleaning up all the corrosion, lots of components and PCB traces have been corroded or lost entirely. Note the dark and tarnished probe points – they should be silver. The pads in the center used to havea fuse…
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Many PCB test pads were either corroded or entirely gone, the backlight fuse (and its pads) were nowhere to be found, and some ICs were missing entire pins! Whatever was spilled on this area of the MacBook certainly had some corrosive properties to it, and it looks like nothing was done to stop the initial damage. With a schematic and board-view software in hand, it was time to investigate what particular components had suffered damage.* F9700 (backlight
fuse) as shown in the schematic, which can be looked up in the boardview.
* OpenBoardView in use, showing what F9700 connects to, and where.POWER SUPPLY
Before any device can perform any useful functions, it needs power. I reconnected the AC adapter and started to check the voltages around the DC input jack and its surrounding support circuitry. Since I was able to press the MacBook’s battery indicator and get some response when connected to power, I knew that the main input fuse was intact, and that the SMC (System Management Controller) chip
was receiving power via the PP3V42_G3H rail and functional; the G3H (G3-Hot) designation means that the power rail is always on, even if the computer is otherwise turned off. I checked the voltage at the DC jack’s ADAPTER_SENSE line, which is normally at approximately 3.3 volts and uses the 1-Wire protocolto
communicate with the power adapter and control the LED on the power adapter’s MagSafe plug. To my surprise, it was at a staggering 16 volts, which meant that something was shorting the DC input voltage (about 16.5 volts) onto a low-voltage communication line – no wonder there wasn’t any LED indicator when I plugged it in! A multimeter measurement found about 2 kOhms of resistance from the power line to the communication line. Thankfully the MacBook’s logic boardfeatures a MAX9940
1-Wire
overvoltage protection chip, which is rated to protect against voltages as high as 30 volts. I scavenged another DC input connector from an older, dead MacBook which shared the same connector and pinout. After connecting this to the logic board, I found that I got a green LED upon connecting the AC adapter, and the CPU fan started spinning; this is a VERY GOOD SIGN as this means the main power circuitry is intact. Measuring the CPU’s Vcore voltage revealed a voltage of about 0.8 volts, which is normal for a modern laptop CPU. With the “heart” of the computer checked out, it was time to focus on the area most affected by the water damage.LCD & BACKLIGHT
Examining the backlight connector and its surrounding circuitry revealed significant damage to many components and the PCB itself. The power supply pins on the LCD connector showed a significant amount of corrosion, and I was concerned that the backlight’s output voltage (up to 52 volts!) could have made its way through all the corrosion residue and damaged critical data lines between the display and the graphics controller. I noticed the backlight fuse (F9700, a 3-amp 0603-size fuse) had gone more than just open-circuit – I couldn’t even find the fuse or its corresponding PCB pads initially! I then probed the LCD connector and found that the display’s 3.3-volt power lines were open-circuit; the corrosion had eaten through the traces between the connector and its decoupling capacitors nearby. Using a diode-mode measurement on the FPD-Link (often called LVDS) lines revealed that the connections were intact; there weren’t any anomalous readings or short-circuits on those lines, the DDC (Display Data Channel) lines, and the
3.3-volt power lines. Due to the high voltages used to drive LED backlights, I had my suspicions on U9701 (a Texas Instruments LP8550 LED backlight driver). It’s a tiny ball-grid array (BGA) package, and attempts to clean the chip from its edges didn’t seem to do much. Its corrosion looked limited at first – only the feedback line’s probe point was lost – but I was sure the chip was on its last legs (or is it balls?).POWER MANAGEMENT
The LCD connector is in close proximity to the computer’s DC input and its “PPBUS_G3Hot” power rail, which is always on (even if the computer is otherwise turned off), which exacerbates any corrosion due to liquid damage due to its high voltage. Further examination revealed significant corrosion on the outside of the CPU’s high-side current sense resistor (R5400), and the current-measurement pins (pins 4 and 5) on U5400 (a Texas Instruments INA213 current-sense amplifier) were completely gone! Clearly there was no way to salvage thatcomponent.
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There was significant damage to the SMC’s DC input voltage sense circuitry (“VD0R”), with pins 3 and 4 of Q5490 (an ON Semiconductor NTUD3169CZcomplementary
pair of N-channel and P-channel MOSFETs) being completely eroded away, much like U5400’s current-sense pins; this part of the circuit uses a P-channel MOSFET to switch on a resistive voltage divider, allowing the SMC to measure what the voltage is on its MagSafe input connector. Also, many of the probe points related to that circuit were also completely eroded, revealing dark pits instead of silver-plated copperpads.
FIREWIRE
The FireWire circuit wasn’t spared from the carnage, either. Pins 3 and 4 on Q4262 (a Diodes Incorporated BSS8042DWcomplementary
MOSFET pair) were also severely damaged; these pins are used to quickly disable the FireWire power output transistor (Q4260, an ON Semiconductor FDC638PP-channel
MOSFET) in case of a “Late-VG event“.
This occurs if the ground pins of the FireWire connector are mated too late when plugging in a device – this creates a dangerous overvoltage condition on the FireWire data lines, as up to 30 volts briefly find a return path through the data lines, risking damage to the device and host controller. I wasn’t as concerned with this circuit, as I don’t have any FireWire peripherals, and the circuit in its current state simply means the FireWire port will be unable to disconnect power if a bad cord is plugged in.THUNDERBOLT
The area that had the least liquid damage was C3897, which belonged to U3890 (a Linear Technologies LT3957,
a 15-volt boost converter for the MacBook’s T29 chip and Thunderbolt interface). All this area needed was a bit ofcorrosion cleanup.
USB PORT
During the functionality tests, I noticed the metal casings of the USB port were getting very hot to the touch, and I nearly burned myself on U4600 (a Texas Instruments TPS2561 , a dual-channel load switch with internal current limiting)! I found a short-to-ground problem on a power line on one of the USB ports, which explains the symptom listed on the note. I desoldered the chip, initially thinking the issue was in the chip itself, but the fault remained. I narrowed the problem down to C4695, a 10-microfarad ceramic capacitor that had short-circuited internally; this caused the TPS2561 to go into current-limiting mode, which turns the chip into a resistor and dissipate copious amounts of heat into the PCB, which made its way to the USB ports (and then my fingers – ouch).HARD DRIVE CABLE
During the repair process, I was able to install Mac OS X Lion to a SATA SSD, but soon found the MacBook unable to recognize SSDs, despite hard disk drives showing up just fine! As it turns out, the A1278 isnotorious
for bad HDD cables, with even replacements failing within months of installation. This appeared to be caused by chronic frictional damage, as the cable is sandwiched between the hard drive and the MacBook’s rough aluminum casing – even regular use of the laptop was found to create hairline cracks in the cable. Thankfully replacements are relatively inexpensive, and a little bit of Kapton tape as a barrier against the casing was the “vaccine” against future cablefailures.
*
Replacement SATA cable on top. The PCB traces seem thicker and more robust than the original.REPAIRS
With all of the problems written down, it was time to start fixing up the MacBook. Time to break out the hot air rework station, soldering iron, solder, magnet wire, and plenty of flux!DC INPUT JACK
I desoldered the DC input jack, and found there was a lot of corrosion residue bridging the +16.5-volt power line to the ADAPTER_SENSE 1-Wirecommunication line.
* Black corrosion deposits under the MagSafe connector, causing a high-resistance short of the ADAPTER_SENSE data line to 16.5 volts. * The PCB side of the corroded MagSafe connector. Note the loss of copper on the pads.Report this ad
With some isopropyl alcohol and some scrubbing with a small brush, I was able to clean up the corrosion and resoldered the jack into place. A quick multimeter test found that there was no more 2 kOhms of resistance from the power to the data line, and I was able to get an LED indication when I plugged in the AC adapter, including an orange light that indicates the battery is charging.LCD CONNECTOR
I wanted to determine if the display was still functional, so I first focused my attention to the LCD connector, even if I had to eschew the LED backlight for a bit. I ran a jumper wire from L9004 to pins 2 and 3 of the LCD connector; this belongs to PP3V3_LCDVDD_SW_F, which provides the 3.3-volt power to run the LCD panel except the backlight. After cleaning out the flux and corrosion on the logic board’s connector as well as the LCD cable, I was able to get an image on the display!*
Jumper from L9004 to pins 2 and 3 on J9000 backlight connector. Damage to Q4262 also visible.*
A “frontlit” MacBook LCD.USB PORT
With the faulty component identified, I replaced C4695 with an identically-rated 10-microfarad 6.3-volt X5R ceramic capacitor in an 0603-sized package. After replacing the capacitor, the USB port was fully functional again!*
Replaced C4695 USB output capacitor. 10 uF, 6.3 volt X5R, 0603 size. CURRENT-SENSE AMPLIFIER After ordering both the INA213 and LP8550 from Texas Instruments, it was only a few days before they arrived in the mail. I desoldered the dead chip from the logic board, cleaned up the pads with some flux and desoldering braid, and installed the new chip. Running Apple Service Diagnostic tools showed that the current-sensing circuit was workingcorrectly.
DC INPUT VOLTAGE DIVIDER SWITCH * Replaced PFET half of Q5490 (centre) with NTK3142P, bypassing lost traces/probe points. R5494 replaced with wire jumper, on left.Report this ad
I didn’t want to buy another transistor pair for Q5490, so I replaced the P-channel half with an ON Semiconductor NTK3142PP-channel
MOSFET that I salvaged from an older donor MacBook logic board. I scraped away some solder mask on one of the broken traces heading to the SMC’s voltage divider so I could solder the transistor’s drain terminal to it, and used magnet wire to connect the transistor’s gate and source to their corresponding locations across R5491. R5494, leading to PM_SUS_EN, was found to have a 0-ohm resistor that was open-circuit; this was easily bypassed with a wire jumper across the resistor’s original pads. After cleaning off the flux and performing continuity measurements, I measured the voltage at the SMC’s voltage divider resistors and got a valid voltage reading when I plugged inthe AC adapter.
LED BACKLIGHT DRIVER The LP8550 was up next for repair. I took a 2-amp 0603-sized fuse from a dead hard drive, and used some magnet wire to reattach it to the remnants of F9700, which was a 3-amp fuse originally; note that it’s far safer to use a fuse of a smaller rating instead of a larger one, should a circuit fault still exist. Tracing the other lines to the LP8550 revealed that R9731 (leading to PPBUS_SW_LCDBKLT_PWR) was open-circuit at a via, which was easily bridged with some solder and magnet wire. R9010 (leading to PPBUS_SW_BKL) was open as well. After reinstalling the fuse, I actually got the backlight working! However, upon a power cycle I heard a _snap_, saw a puff of smoke, and lost the original backlight chip. Chances are there was indeed some corrosion residue had caused 50-odd volts to end up on a more sensitive pin on the LP8550. I used an Xacto knife to lightly scratch an outline around the chip, then used copious amounts of flux and desoldered the dead chip with my hot air rework station; I also removed the fuse to help in further troubleshooting to ensure that there weren’t any short-circuits to ground on the backlight circuit. I cleaned up the area with leaded solder and some solder wick, and cleaned up the residual flux in anticipation of the new chip’sinstallation.
*
The remnants of the original LP8550 (U9701). Note the damage to lowest-right ball on PCB, lowest-left on chip. F9700 temporarilyremoved.
*
New LP8550 installed, with replacement fuse. The chip was remarkably easy to install – just get the A1 ball lined up according to the board view, and heat the board to the right temperature. After thoroughly cleaning away the flux from the area, I turned on the MacBook… and let there be (back)light! I power-cycled the computer and the LED backlight remained functional! (And for the record, the fuse didn’t even blow during the entire ordeal.) FIREWIRE LATE-VG PROTECTION CIRCUIT I considered this issue to be a “WONTFIX “, as I had no use for FireWire connectivity (nor do I have the correct FireWire 800 cables anyway). If I want to sell this computer, I might install a P-channel MOSFET to replace Q4262 (see the_ LCD Connector_ section above) in a similar fashion to the DC input voltage-sensing circuitry.TESTING
It takes a little bit of Google-Fu, but with the help of a BitTorrent client, I downloaded the disk images to create an Apple Service Diagnostic (ASD) drive. This is far more sophisticated than the built-in diagnostic when you boot the computer while holding down the D key. With ASD, one has the option to use a stripped-down version of Mac OS X – in a similar vein as WinPE – or a very lightweight UEFI (Universal Extensible Firmware Interface) environment that looks very much like Mac OS 9 and earlier.*
LCD backlight restored; all tests passed in Apple Service Diagnostic!Report this ad
It took over half an hour, but all the tests passed without a problem, since all the sensor readings were valid. MY MACBOOK PRO HAS BEEN RESTORED TO WORKING ORDER! I installed Mac OS X High Sierra to a 1TB SSD, and used Boot Camp to run Windows 10 Pro as the default operating system (what can I say, I like Windows ). The Mac Precision Touchpad driver projectmakes the
touchpad a pleasure to use, as the built-in Boot Camp driver provides a much less-comfortable experience.CONCLUSION
Much like solving a puzzle, component-level troubleshooting of modern electronics is possible, but this is only feasible if the relevant documentation exists as a good reference point. One can do without them, but the act of reverse engineering isn’t easy if one only has a non-working device. With the help of a schematic and board view (including the open-source software OpenBoardView ), one can easily find what circuits a component belongs to, and where it goes. By following the connections, one can track down the problem(s) with the board, and hopefully save a device from an untimely end in the landfill or a recycling facility.RIGHT TO REPAIR
This project is an example of why I believe in the right to repair . If I didn’t have (even unofficial) access to schematics, board views, and diagnostic software, I wouldn’t have been able to bring this dead MacBook Pro back to life. However, with a little bit of electronics troubleshooting knowledge and skill, I was delighted that I diverted a discarded dysfunctional device from a demise in the dumpster. In fact, this blog post was written from the MacBook I just repaired!SHARE THIS:
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ATOMIC PI ADVENTURES, EPISODE 1: ADDING EXTERNAL PCI EXPRESS EXPANSION BY REMOVING ONBOARD ETHERNET Posted on June 25, 2019by ginbot86
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TL;DR: The Atomic Pi single-board computer CAN be expanded through PCIe. It’s just a massive pain to do so, even if you have steady hands. Let’s just say it’s a long story… DISCLAIMER: The modification performed in this blog post _can_, and _has_, caused PERMANENT HARDWARE DAMAGE to my Atomic Pi, albeit repairable with much skill and effort. Reenacting what I’ve done requires significant experience with SMT (surface-mount technology) components, some barely larger than a grain of sand (I consider 0402-size components to be “oversize” in this instance). I accept no responsibility for damages arising from attempting thismodification.
INTRODUCTION
Single-board computers (SBCs) are all the rage nowadays, with theRaspberry Pi
being
the most well-known in this category. SBCs are compact computers, carrying their own CPU and memory, and usually some on-board storage and various I/O connections (e.g. USB, HDMI, Ethernet). Most of these computers use the ARM architecture , found on almost all mobile devices today. However, some use the x86 architecture, which
is used in higher-end tablets, laptops and desktop computers. Recently, the Atomic Pi made waves in the electronics hobbyist space, boasting an Intel AtomZ8350
quad-core CPU with 2 GB of RAM, 16GB of eMMC storage, Gigabit Ethernet, Wi-Fi, USB 3.0, built-in speaker amplifiers, and lots of general-purpose I/O (GPIO) pins – all for less than $40 USD!*
An (unmodified) Atomic Pi SBC. Continue reading →SHARE THIS:
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DISCREET QUALITY: REVIEW OF THE SKETCHIEST-LOOKING 512GB LEXARSDXC CARD
Posted on February 24, 2019by ginbot86
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It’s amazing how much Flash-based storage technology has advanced in the last few years, especially considering how much prices havedropped.
Naturally, when it comes to speed, capacity and price, consumers tend to look for the lowest price; as manufacturers race towards the bottom line, many will take the low road and sell counterfeit goods.
This is especially prevalent in the NAND Flash market, and online marketplaces like eBay, AliExpress and even Amazon are fraught with countless fake storage devices that claim high capacities at too-good-to-be-true prices. It’s not uncommon to see unrealistic capacities sold for a few tens of dollars, but what the customer ends up receiving is a storage device with a falsified capacity that will pass a simple copy-paste test but will corrupt itself with extendeduse.
While browsing eBay for some deals on some Flash storage, I happened upon a very strange-looking 512GB SDXC card. It was listed as an OEMLexar card
but had no labels, selling for an unprecedentedly low price of $60 USD (the card would cost several times more at normal retail outlets). On the outside, everything about the card’s exterior seems to raise a red flag that the card is not to be trusted. eBay listing of the Lexar OEM 512GB SDXC card Upon closer inspection, there are some hints that one shouldn’t always judge a book – er, card – by its cover. The laser-etched markings might look like cryptic gibberish to the layperson, but the markings “SM2702BAC” and “L95B” have actual meanings; theSM2702
is an SD card controller by Silicon Motion, and L95B refers to the 16nm generation of MLC NAND Flash by Micron, which owns the Lexar brand (but unfortunately is being discontinued).
The seller also says that the cards have been tested, which isreassuring.
I decided to take the plunge and plunk down about $80 USD including shipping (or $105 CAD at the time) and buy a card for myself.A CLOSER LOOK
After waiting a few weeks, the card showed up in my mailbox. The seller did a very good job packaging it, even placing the card in an ESD shielding bag before wrapping it with foam and placing it in a bubble mailer (it’s much better than the plastic wrap I’ve had some used i7 CPUs by a huge amount). Back of the Lexar OEM 512GB SDXC card Front of the Lexar OEM 512GB SDXC card The card looks very plain, with the top label area lacking any labeling, and the same laser-etched markings on the back. The card’s contacts indicate that it has been placed in a card reader a few times before (presumably for testing).CARD IDENTIFICATION
I used my old Gateway M-7305u laptop with Kali Linux to see what information the card reports. These older laptops have true SDA (SD Association) compliant card slots, so they will identify as an actual SD card instead of a USB drive like with many modern laptops; in Linux these show up as devices like /dev/mmcblk0 instead of /dev/sda. By using the “dmesg -wH” command I can read the kernel logs once the card is connected to the computer. mmc0: new high speed SDXC card at address 59b4 mmcblk0: mmc0:59b4 483 GiBmmcblk0: p1
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The card reports a capacity of 483 GiB (that’s binary gigabytes, or 519.6 decimal – a.k.a. “weasel” – gigabytes), but the SD card name is ” ” – five ASCII spaces. Everything about the card superficially rings alarm bells! However, I wasn’t phased, and decided to try the card in my Kingston FCR-HS4 USB 3.0 card reader, which uses the Realtek RTS5321 chipset. OEM Lexar 512GB SDXC card in Disk Management Examining the card in Windows shows that the card was formatted as exFAT with a drive name of “SDXC”, suggesting it may have been formatted by the seller with the SD Formatter tool. Looking at the raw sector data in Hard Disk Sentinel suggests that the seller indeed do a full capacity test, as the data patterns match that of the program H2testw, an excellent tool for detecting fake Flash memory. This is a good sign – the seller did their due diligence and by this point I already had a good feeling that the card is genuine. However, I wanted to test this for myself, so I ran the H2testwutility myself
and let it run on the card. The write speed remained consistent throughout, which is a good indication that the card is not overwriting memory locations like in fake Flash storage (the card did get uncomfortably hot during the process, however). It took four hours to complete the write and read test, but everything came out clean – the card is genuine, even when every other sign says otherwise! H2testw verifying that the OEM Lexar card’s 512GB capacity isgenuine
PERFORMANCE
With the card verified, it was time to put it to the test.CRYSTALDISKMARK
The card showed sequential read speeds of 92.03 MB/s and sequential write speeds of 60.45 MB/s; the sequential write speed coincides with the seller’s rating of 400x (400 * 150 kB/s = 60 MB/s). The random 4K I/O performance isn’t great, especially with writes, but it isn’t bad either. The card managed 4K random read speeds of 6.644 MB/s (1700.9 IOPS) and 4K random write speeds of 0.671 MB/s(171.8 IOPS).
Benchmark of the 512GB Lexar OEM SDXC card in CrystalDiskMark 3.0.4CONCLUSION
In the end, I was satisfied – I got a 512GB SDXC memory card at a fraction of the cost from a normal retail outlet. It’s not exactly a speed demon, but it’s not a slowpoke either. The looks may be deterring for most folks (and rightly so), but with the right tools and knowledge, one can pick up one of these less aesthetically-pleasing memory cards and save some serious coin in theprocess.
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EMMC ADVENTURES, EPISODE 4: RECOVERING DATA FROM PHYSICALLY DAMAGED BGA EMMC FLASH STORAGE CHIPS Posted on January 22, 2019by ginbot86
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The ball grid array (BGA) chip package has been instrumental in getting modern electronics to fit in smaller and smaller spaces, as it uses tiny balls of solder on the bottom of the package to make electrical connections, instead of copper leads on the edge of the chip package. This allows for hundreds of connections to be made in a small amount of PCB area, but their size also makes them very vulnerable to damage as well. * eMMC with severe pad cratering on critical data/control lines One common way for BGA chips to become damaged is called “pad cratering “, where the copper pad on the package’s substrate (basically a wafer-thin circuit board) separates and leaves behind a crater. Continue reading →SHARE THIS:
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QUICK UPDATE: JUMPING OFF THE (FREE)WAGON Posted on January 4, 2019by ginbot86
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Purchased a 1-year subscription to WordPress Personal on January 4,2019
After staying on WordPress’ Free plan for almost 7 years, I’ve finally purchased a WordPress Personal subscription plan. Although it’s a bit more expensive than a free plan _(duh)_, but we’ll see if the ad revenue that WordAds generates will be enough to cover thecosts.
I wonder whether using the Free plan is a factor in how WordAds determines its payout rate. Let’s find out when I release my next update on WordAds revenue… UPDATE (MAY 11, 2019): SPOILER ALERT, IT DOESN’T. IF YOU’RE EARNING AD MONEY ON A FREE PLAN, THERE’S NO POINT UPGRADING TO A HIGHER TIER. IF ANYTHING, I’M NOW LOSING MONEY AS 2019’S AD REVENUE RATES HAVE PLUMMETED TO VERY LOW LEVELS.SHARE THIS:
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RAMBLE: 2018 IN REVIEW Posted on December 31, 2018by ginbot86
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Can you believe it? Another year has gone by in what seems like an instant – and boy has it been quite the year for the blog.SMASH HITS
This year has seen quite a few popular posts, with my blog post about building my own memory card seeing a whopping 11,450 views in March alone, totaling 18,195 views this year; in fact, March represented the second-largest view count of all time on my blog with 23,955 views, a tad under July 2015’s 25,100 views. My blog post about running Doom on an oscilloscope netted 5,670 views, and another post where I fixed an Intel Atom-basedtablet
well beyond economic repair received 2,700 views. Interestingly enough, my blog posts about the Kentli PH5 Li-ion AA battery (both itsteardown
and review
)
received 5,280 and 3,250 views, respectively – both without seeing any significant external referrals except through search engines; this also applies to the 2,900 views on my Kitchenaid induction cooktop blog post, which seems to imply that plenty of these cooktops are encountering problems in the field. VIEWS, VIEWS, VIEWS! This year’s view count is the second best on record, scoring 126,250 views, compared to 2016’s 140,000 views. This is a good comeback after 2017’s significantly reduced viewership which only saw 99,390 views, and is a decent step ahead of 2015’s 120,140 views. However, it appears the number of views from each visitor has decreased over the years (that is, it appears that readers aren’t staying as long on my blog as they used to). The drop began in mid-2016 after I changed my blog over to ripitapart.com domain instead of the .wordpress.com subdomain that it used to be. Perhaps this is a direct consequence of my domain change, or maybe it’s just a coincidence and readers just don’t stick around as long anymore. THIS (AD) SPACE FOR RENT This marks the first full year that I’ve taken advantage of theWordAds program
, allowing
me to monetize the advertisements that appear on my blog as a natural consequence of running on WordPress’ Free hosting tier. This year brought in $194 USD in ad revenue, which has helped pay for my domains and G Suite registration through WordPress in full (totaling $125 USD per year for three domains and G Suite). This means that simply keeping the blog alive no longer is a strain on my wallet, which is a tremendous help for me.LOOKING FORWARD
As we say goodbye to 2018 and welcome 2019 with open arms, there’s always room to grow the blog further. I’ve been considering avenues like running a vlog on YouTube, and maybe even viewer contribution programs like Patreon (although recent issues with the aforementioned platforms have given me pause). I still have a bunch of blog posts simmering on the back burner, so to speak. Some of these include data recovery from physically damaged eMMC modules (yes, I’m still doing stuff with eMMC ) and upgrading the RAM in the cheap tablet I mentioned earlier. The upcoming year will be full of changes in my personal life as I finish my post-secondary education and being my search for full-time work.All in all…
HAPPY NEW YEAR! THANKS TO ALL MY VIEWERS – I COULDN’T HAVE COME THIS FAR WITHOUT YOU! –JASONSHARE THIS:
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PERFORMING SAFER AC LINE VOLTAGE MEASUREMENTS USING ISOLATED AMPLIFIERS Posted on November 13, 2018by ginbot86
1
_DISCLAIMER: AC LINE (MAINS) VOLTAGE IS NOT SOMETHING TO BE TAKEN LIGHTLY! ATTEMPTING TO SAFELY HANDLE LINE VOLTAGES WHILE MINIMIZING THE RISK OF HARMFUL OR FATAL ELECTRIC SHOCK IS THE MAIN MOTIVATOR FOR ME TO DESIGN AND BUILD THIS CIRCUIT. HOWEVER, I AM NO ELECTRONICS ENGINEER AND I DEFINITELY HAVE NO FORMAL TRAINING ON INTERNATIONAL STANDARDS PERTAINING TO HIGH-VOLTAGE SAFETY. I ACCEPT NO RESPONSIBILITY, DIRECT OR INDIRECT, FOR ANY DAMAGES THAT MAY OCCUR IF YOU ATTEMPT TO MAKE THIS CIRCUIT YOURSELF, INCLUDING PERSONAL HARM OR PROPERTY DAMAGE. ADDITIONALLY, THERE IS NO WARRANTY OR GUARANTEE, EXPRESS OR IMPLIED, ON ANY CONTENT PERTAINING TO THIS BLOG POST (ORANY OTHER POSTS)._
------------------------- _UPDATE (NOVEMBER 19, 2018): ADDED ISOLATION VOLTAGE RATINGS FOR THE AMPLIFIER AND DC-DC CONVERTER._AS SEEN ON HACKADAY
!
Back in mid-2017 I won a Keysight DSOX1102G digital storage oscilloscope (DSO), a piece of equipment long on my wish list but never acquired until then. One thing I’ve wanted to be able to measure with an oscilloscope for a long time was the waveform of the AC utility (in other words, the wall outlet). However, doing so presents a very real risk of blowing equipment up or shocking yourself (and possibly other people). In order to prevent this, I needed a way to perform measurements on the AC line without being directly connected to it; in other words, I need GALVANIC ISOLATION.
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EMMC ADVENTURES, EPISODE 3: BUILDING A CUSTOM ADAPTER TO USE CHEAP EMMC-BASED 32GB SSD MODULES Posted on November 6, 2018by ginbot86
7
AS SEEN ON HACKADAY
!
While on my quest for more eMMC-based storage devices, I stumbled upon a few devices that piqued my interest: eMMC-based SATA SSDs! I found two models of particular interest: Dell had M.2 modules with a 2.5″ adapter, and HP had custom boards intended for use in cheap laptops (for example, the HP 14-an012nr). Although the
former was easier for me to use (but not acquire), I will be focusing on the latter in this blog post. Continue reading →SHARE THIS:
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GAINING ACCESS TO THE WINDOWS CE DESKTOP (AND DOOM!) ON THE KEYSIGHT DSOX1102G OSCILLOSCOPE Posted on October 15, 2018by ginbot86
6
AS SEEN ON HACKADAY! _TL;DR – YES, THE KEYSIGHT 1000 X-SERIES OSCILLOSCOPE RUNS DOOM! THE JOURNEY GETTING THERE WASN’T EASY, THOUGH._ The oscilloscope is one piece of equipment that any self-respecting electronics enthusiast should have. In short, oscilloscopes let you view the electronic waveforms of a circuit, and digital storage oscilloscopes (DSOs) are especially useful since they can reveal infrequent glitches on signals that an analog oscilloscope or a multimeter wouldn’t pick up. Keysight DSOX1102G oscilloscope The subject of my blog post is the DSOX1102G from Keysight Technologies (formerly Agilent), which is part of their low-end offerings that still offer very good value compared to their competitors. As with most of their oscilloscope offerings, they run an embedded operating system called Windows Embedded CE6.0 (AKA
Windows CE or WinCE), but as with most WinCE applications, you almost never see the Windows interface since it’s hidden behind a customuser interface.
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UPGRADING A PASSIVE POWER OVER ETHERNET SPLITTER WITH 802.3AF COMPATIBILITY Posted on August 22, 2018by ginbot86
2
AS SEEN ON HACKADAY
!
If you haven’t heard of Power over Ethernet,
chances are you’ve experienced its usefulness without even knowing about it. Power over Ethernet (PoE for short) does exactly as the name implies: power is sent over the same Ethernet cable normally used for data transfer. This is often used for devices like IP phones and wireless access points (often you see these APs in restaurants and other establishments mounted to the ceiling to provide Wi-Fi access), as it is far easier, cheaper and safer to provide low-voltage power instead of wiring in AC power which requires the help of a licencedelectrician.
*
My ceiling-mounted Ubiquiti UAP-AC-PRO Wi-Fi access point, a typical use case for Power over Ethernet Continue reading →SHARE THIS:
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WORDADS ADVENTURES, EPISODE 4 Posted on July 25, 2018by
ginbot86
2
Oh my, it has been a while since the last update,
hasn’t it?
RESULTS FOR FEBRUARY TO JUNE 2018 Since my last report, I managed to earn $45 in one month after getting my blog post featured on the r/hardware subreddit , which then made its way to Hacker News (a news aggregation site), bringing the most traffic to my site in many years; March 2018’s view count was the second highest on record, bested only by June 2014’s 25,051 views which were not monetized. I even received my first payout on May 29th. However, the rest of the months have been less fruitful, especially as of late. Since May, my monthly ad revenue has dropped _below $10 USD/month_. I thought that the boost in traffic from March would result in more views after the fact – I could not have been morewrong.
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STATUS UPDATE: OF PHONES AND FIRE Posted on May 15, 2018by ginbot86
4
Things might be on a bit of a hiatus for the next little while. My trusty Sony Xperia Z5 Compact literally went up in flames a few hours ago, and I need to find a replacement very soon, as well as recover any data that wasn’t saved to my SD card. Thankfully, apart from a sore throat and burning eyes from battery smoke, I am doing fine (aswell as my house).
My Sony Xperia Z5 Compact… after the lithium-ion battery fire. Once things settle down, I’ll hopefully have a juicy story about lithium-ion battery fires and (failed) eMMC data recovery. UPDATE (MAY 18, 2018): I upgraded to a Samsung Galaxy S9 a couple days ago. The eMMC chip I desoldered from the Z5 Compact is effectively bricked, as it only identifies itself but no data can be read – I suspect that the intense heat must have “baked” the NAND flash and result in too many uncorrectable bit errors that the firmware couldn’t recover from. There goes my progress in Angry Birds 2 (among other data)…SHARE THIS:
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RECOVERING COOKIE CLICKER SAVES FROM AN OFFLINE INSTALLATION/BACKUP OFGOOGLE CHROME
Posted on May 3, 2018by ginbot86
4
UPDATE (AUGUST 29, 2018): _Turns out cleaning out your cookies/cache will erase your Cookie Clicker save. Who would’ve thought…_ Cookie Clicker saves: You don’t realize the importance of saving your progress until you lose your save data. A few days ago I opened Chrome to my always-running instances of Cookie Clicker, but found that all of my progress was deleted (and it was showing a “Don’t forget to back up your save” message just to add insult to injury). My heart sank when I realized that one of my runs, over three years old, had suddenly vanished into thin air. I tried restoring Google Chrome’s data via a Shadow Copy; no dice. I tried using my Windows Home Server 2011 backups, but realized that it would take over an hour to restore my Chrome folder. After much frustration, I decided to retrieve and examine Chrome’s Local Storage folder and see whether I could retrieve my save files that way – and it worked! Here’s how to recover your own Cookie Clicker saves… Continue reading →SHARE THIS:
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COMPLETED: SELF-DISCHARGE TEST OF KENTLI PH5 1.5V LI-ION AA (PART 6) Posted on May 1, 2018by ginbot86
4
_Looking for the teardown or how well the Kentli PH5 battery performs under load?
Click the links to learn more._ It’s finally happened – the self-discharge test of the Kentli PH5 Li-ion AA battery has finally come to an end… and it only tookalmost 3 years!
Kentli PH5 Voltage (Jun 18, 2015 – Apr 29, 2018) Kentli PH5 State of Charge (Jun 18, 2015 – Apr 29, 2018) Kentli PH5 self-discharge test statistics Continue reading →SHARE THIS:
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EMMC ADVENTURES, EPISODE 2: RESURRECTING A DEAD INTEL ATOM-BASED TABLET BY REPLACING FAILED EMMC STORAGE Posted on February 25, 2018by ginbot86
32
AS SEEN ON HACKADAY! Recently, I purchased a cheap Intel Atom-based Windows 8 tablet (the DigiLand DL801W) that was being sold at a very low price ($15 USD, although the shipping to Canada negated much of the savings) because it would not boot into Windows – rather, it would only boot into the UEFI shell and cannot be interacted with without an external USBkeyboard/mouse.
THE PATIENT, ER, TABLET The tablet in question is a DigiLand DL801W (identified as a Lightcomm DL801W in the UEFI/BIOS data). It uses anIntel Atom Z3735F
–
a 1.33GHz quad-core tablet SoC (system-on-chip), 16GB of eMMC storage and a paltry 1GB of DDR3L-1333 SDRAM. It sports a 4500 mAh single-cell Li-ion battery, an 8″ 800×1200 display, 802.11b/g/n Wi-Fi using an SDIO chipset, two cameras, one microphone, mono speaker, stereo headphone jack and a single micro-USB port with USB On-The-Go support (this allows the port to act as a USB host port, allowing connections with standard USB devices like keyboards, mice, and USB drives). Continue reading →SHARE THIS:
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WORDADS ADVENTURES, EPISODE 3 Posted on February 12, 2018by
ginbot86
3
Another month has passed and that means another round of ad revenuetrickling in.
RESULTS FOR JANUARY 2018 This is rather interesting – despite getting _more_ views than December 2017, the pay rate was _lower than before_! Curious to see what the dollar-per-impression rate was for each month, I tabulated the results and graphed them:PERIOD
EARNINGS
VISITORS
VIEWS
ADS SERVED
$/IMPRESSION
Nov 2017
$ 5.03
3833
8538
4648
$ 0.00108219
Dec 2017
$ 15.18
4344
9732
17369
$ 0.00087397
Jan 2018
$ 11.96
4359
9458
17887
$ 0.00066864
That is a pretty linear drop in dollar-per-impression rate. Perhaps this is due to ad market fluctuations, or maybe WordPress is “incentivizing” increased viewership to maintain ad revenue. Who knows? Either way, it will be interesting to track this trend as timegoes on.
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MINI-RAMBLE: WORDADS – I THINK IT’S WORKING! Posted on January 5, 2018by ginbot86
2
Over a month has passed since my first postabout
seeing where the WordAds train will take me and my blog, and the first (meaningful) payout numbers have rolled out.CURRENT EARNINGS
WordAds earnings for 1/3 of November 2017, and all of December 2017. Not too bad – in 1 1/3 months, I’ve earned $20.20 USD in ad revenue. In December alone I earned $15.18 from 17,369 attempted ad impressions; with 9,732 views in December this equates to an impression-to-view ratio of 1.785. Assuming that I receive the same number of views per month, $15/month * 12 months = $180 USD/year. With this amount of revenue, MY BLOG CANFINALLY RUN ITSELF!
BLOG BUDGET BREAKDOWN _(YAY, ALLITERATION!)_ITEM
VALUE
Yearly Ad Revenue ($15 USD * 12 months)$ 180.00
Domain Name Registration (1 year for 3 domains, assuming CAD-to-USD conversion rate of 0.8x)$ (76.80)
G Suite (1 year, assuming CAD-to-USD conversion rate of 0.8x)$ (48.00)
FINAL BALANCE (USD)
$ 55.20
If I assume that my current view count doesn’t change, this would leave me with a little over $50 USD in pocket change by the end of the year. Perhaps this money could be put to use to buy some more things to make blog posts with – maybe some iPhone batteries or an eMMCmodule or two…
Once again, THANKS TO ALL OF MY READERS – I COULDN’T HAVE DONE ANY OF THIS WITHOUT YOU!SHARE THIS:
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PACKING BOXES & STOMACHS: EDIBLE FOAM PACKING PEANUTS?! Posted on December 20, 2017by ginbot86
2
Earlier today I picked up my replacement fire extinguisher from Kidde (check out the recall here)
and noticed the packing peanuts weren’t the pearlescent S-shaped Styrofoam peanuts I was used to seeing – rather, they looked like fluffier versions of Cheetos (cheese puffs). This piqued my curiosity… can you eat these? To see whether these were at least water-soluble, I poured a small amount of water on one of these peanuts, and it dissolved within seconds. Now that I’ve determined that these packing peanuts are indeed the biodegradable type, it’s time to take the taste test… A biodegradable (and edible!) foam packing peanut. … So, how do they taste? Perhaps surprisingly, they taste faintly of popcorn; I was expecting them to taste more unpleasant like cardboard, but these had a fairly agreeable yet neutral flavour and I suspect that they can be seasoned with a dry popcorn seasoning with little issue, but they may need a light spray of cooking oil in order to make the seasoning adhere tothe peanut.
There are multiple manufacturers of biodegradable packing peanuts (one example is Puffy Stuff ), and these are made from some form of starch like corn. However, these packing peanuts are basically devoid of any significant nutritional value, making them less attractive to animals and/or pests.Reference.com
says that they are not manufactured under food-safe conditions, and are therefore not recommended for human consumption. … I’m still going to eat these anyway. _*crunch munch*_SHARE THIS:
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SELF-DISCHARGE TEST OF KENTLI PH5 1.5V LI-ION AA (PART 5) Posted on November 28, 2017by ginbot86
2
It’s amazing – 894 days (and counting) have elapsed since the start of my long-term experiment, documenting the real-world self-discharge behavior of the Kentli 1.5V Li-ion AA battery… and it’s still ongoing! How have things fared so far? Kentli PH5 Voltage (Jun 18, 2015 – November 28, 2017) Kentli PH5 State of Charge (Jun 18, 2015 – November 28, 2017) Surprisingly, even after spending nearly 30 months on the shelf, there is still 12% capacity left. The voltage has dropped from 4.216 to 3.692 volts according to my bq27621 Li-ion fuel gauge; the State of Charge (SoC) has dropped 50% since my last update. The linear end date prediction is holding pretty steady, having changed slightly to an estimated 0% charge date somewhere in February2018.
On that note, I’m impressed by how much attention this little battery has received, even years after my initial review. Every day I see a handful of views checking out the teardown and performance metrics, and there seems to be hardly any sign that this will change anytime soon. To everyone who stops by to check out my blog posts:thank you!
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