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nothing (NaN).
ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
HELP WITH PSPICE
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
LTSPICE "STUCK" ON SIMULATION LTspice uses a simplified model for all of its MOSFETs. It models ON resistance and gate charge accurately, but pretty much ignores many of the other parameters in an effort to get the simulation to work fast. As Alec suggests, I strongly recommend you use the LTspice models. ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. NEED REPLACEMENT FOR THIS TRANSFORMER, KLIPSCH RPW-10 Hi all. I'm trying to repair the plate amplifier on a Klipsch rpw-10 sub. I took the speaker to a repair shop, which told me the transformer is bad. I get a power light but no output at all. I tried looking up the transformer via the label info but no luck. And Klipsch is no help. Can anyone IF STATEMENT ON LTSPICE In the .func statement, the "if" statement has to resolve to a number. I've added 0.5 at the end. In the "Limit" statement, I've added arbitrary Min and Max values, 0.1,12, respectively. A discontinuity will occur if not used because at the start of the simulation R equalsnothing (NaN).
ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
HELP WITH PSPICE
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
LTSPICE "STUCK" ON SIMULATION LTspice uses a simplified model for all of its MOSFETs. It models ON resistance and gate charge accurately, but pretty much ignores many of the other parameters in an effort to get the simulation to work fast. As Alec suggests, I strongly recommend you use the LTspice models. ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
HELP WITH PSPICE
Register. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. SIMULATING THE IDEAL OP AMP Apr 6, 2012. #2. The problem is the opamp symbol needs a model. You need to add the Spice directive ".lib opamp.sub". That includes the ideal op amp model. Zapper. Curmudgeon Elektroniker. --The important thing about having knowledge is knowing where it correctlyapplies..--.
RE-ACTIVATING COMPRESSORS AFTER POWER OUTAGE Hello, I was told by an electrician who works nearby that if an appliance which comprises a compressor (like refigerator, air-conditioner) is shut down (due to a sudden power outage for example), then it must not be re-activated during a ceratin period of time that follows the power outage.CAPACITOR CHOICES
Apr 30, 2016. #1. I have an electric cement mixer with a melted capacitor. It is CCB60 250V 40uF with operating temp 25/70/21. As a replacement I can find 40uF 250V 40/70/21 that is slightly undersized (70mm long instead of 80) or. 40uF 450V 25/70/21 (no size listed) A GOOD, MODERN ALTERNATIVE FOR LM386? Apr 21, 2010. #3. The LM386 is not an opamp, it is a little power amp (low power) with built-in biasing and built-in negative feedback. Most opamps and little power amps are inexpensive but we don't know which country you are in. You forgot to say what you need the opamp to do. CONVERT 24VAC TO 12VAC As the outdoor light requires 11W at 12v, that is nearly 1A of current. This means you need a high efficiency conversion of the 24vac 650ma source. This rules out using a restistive divider or similar arrangement where significant power will be lost. A 2:1 transformer with suitable current rating is most obvious, but may prove hard tosource.
MPLAB X CAN'T FIND INCLUDES I am working on some code and am having trouble with MPLAB X finding my config file. I made a test project to play with and it has the same issues. When I try to build it I get this output: CLEAN SUCCESSFUL (total time: 157ms) make -f nbproject/Makefile-default.mk SUBPROJECTS=.build-conf
LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. NEED REPLACEMENT FOR THIS TRANSFORMER, KLIPSCH RPW-10 Hi all. I'm trying to repair the plate amplifier on a Klipsch rpw-10 sub. I took the speaker to a repair shop, which told me the transformer is bad. I get a power light but no output at all. I tried looking up the transformer via the label info but no luck. And Klipsch is no help. Can anyone IF STATEMENT ON LTSPICE In the .func statement, the "if" statement has to resolve to a number. I've added 0.5 at the end. In the "Limit" statement, I've added arbitrary Min and Max values, 0.1,12, respectively. A discontinuity will occur if not used because at the start of the simulation R equalsnothing (NaN).
ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
HELP WITH PSPICE
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
CONVERT 24VAC TO 12VAC As the outdoor light requires 11W at 12v, that is nearly 1A of current. This means you need a high efficiency conversion of the 24vac 650ma source. This rules out using a restistive divider or similar arrangement where significant power will be lost. A 2:1 transformer with suitable current rating is most obvious, but may prove hard tosource.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. NEED REPLACEMENT FOR THIS TRANSFORMER, KLIPSCH RPW-10 Hi all. I'm trying to repair the plate amplifier on a Klipsch rpw-10 sub. I took the speaker to a repair shop, which told me the transformer is bad. I get a power light but no output at all. I tried looking up the transformer via the label info but no luck. And Klipsch is no help. Can anyone IF STATEMENT ON LTSPICE In the .func statement, the "if" statement has to resolve to a number. I've added 0.5 at the end. In the "Limit" statement, I've added arbitrary Min and Max values, 0.1,12, respectively. A discontinuity will occur if not used because at the start of the simulation R equalsnothing (NaN).
ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
HELP WITH PSPICE
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
CONVERT 24VAC TO 12VAC As the outdoor light requires 11W at 12v, that is nearly 1A of current. This means you need a high efficiency conversion of the 24vac 650ma source. This rules out using a restistive divider or similar arrangement where significant power will be lost. A 2:1 transformer with suitable current rating is most obvious, but may prove hard tosource.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. ALTERNATIVE TO LM2577-ADJ BUT MORE CURRENT NEEDED Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. WASHING MACHINE WITH CESET INDUCTION MOTOR (BRUSHLESS Hi there I have a Hotpoint Washer fitted with a super silent Induction motor. The label on the motor is: C.E.SET CIM 2/55-132/AD6 195 V - 3.7 A - 800 W - 290 Hz - 17000 RPM There s a couple of things I would like to know - is this motor 3phase or single phase?, is it an AC or DCmotor and
CONVERTING SOLAR TO MAINS Oct 5, 2014. #12. If you use the string that has 200 LEDs and it is powered for 8 hours from a single 1200mAh battery then each string of LEDs gets only 1200mAh/8 hours= 150mA at 1.2V and gets only (1.2V/3.5V) x 150mA= 51.4mA at the LED voltage of 3.5V. Then each LED gets only 51.4mA/200= 0.26mA which is extremely dim. SIMULATING THE IDEAL OP AMP Apr 6, 2012. #2. The problem is the opamp symbol needs a model. You need to add the Spice directive ".lib opamp.sub". That includes the ideal op amp model. Zapper. Curmudgeon Elektroniker. --The important thing about having knowledge is knowing where it correctlyapplies..--.
RE-ACTIVATING COMPRESSORS AFTER POWER OUTAGE Hello, I was told by an electrician who works nearby that if an appliance which comprises a compressor (like refigerator, air-conditioner) is shut down (due to a sudden power outage for example), then it must not be re-activated during a ceratin period of time that follows the power outage. CONVERT 24VAC TO 12VAC As the outdoor light requires 11W at 12v, that is nearly 1A of current. This means you need a high efficiency conversion of the 24vac 650ma source. This rules out using a restistive divider or similar arrangement where significant power will be lost. A 2:1 transformer with suitable current rating is most obvious, but may prove hard tosource.
CAPACITOR CHOICES
Apr 30, 2016. #1. I have an electric cement mixer with a melted capacitor. It is CCB60 250V 40uF with operating temp 25/70/21. As a replacement I can find 40uF 250V 40/70/21 that is slightly undersized (70mm long instead of 80) or. 40uF 450V 25/70/21 (no size listed) A GOOD, MODERN ALTERNATIVE FOR LM386? Apr 21, 2010. #3. The LM386 is not an opamp, it is a little power amp (low power) with built-in biasing and built-in negative feedback. Most opamps and little power amps are inexpensive but we don't know which country you are in. You forgot to say what you need the opamp to do. ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. CHARGING NIMH BATTERIES WITH NICAD CHARGER? What about the fact that the current discharge ability of Nimh is a fraction of NiCad, and that power tools are hi demand applications? You'll get drastically less torque due to the limited current sourcing ability of NiMH over Nicad, and lifespan from the larger pack will actually be lower overall because of it's internal resistance under load and the damage the heat in the cell will cause. ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. CHARGING NIMH BATTERIES WITH NICAD CHARGER? What about the fact that the current discharge ability of Nimh is a fraction of NiCad, and that power tools are hi demand applications? You'll get drastically less torque due to the limited current sourcing ability of NiMH over Nicad, and lifespan from the larger pack will actually be lower overall because of it's internal resistance under load and the damage the heat in the cell will cause. LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. DEFINITIVE TECHNOLOGY SUBWOOFER REPAIR Jan 25, 2021. #1. I have a Definitive Technology compact subwoofer that went belly-up and started buzzing constantly instead of producing any sound. After research, I decide to try replacing the primary 6800uf 80v capacitors . After replacing the caps, the behavior has changed, but not really for the better. Instead of getting a constantbuzz
PLACEMENT OF FILTER
Hello there First of all, I am thinking of providing protection for a sensitive card I have in my hand. this board works with 5v and requires about 1 amp current. This sensitive board include FPGA and some analog circuitry inside of it. For this board i want to make some protection via small CALCULATING TEMPERATURE RISE OF A RESISTOR Long story short, I have a load bank using resistors. To get the right vale resistors, there are various combinations of 1-4 resistors in combinations of up to two parallel pairs in series. In particular, one load option is deisgn for 4 volts at 160mA (25 ohms) It actually consists of a 10 ohm CHARGE VOLTAGE FOR NICAD BATTERY PACK. Specs for the ultimate charger are: 1. Soft start. If the temperature is above 40 degrees C or below zero degrees C start with a C/10 charge. If the discharged battery voltage is less than 1.0 Volts/cell start with a C/10 charge. If the discharged battery voltage is above 1.29 V/cell start with a C/10 charge. SELECTION OF POTENTIOMETER VALUE Can any one help to as to how to select the potentiometer of correct rating. I have 22,3 V (max) of supply from solar panel which is connected to zener diode circuit with parallel resistor of 1 k ohm to zener diode (3.0V) and parallel to zener diode is another resistor of 820 ohm which is connected to the photo transistor (BPX38-3 OSO) with Vce = 50 V, Vbe= 7 V maximum values. SIMULATING THE IDEAL OP AMP Apr 6, 2012. #2. The problem is the opamp symbol needs a model. You need to add the Spice directive ".lib opamp.sub". That includes the ideal op amp model. Zapper. Curmudgeon Elektroniker. --The important thing about having knowledge is knowing where it correctlyapplies..--.
ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
DIFFERENT TYPES OF D BATTERIES? I measured the current through a 50 ohm resistor with both types and they both read 32mA. After closer inspection, the new batteries are Energizer D size-E95 LR20-AM1-1.5V and the old ones are Panasonic UM-1NP 1.5V. The Energizers say alkaline and the Pansonics say "Super Heavy Duty". I'm assuming for some reason the Panasonics can't provide SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
NEW SPICE MODEL FOR CD4046B PHASE-LOCKED LOOP IC The current Yahoo LTspice User Group's model does not model the VCO section fully, so I home-brewed one which better reflects the functionality as set out in the Texas Instrument Application Report SCHA002A and the datasheet. I've uploaded the model and ancillary files to the User Group, but HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
NEW SPICE MODEL FOR CD4046B PHASE-LOCKED LOOP IC The current Yahoo LTspice User Group's model does not model the VCO section fully, so I home-brewed one which better reflects the functionality as set out in the Texas Instrument Application Report SCHA002A and the datasheet. I've uploaded the model and ancillary files to the User Group, but HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. DEFINITIVE TECHNOLOGY SUBWOOFER REPAIR Jan 25, 2021. #1. I have a Definitive Technology compact subwoofer that went belly-up and started buzzing constantly instead of producing any sound. After research, I decide to try replacing the primary 6800uf 80v capacitors . After replacing the caps, the behavior has changed, but not really for the better. Instead of getting a constantbuzz
SELECTION OF POTENTIOMETER VALUE Can any one help to as to how to select the potentiometer of correct rating. I have 22,3 V (max) of supply from solar panel which is connected to zener diode circuit with parallel resistor of 1 k ohm to zener diode (3.0V) and parallel to zener diode is another resistor of 820 ohm which is connected to the photo transistor (BPX38-3 OSO) with Vce = 50 V, Vbe= 7 V maximum values. IF STATEMENT ON LTSPICE In the .func statement, the "if" statement has to resolve to a number. I've added 0.5 at the end. In the "Limit" statement, I've added arbitrary Min and Max values, 0.1,12, respectively. A discontinuity will occur if not used because at the start of the simulation R equalsnothing (NaN).
CALCULATING TEMPERATURE RISE OF A RESISTOR Long story short, I have a load bank using resistors. To get the right vale resistors, there are various combinations of 1-4 resistors in combinations of up to two parallel pairs in series. In particular, one load option is deisgn for 4 volts at 160mA (25 ohms) It actually consists of a 10 ohm HOW TO CHANGE THE Y AXIS IN LTSPICE The independent variable of the simulation is the Voltage of V1, which sweeps linearly from 0V to 10V, and is the X-Axis in the plot. I have plotted three dependent variables; the diode voltage V (d), the current through the diode I (D1), and the power dissipated in the resistor (green expression). These are plotted on the Y-Axis. DIFFERENT TYPES OF D BATTERIES? I measured the current through a 50 ohm resistor with both types and they both read 32mA. After closer inspection, the new batteries are Energizer D size-E95 LR20-AM1-1.5V and the old ones are Panasonic UM-1NP 1.5V. The Energizers say alkaline and the Pansonics say "Super Heavy Duty". I'm assuming for some reason the Panasonics can't provide HOW TO USE LM317 LTSPICE MODEL Jul 28, 2009. #2. You need four things to make it work. First, the attribute on the symbol has to match the modelName/subscircuitName. Second, you have to have a .Include statement somewhere on the schematic which has the file name of the library containing the model/subscircuit netlist. Third, the file containing the model/subscircuit netlist HOW TO COPY PROJECT IN MPLAB X??? Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. RS232 TX, RX & GND WIRE COLORS? As far as I know, there are no colour standards for wiring in regards to RS232 implementations, only pin assignments. A lot of people (including myself) wire DB9 connectors to mimic a guideline colour scheme used for RS232 on RJ45 (EIA-561). ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
NEW SPICE MODEL FOR CD4046B PHASE-LOCKED LOOP IC The current Yahoo LTspice User Group's model does not model the VCO section fully, so I home-brewed one which better reflects the functionality as set out in the Texas Instrument Application Report SCHA002A and the datasheet. I've uploaded the model and ancillary files to the User Group, but HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. CHARGING NIMH BATTERIES WITH NICAD CHARGER? What about the fact that the current discharge ability of Nimh is a fraction of NiCad, and that power tools are hi demand applications? You'll get drastically less torque due to the limited current sourcing ability of NiMH over Nicad, and lifespan from the larger pack will actually be lower overall because of it's internal resistance under load and the damage the heat in the cell will cause. ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
NEW SPICE MODEL FOR CD4046B PHASE-LOCKED LOOP IC The current Yahoo LTspice User Group's model does not model the VCO section fully, so I home-brewed one which better reflects the functionality as set out in the Texas Instrument Application Report SCHA002A and the datasheet. I've uploaded the model and ancillary files to the User Group, but HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. CHARGING NIMH BATTERIES WITH NICAD CHARGER? What about the fact that the current discharge ability of Nimh is a fraction of NiCad, and that power tools are hi demand applications? You'll get drastically less torque due to the limited current sourcing ability of NiMH over Nicad, and lifespan from the larger pack will actually be lower overall because of it's internal resistance under load and the damage the heat in the cell will cause. LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. DEFINITIVE TECHNOLOGY SUBWOOFER REPAIR Jan 25, 2021. #1. I have a Definitive Technology compact subwoofer that went belly-up and started buzzing constantly instead of producing any sound. After research, I decide to try replacing the primary 6800uf 80v capacitors . After replacing the caps, the behavior has changed, but not really for the better. Instead of getting a constantbuzz
SELECTION OF POTENTIOMETER VALUE Can any one help to as to how to select the potentiometer of correct rating. I have 22,3 V (max) of supply from solar panel which is connected to zener diode circuit with parallel resistor of 1 k ohm to zener diode (3.0V) and parallel to zener diode is another resistor of 820 ohm which is connected to the photo transistor (BPX38-3 OSO) with Vce = 50 V, Vbe= 7 V maximum values. IF STATEMENT ON LTSPICE In the .func statement, the "if" statement has to resolve to a number. I've added 0.5 at the end. In the "Limit" statement, I've added arbitrary Min and Max values, 0.1,12, respectively. A discontinuity will occur if not used because at the start of the simulation R equalsnothing (NaN).
CALCULATING TEMPERATURE RISE OF A RESISTOR Long story short, I have a load bank using resistors. To get the right vale resistors, there are various combinations of 1-4 resistors in combinations of up to two parallel pairs in series. In particular, one load option is deisgn for 4 volts at 160mA (25 ohms) It actually consists of a 10 ohm HOW TO CHANGE THE Y AXIS IN LTSPICE The independent variable of the simulation is the Voltage of V1, which sweeps linearly from 0V to 10V, and is the X-Axis in the plot. I have plotted three dependent variables; the diode voltage V (d), the current through the diode I (D1), and the power dissipated in the resistor (green expression). These are plotted on the Y-Axis. DIFFERENT TYPES OF D BATTERIES? I measured the current through a 50 ohm resistor with both types and they both read 32mA. After closer inspection, the new batteries are Energizer D size-E95 LR20-AM1-1.5V and the old ones are Panasonic UM-1NP 1.5V. The Energizers say alkaline and the Pansonics say "Super Heavy Duty". I'm assuming for some reason the Panasonics can't provide HOW TO USE LM317 LTSPICE MODEL Jul 28, 2009. #2. You need four things to make it work. First, the attribute on the symbol has to match the modelName/subscircuitName. Second, you have to have a .Include statement somewhere on the schematic which has the file name of the library containing the model/subscircuit netlist. Third, the file containing the model/subscircuit netlist HOW TO COPY PROJECT IN MPLAB X??? Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. RS232 TX, RX & GND WIRE COLORS? As far as I know, there are no colour standards for wiring in regards to RS232 implementations, only pin assignments. A lot of people (including myself) wire DB9 connectors to mimic a guideline colour scheme used for RS232 on RJ45 (EIA-561). SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
CALCULATING TEMPERATURE RISE OF A RESISTOR Long story short, I have a load bank using resistors. To get the right vale resistors, there are various combinations of 1-4 resistors in combinations of up to two parallel pairs in series. In particular, one load option is deisgn for 4 volts at 160mA (25 ohms) It actually consists of a 10 ohmHELP WITH PSPICE
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free.CAPACITOR CHOICES
Apr 30, 2016. #1. I have an electric cement mixer with a melted capacitor. It is CCB60 250V 40uF with operating temp 25/70/21. As a replacement I can find 40uF 250V 40/70/21 that is slightly undersized (70mm long instead of 80) or. 40uF 450V 25/70/21 (no size listed) SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
CONVERT 24VAC TO 12VAC As the outdoor light requires 11W at 12v, that is nearly 1A of current. This means you need a high efficiency conversion of the 24vac 650ma source. This rules out using a restistive divider or similar arrangement where significant power will be lost. A 2:1 transformer with suitable current rating is most obvious, but may prove hard tosource.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. SCHEMATIC TO BUILD A 4MA-20MA SUPPLY I would like to build a circuit using a 24VDC power supply that would give me an output of 4-20ma or wider range to supply the loop power to manually control a valve while a new controler is installed. My initial idea is to use a 24VDC Omron power supply with a 5K pot and a1.2K resistor. I
HOW DOES THIS WORK? ITS BLACK MAGIC. LED WORKING FROM 120V I was looking for the smallest simplest way to power an LED from USA household current which is 120 volts AC. At the dollar store I found an LED night light and opened it up expecting to see a tiny transformer or something to power the led but instead I found this: . I am dumb founded how to SEND EMAIL (SSL) WITH SIM800 OR SIM900 GSM MODULES I tried to configure CDNSCFG to email server IP address (also requires you to turn on PDP context) but no change. If there is anyone who has successfully used SIM800 to send/read emails please let us know. because so far I know no one. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
CALCULATING TEMPERATURE RISE OF A RESISTOR Long story short, I have a load bank using resistors. To get the right vale resistors, there are various combinations of 1-4 resistors in combinations of up to two parallel pairs in series. In particular, one load option is deisgn for 4 volts at 160mA (25 ohms) It actually consists of a 10 ohmHELP WITH PSPICE
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free.CAPACITOR CHOICES
Apr 30, 2016. #1. I have an electric cement mixer with a melted capacitor. It is CCB60 250V 40uF with operating temp 25/70/21. As a replacement I can find 40uF 250V 40/70/21 that is slightly undersized (70mm long instead of 80) or. 40uF 450V 25/70/21 (no size listed) SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
CONVERT 24VAC TO 12VAC As the outdoor light requires 11W at 12v, that is nearly 1A of current. This means you need a high efficiency conversion of the 24vac 650ma source. This rules out using a restistive divider or similar arrangement where significant power will be lost. A 2:1 transformer with suitable current rating is most obvious, but may prove hard tosource.
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. NTC THERMISTOR RESISTANCE CALCULATOR V2.0 NTC Thermistor Resistance Calculator V2.0. NTC Thermistor Resistance Calculator V2.0. Enter Thermistor Datasheet Values. Rnew=R0*exp-B* ( (1/273+Tref)- (1/273+Tnew)) Thermistor Beta Value: Resistance at Ref Temperature, Ohms: Reference Temperature, Cdeg: Target Temperature,Cdeg:
CALCULATING TEMPERATURE RISE OF A RESISTOR Long story short, I have a load bank using resistors. To get the right vale resistors, there are various combinations of 1-4 resistors in combinations of up to two parallel pairs in series. In particular, one load option is deisgn for 4 volts at 160mA (25 ohms) It actually consists of a 10 ohm LM7805 "SPICE MODEL" Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. CONVERT 24VAC TO 12VAC As the outdoor light requires 11W at 12v, that is nearly 1A of current. This means you need a high efficiency conversion of the 24vac 650ma source. This rules out using a restistive divider or similar arrangement where significant power will be lost. A 2:1 transformer with suitable current rating is most obvious, but may prove hard tosource.
ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
BLOCKING DIODE?
As I stated earlier, the starting circuit (including the ground connection from engine block to negative poles on the batteries) requires a minimum of #2awg. I use #0awg for the Chev V8 in my boat. Last edited: Dec 29, 2016. I am an engineer and an academic. When I talk about current it flows from positive to negative. SUPER CAPACITOR WITH REAL TIME CLOCK Hi all, I am designing a real time clock circuit (RTC) and using a super capacitor as a back up power supply. The RTC I am using is PCF8563, and I am using a 3.3V super capacitor (DMS3R3224). The connection is as shown in the image below: Is this the right way to connect up the super CHARGING NIMH BATTERIES WITH NICAD CHARGER? What about the fact that the current discharge ability of Nimh is a fraction of NiCad, and that power tools are hi demand applications? You'll get drastically less torque due to the limited current sourcing ability of NiMH over Nicad, and lifespan from the larger pack will actually be lower overall because of it's internal resistance under load and the damage the heat in the cell will cause. A GOOD, MODERN ALTERNATIVE FOR LM386? Apr 21, 2010. #3. The LM386 is not an opamp, it is a little power amp (low power) with built-in biasing and built-in negative feedback. Most opamps and little power amps are inexpensive but we don't know which country you are in. You forgot to say what you need the opamp to do. CONVERTING SOLAR TO MAINS Oct 5, 2014. #12. If you use the string that has 200 LEDs and it is powered for 8 hours from a single 1200mAh battery then each string of LEDs gets only 1200mAh/8 hours= 150mA at 1.2V and gets only (1.2V/3.5V) x 150mA= 51.4mA at the LED voltage of 3.5V. Then each LED gets only 51.4mA/200= 0.26mA which is extremely dim. ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. NEW SPICE MODEL FOR CD4046B PHASE-LOCKED LOOP IC The current Yahoo LTspice User Group's model does not model the VCO section fully, so I home-brewed one which better reflects the functionality as set out in the Texas Instrument Application Report SCHA002A and the datasheet. I've uploaded the model and ancillary files to the User Group, but HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
CAPACITOR CHOICES
Apr 30, 2016. #1. I have an electric cement mixer with a melted capacitor. It is CCB60 250V 40uF with operating temp 25/70/21. As a replacement I can find 40uF 250V 40/70/21 that is slightly undersized (70mm long instead of 80) or. 40uF 450V 25/70/21 (no size listed) ETHERNET TERMINATION RESISTORS There should be a 50 source impedance, a 50 ohm characteristic impedance of the transmission line, and a 50 ohm termination resistance. Is it because Ethernet is a differential pair you need a bi-directional 100 ohm differential termination at both ends (2x 50 ohms). Thanks in advance. SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
CHARGING NIMH BATTERIES WITH NICAD CHARGER? What about the fact that the current discharge ability of Nimh is a fraction of NiCad, and that power tools are hi demand applications? You'll get drastically less torque due to the limited current sourcing ability of NiMH over Nicad, and lifespan from the larger pack will actually be lower overall because of it's internal resistance under load and the damage the heat in the cell will cause. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. ELECTRONICS FORUM (CIRCUITS, PROJECTS AND MICROCONTROLLERS)FORUMSWHAT'S NEWARTICLESMEMBERSNEW MEDIANEW RESOURCES Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. NEW SPICE MODEL FOR CD4046B PHASE-LOCKED LOOP IC The current Yahoo LTspice User Group's model does not model the VCO section fully, so I home-brewed one which better reflects the functionality as set out in the Texas Instrument Application Report SCHA002A and the datasheet. I've uploaded the model and ancillary files to the User Group, but HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
ANTENNA FOR A GARAGE DOOR OPENER. My garage door opener has a 433 MHz receiver. But it only has a simple wire antenna so I need to be close to the garage in order to open or close the door from the car. I would like to make an antenna that has some gain. But I'm wondering how to match the antenna to the receiver.Any advice
CAPACITOR CHOICES
Apr 30, 2016. #1. I have an electric cement mixer with a melted capacitor. It is CCB60 250V 40uF with operating temp 25/70/21. As a replacement I can find 40uF 250V 40/70/21 that is slightly undersized (70mm long instead of 80) or. 40uF 450V 25/70/21 (no size listed) ETHERNET TERMINATION RESISTORS There should be a 50 source impedance, a 50 ohm characteristic impedance of the transmission line, and a 50 ohm termination resistance. Is it because Ethernet is a differential pair you need a bi-directional 100 ohm differential termination at both ends (2x 50 ohms). Thanks in advance. SAFETY INTERLOCK MODULE Oct 30, 2003. #1. I need a safety interlock module for an old lawn mower. The module is no longer available. The module senses if the brake swithch and seat switch & ect. are ingaged or not inguaged. For example, if you are not on the seat and if the brake is not set the interlock module will activate the kill switch and not allow you tostart.
CHARGING NIMH BATTERIES WITH NICAD CHARGER? What about the fact that the current discharge ability of Nimh is a fraction of NiCad, and that power tools are hi demand applications? You'll get drastically less torque due to the limited current sourcing ability of NiMH over Nicad, and lifespan from the larger pack will actually be lower overall because of it's internal resistance under load and the damage the heat in the cell will cause. ELECTRICAL FLOOR GRID TO KILL RATS PLEASE Ok I know i will get flogged for this 'unsafe' method of killing my backyard varmints. but please just go with it. I already tried spring traps, buckets, cages, rat poison. what i kind of learned is they are not interested in my food bait since they have alternate food source,palm fruits, etc
ELECTROCUTION DEVICE FOR RATS Jun 6, 2005. #8. You don't need much to kill. 120V dc or 50V ac is enough to kill a human. Just having pads on the ground connected to mains is enough to kill. Rats are very clever though, they are not lemmings, kill one and the rest will find a new way. HOW TO PROPERLY GROUND A GARAGE OR SHED.... I know this isn't the general kind of question asked here, but I figure it's worth a shot. We bought an older house, and the house is grounded normally. At some time, someone ran electrical wires to the garage, which is about 80 ft away. 2 wires, run from the breaker, tothe garage roof
IF STATEMENT ON LTSPICE In the .func statement, the "if" statement has to resolve to a number. I've added 0.5 at the end. In the "Limit" statement, I've added arbitrary Min and Max values, 0.1,12, respectively. A discontinuity will occur if not used because at the start of the simulation R equalsnothing (NaN).
STARTER MOTOR. AMPS? A starter motor from a normal 2 Litre petrol car draws between 60 and 200 Amps when turning over the engine when the oil is warm and thin. Under winter conditions, this current can easily double when the oil is thick. Diesel engines have a very high compression ratio e.g. 22:1 and require more powerfull starter motors. 8 BIT BINARY TO BCD CIRCUIT Hi, You need to use 3 displays to represent 0-255 in an 8bit binary value. If you want to use 2 displays you have a hex-display (0-F). For that you need no conversion, just shift the nibbles. If you want to convert a binary value to3x 7-segment, I would use a table lookup cheme. 2 (1.5) bytes for each value. LTSPICE CURRENT VS VOLTAGE GRAPH Dec 1, 2018. #4. Below is a example simulation where the Horizontal axis is changed as shown (by left-clicking on the axis) and the Vertical axis, generated by left-clicking on D1 (not right-click as Mike stated) is changed to logarithmic so that the logarithmic relation between current and voltage of a diode appears as (nearly) astraight line:
BLOCKING DIODE?
Hi Tony, The diode would need to be rated to carry the current taken by what you are calling the basic lights. These would be fed directly from the side of the switch that powered just these lights and via the diode from the side of the switch that was connected to the side of the switch for the extra lights (Which you say take a maximum of 5amps.)
120 VOLT OUTLETS READING 240 Diver300. It could be that the neutral has broken somewhere, and that there is a large, (so low resistance) load between the opposite phase and neutral. That would pull the neutral to nearly 120V in the opposite direction to your 120 V feed. That would be just about 240 V from your live to what neutral is at the moment. CONVERTING SOLAR TO MAINS Oct 5, 2014. #12. If you use the string that has 200 LEDs and it is powered for 8 hours from a single 1200mAh battery then each string of LEDs gets only 1200mAh/8 hours= 150mA at 1.2V and gets only (1.2V/3.5V) x 150mA= 51.4mA at the LED voltage of 3.5V. Then each LED gets only 51.4mA/200= 0.26mA which is extremely dim. VOLTAGE DROP OF 1N4007 DIODE 0.3 V ? So I am measuring the voltage with the multimeter and diode in series with a 9V battery. The reading is 9.01 V whereas with multimeter directly across the battery, the reading is 9.41 volts. So the voltage drop comes out to be 0.3 V. But shouldnt it be 0.7 V for 1N4007 is asilicon diode ?
A GOOD, MODERN ALTERNATIVE FOR LM386? Apr 21, 2010. #3. The LM386 is not an opamp, it is a little power amp (low power) with built-in biasing and built-in negative feedback. Most opamps and little power amps are inexpensive but we don't know which country you are in. You forgot to say what you need the opamp to do.__ Menu
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