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There are 100282 individual articles here that are part of 9297 discussions
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The most recent discussions

PID tuning. Lag = ~ integrating time


April 24, 2017, 7:29 pm

Hi all, this is not so much a question, as me just spouting. If I do say (spout) something wrong, or that you disagree with or that you don't understand, then please do speak up. I've been tu... Read more »

Thermopile power supply in water heater control


April 19, 2017, 1:57 am

I recently bought a gas water heater and made a point of getting one that didn't require external electrical power to operate. To my astonishment, it nonetheless came with what behaves like a digi... Read more »

one transistor amplifier help

  [ 2 ]
April 15, 2017, 3:18 pm

I have the following amp. It originally had a 12V supply voltage, In an effort to get a larger swing on the output, I raised that to 24V. I now get 12.5Vpp on the output, I want to maximize ... Read more »

'K' type thermocouple wire connecting to meter - a question


April 14, 2017, 5:23 pm

I have a meter with K type thermocouple. The wire welded blob at the measuring tip is discoloured from the manufacture but apart from that there is no visible insulation at all to keep the two di... Read more »

Mystery component marking


April 12, 2017, 4:40 am

I have two versions of the same USB adapter module. One has what I believe is an SMD jumper marked 000. At the same place in the other version, the item is marked T05. Is that also a jumper? ... Read more »

Slip ring questions


April 12, 2017, 12:15 am

I'm sure someone here can help. I need to get power to a solenoid operated valve spinning at 5000 RPM. Low power, 24 volts at 5 watts. The power will be on for about 4 seconds and off for 7 second... Read more »

Variac question


April 5, 2017, 3:14 pm

All, I have two variacs, one is the typical type that does not isolate the load from the mains. The other one I have isolates the load. When I use the isolated one to power an inductive load, like... Read more »

contact surface material


April 3, 2017, 3:03 am

I made an exposed lid switch consisting of two mating pairs of flat brass s tock about 1 x 1/2 inches. When I close the lid they make contact and 12VDC flows into 2.5 ohms worth of nichrome heatin... Read more »

Bnc impedance

  [ 2 ]
April 2, 2017, 9:10 pm

So I am using rg 62 coax which is 92 ohm. My BNC connectors are 75ohm.all my equipment inputs and outputs are 92ohm. Do I need to use 92ohm terminators on all my T's and where,at the source or load? ... Read more »

Ground is no longer at ground potential

  [ 2 ]
April 1, 2017, 2:32 pm

Scientists have determined that ground is no longer at ground potential. It dont matter if you're referring to the ground for your home's electrical system, or the chassis ground in an electronic d... Read more »

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The best rated discussions

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Soldering Copper to Phosphor Bronze


Does anyone know if soldering copper wire to Phosphor-Bronze make a solid and reliable electrical connection? Would it make much of a difference if the copper wire is stranded or solid? If there is a... Read more »

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Software for PIC 16F876


Hello, I want to built a simple datalogger with a PIC 16F876, and found a nice schema on the net. My problem: te software (source) is written in C, but i need a hex files to program the PIC processor... Read more »

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Where to buy a small wheel hub motor?


Specifically, where can I buy a high quality small wheel hub motor (with wheel) like the one used for powered Trikkes? http://www.trikke.com/hd_2/Refurbished-Trikkes/Tribred-E-Kit-Upgrade http://www... Read more »

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Best Light for reading?


When choosing a Flourescent Bulb for a Task Light what is the best for reading.......my choices are 2700 Kelvin, 3000, 3500, or 4100..... Read more »

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Questions in regard to Art of Electronics


I recently started teaching myself electronics in my spare time with the help of The Art of Electronics and its student manual. I have worked my way through the first chapters, but I have some questi... Read more »

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How do you test a capacitor?

  [ 2 ]

Just bought a generator and it failed within two hours of usage. Mfg. say maybe capacitor and will ship a new one. But am not sure. I have a voltmeter with capacitor readings. Know how to test for re... Read more »

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Thought experiment-will this work?


I think I pretty much understand how induction motors work. A typical single phase motor has a start winding that is approximately in quadrature electrically to the run winding. This provides the p... Read more »

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HC08 development under Linux


I've always been singularly impressed by the people who can make lights blink and robots roll and whatnot. I've been trying a foray into that world for about a month now on and off with the apparen... Read more »

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Satellite radio - radio validation


I'm curious, can someone provide a simple several paragraph, basic explanation of how satellite radio authentication works? eg. If the radio is only a receiver and I cancel my subscription how does ... Read more »

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will shortening a soldering iron heating rod cause a problem?


I need to shorten the end of my solder iron so i have more control of direction and make it more like a pen.....can i cut it down so my fingers are nearer the tip without causing a problem.....though... Read more »