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There are 101847 individual articles here that are part of 9413 discussions
Please see below the list of the most recent and the best rated articles in Hobby Electronics Basics

The most recent discussions

MOSFET switch - sanity check

August 13, 2018, 5:40 pm

I have a Milwaukee 12v variable speed tool with a bad control board. Rather than replace the board, I'm planning to just use a switch for single (full) speed. But the switches that I have & will... Read more »

Re: film vs CMOS

August 11, 2018, 7:47 pm

On Sun, 12 Aug 2018 00:54:04 +0800, Mr. Man-wai Chang You'd have to compare the format size of film. 70 mm film is probably better than most digital cameras can resolve. (excluding some spacecra... Read more »

Transformerless power supply

August 10, 2018, 5:24 pm

Is it reasonable/possible to build an 8 amp 20 V transformerless power supply from a 120Vac line. I calculate about 180uf plus or minus depending on other components. Maybe 9- 20uf caps in pa... Read more »

Is Class 1 laser safe enough for baby eyes?

July 31, 2018, 10:21 am

I meant, what if someone accidentally shine Class 1 laser into a baby's eyes? Would it hurt retina and leave a permanent damage? I know ... I know... it should NOT happen. Adults are supposed to b... Read more »

Formula for calculating run time of apc ?

July 30, 2018, 9:06 pm

I am looking for a formula for calculating the run time of my APC battery system. I did a search but what I found required a particular model of apc. Total watts of computer and monitor is about 12... Read more »

An idea that may be of some use

July 20, 2018, 2:52 pm

I needed a small light to light some steps from my deck to the ground and in a few other places. I already had a 12V system outside. For a cheap and dirty light I took a plastic test tube (ebay/... Read more »

three terminal volt regulator

July 12, 2018, 4:34 pm

Hi all, Simple question. Some 1/2 amp LM7805 is obselete (TO-220 pac) I need a replacement. So either a 1 amp 7805 http://www.onsemi.com/pub/Collateral/MC7800-D.PDF or a LM340 http://www.ti.co... Read more »

mosfet bias question

July 8, 2018, 7:22 pm

I plan to use a mosfet in a dawn to dusk switching circuit with a 12V regulated power supply. In the application notes they give the gate source absolute maximum voltage as +/- 10V Gate to Source.... Read more »

sci.electronics.basics, Would You Like To Actually Participate In A Design ...

July 5, 2018, 6:41 am

This is an ESR detector for caps, electrolytics mainly that cause so many o f the problems in electronic equipment. This is not meant to be a lab quali ty instrument, it is mew=ant to be a fast way... Read more »

juice the movie

June 25, 2018, 2:08 pm

http://juicethemovie.com/ Looks interesting. -- John Larkin Highland Technology, Inc lunatic fringe electronics Read more »

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The best rated discussions


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 »


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 »


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 »


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 »


Max Frequency of SM 118A counter?

  [ 2 3 ]

Anyone know the maximum frequency of a Heathkit SM-118A? I have been all over Google with little luck. One guy said it would go to 1 GHz maybe 2 GHz, I don't think so. ... Read more »


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 »


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 »


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 »


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 »


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 »