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The most recent discussions

Solar Charging Night Light not working


May 25, 2020, 8:50 pm

Hi all, I am trying to implement a very simple solar charged night garden light. Schematics is here: https://www.jameco.com/Jameco/workshop/JamecoFavorites/solarled.html Basically a solar panel ch... Read more »

Flux density


May 24, 2020, 4:47 am

Reviewing stuff I forgot during lockdown, this is one thing I never got. H is amp-turns/meter, and having distance in the denominator suggests that it is also a measure of flux density (but withou... Read more »

Small generator over-voltage


May 16, 2020, 3:07 pm

If there's a better site/forum for this question, please let me know. I have an old (mid 80's) Sears Craftsman generator - 4 cycle B&S engine & 120v, 1350W rated output. (Jeff - model 580.328172)... Read more »

Why does my server's redundant supply only have 12V?

  [ 2 ]
April 23, 2020, 3:07 pm

It's an old Dell R410, with supplies DPS-500RB (12V only) and D480E-S0 (12/5/3.3V). If the second one died, the first one can't make the server still run, as there's no 5V or 3.3V! Read more »

iPhone SUPER discounts


April 20, 2020, 6:57 pm

*** iPhone SUPER-SPECIAL-DISCOUNT 80% OFF --- UNBEATABLE SUPER-PRICES !!! *** Save LOTS OF CASH on a wide collections of iPhones, 80% off everything must go to make place of next generation iPhone ... Read more »

Power supply current?

  [ 2 ]
April 9, 2020, 4:12 pm

I wish to buy a power supply delivering up to 500V for experiments with thermionic valves. What would be a suitable current? Read more »

I got a box of old parts, any chance any of it is useful?


March 11, 2020, 6:12 pm

At a fundraising event I found a very nice wood box in the electronics section. It has what appears to be a broken decades old multimeter at the top, and drawers full of parts below. There are a co... Read more »

Transistor testing


March 4, 2020, 5:10 pm

I have some BC547 transistors which I want to use in a circuit, but according to this: Hook the positive lead from the multimeter to the to the EMITTER (E) of the transistor. Hook the negative m... Read more »

Wireless phone charger


February 24, 2020, 5:27 pm

Just for fun I thought I would make a wireless phone charger. I'm not reall y going to use it but I wanted to build it and just see if it actually work ed. The circuit uses two coils and a 2n222 tr... Read more »

Does a parrot's foot conduct electricity?

  [ 2 3 4 ]
February 21, 2020, 8:56 pm

My pet parrot has a habit of chewing wires but never got a shock. I tested her feet with a multimeter and it was over 20Mohms. My own dry finger is 1Mohm. Are they safe from shocks due to scaly feet?... Read more »

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The best rated discussions

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5

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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5

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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5

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 »

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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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5

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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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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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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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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Electronic parts sites


I am looking for sites that sell electronic components. I have Jameco, but they don't have a lot of components. Thanks, Andy Read more »

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UCANDO videos


If anyone has any old ucando videos on the subject of AC or DC or power supplies or amplifiers or any basic stuff and you want to sell them, at a resonable used price, I'd be interested. I'm just ... Read more »