Hobby Electronics Basics

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Wikipedia: threat or menace?

So while reading up on air-core inductors I encountered three formulae for calculating the inductance of cylindrical in...
19 comments posted 13yrs
posted by stevet810
19 comments posted 13yrs posted by stevet810

Ping uncle steve

Hey, I took time out of my life in order to address your concerns, provided a solution for you with respect to the "Tra...
8 comments posted 13yrs
posted by jfields
8 comments posted 13yrs posted by jfields

Transistors

Ok, this is a question that is not so battery-charger specific, but is obviously related. So here's a circuit fragment:...
60 comments posted 13yrs
posted by stevet810
60 comments posted 13yrs posted by stevet810

Monostable circuit with ne555

ne555 monostable circuit is very easy to prepare. Now there is online simulation as well as corresponding tutorial. htt...
0 comments posted 13yrs
posted by pchung705
0 comments posted 13yrs posted by pchung705

Testing machine errors with MCU based device

Hi. I want to monitor state of machine ( e.g. pump state, pressure, water level etc. ) with my MCU based controller/dev...
9 comments posted 13yrs
posted by igor
9 comments posted 13yrs posted by igor

Whole house fan motor

Just recently purchased a house and it has a whole house fan. Unfortunately, the folks who installed the A/C disconnect...
67 comments posted 13yrs
posted by telengard
67 comments posted 13yrs posted by telengard

Ozone source?

I keep a small quantity of rubber bands in my garage that degrade rapidly. They crack and fall apart in ~2 months. The...
7 comments posted 13yrs
posted by perilmung
7 comments posted 13yrs posted by perilmung

comments on this DC power supply?

I came across this item, which looks like a pretty good deal to me. http://www.mindsetsonline.co.uk/product_info.php?pro...
1 comments posted 13yrs
posted by a24061
1 comments posted 13yrs posted by a24061

More about special timing device

Thinking (I know, it's dangerous) this afternoon about my need for a special timing device led me to stop watches. If t...
4 comments posted 13yrs
posted by etpm
4 comments posted 13yrs posted by etpm

Small signal RF amplifier ideas?

Some ideas I hear about RF amps are to decouple each stage with a series resistor and a cap across the stage. The resis...
2 comments posted 13yrs
posted by bperryb
2 comments posted 13yrs posted by bperryb

Need help with oven schematic

Here is a link for the schematic of my old (1985±) Jenn-air wall oven (si ngle)....
6 comments posted 13yrs
posted by ivanvegvary
6 comments posted 13yrs posted by ivanvegvary

PSpice Netlisting/Template Trick

Just discovered (or re-remembered :-), in PSpice... To just have the color of an LED showing in the schematic (I hate o...
7 comments posted 13yrs
posted by To-Email-Use-The-Envelope-Icon
7 comments posted 13yrs posted by To-Email-Use-The-Envelope-Icon

Telephone parts?

One of the discounters in Portland is selling "slim-line" phones (land line, brand new) for $ 2.50 each. Is this a barga...
5 comments posted 13yrs
posted by ivanvegvary
5 comments posted 13yrs posted by ivanvegvary

I need to make a special measuring timer

Greetings All, I have a customer that I make an assembly for that he uses in another assembly to stake parts. By stakin...
22 comments posted 13yrs
posted by etpm
22 comments posted 13yrs posted by etpm