[sdiy] donut wirewound thingies?

[epeasant at telusplanet.net]

>I am salvaging parts from an old cell phone battery charger I found in the 

>trash, and there are two round things that look like the wire wound 
>electromagnet things but they are round like donuts, with the hole and all.
I 
>don't know what they are, or any possible applications, synth or otherwise.


These sound like torroidal coils. They can be useful for noise suppression on
power supply lines.

>also, there are a fair few capacitors there, small yellow ones (look like 

>some polycarbonate one's I've bought.)  is there a resource to find out the

>value of these caps?  I know the 104 = 100nF type stuff, but this looks a bit

>different.  maybe some way with a scope?

A lot of DMMs have capacitor measuring functions, even cheap ones nowadays.
Or you could DIY a circuit to connect to your DMM or your scope.

>I have to give the shout out of thanks to the electronic peasant, whose 
>webpage made me aware of salvage as a source of parts. (thanks man!)
>
You're welcome! Good luck!

Take care,
Doug

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The Electronic Peasant

www.electronicpeasant.com