On 27/06/2011 23:25, IVP wrote:
>> roughly calculate inductance by measuring a high frequency signals
>> voltage loss when though an inductor.
> Jason, I used that method for a while and found it adequate but then
> found a simple PIC circuit that measures and displays L (or C)
>
> http://www.siliconchip.com.au/cms/A_110500/article.html
>
> http://www.siliconchip.com.au/cms/attachments/show.html?year=3D2008&month=
=3DMay
>
> I use it a lot for testing/winding inductors and checking caps
>
> Can flesh the info (eg schematic and parts placement) out later if
> anyone's interested
>
> Joe

I bought this in my last job. http://www.aade.com/lcmeter.htm
(The Filter design SW that's free is good too)

Then I had no money and built a similar published one (can't remember=20
name, but it's not a copy) with parts I had lying around. It has reed=20
relay and accurate Mica cap (selected on test with a professional bridge=20
rather than the 1% off the shelf part). Useful down to 0.5pF and 100nH

Basically an oscillator and PIC measures frequency. On/Off, L/C switches=20
and zero button (connector O/C on Cap zero and short on Ind zero)

--=20
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