In fact that photo is of a board I built for somebody else and I don't
even have the board any more. But you don't need photos to troubleshoot
this. If your CGS VCO isn't oscillating, it's usually a construction
mistake or a bad part. If you used my schematic, there are a some
differences that you should check by comparing the circuit you built to
the schematic. Make sure the FET is the correct type and installed
correctly. Make sure the power is connected correctly. And so on. A
close visual inspection can often turn up a problem, such as a flaw in
the etch, or a missing jumper wire. You will find the problem if you
persist.
Richard
http://www.pugix.com/cgs-vco.htm
Rykhaard wrote:
even have the board any more. But you don't need photos to troubleshoot
this. If your CGS VCO isn't oscillating, it's usually a construction
mistake or a bad part. If you used my schematic, there are a some
differences that you should check by comparing the circuit you built to
the schematic. Make sure the FET is the correct type and installed
correctly. Make sure the power is connected correctly. And so on. A
close visual inspection can often turn up a problem, such as a flaw in
the etch, or a missing jumper wire. You will find the problem if you
persist.
Richard
http://www.pugix.com/cgs-vco.htm
Rykhaard wrote:
> Hey Richard - a couple of months ago, I'd followed your site as
> closely as I were able to, to build the Stone VCO the way that you've
> shown at your site. I've compared everything word for word as well as
> closely as I'm able to with the photo that you have up.
>
> Nothing. LM311's not spitting out a thing.
>
> I'm suspecting that there's something that I've possibly missed, that
> I'm not able to make out in your version's photo.
>
> Is there a chance that you could email me a greater resolution photo
> of the top and bottom of the board so that I may further compare?
>
> Ultimately - I'd LOVE to build a BUNCH of your cut down versions, as
> in time, I'll be building my own waveform converters in a separate
> panel. (My old Split-Wave; dual PW/PWMs and the normal ones.)
>
> Thanks for any help. :)
>
>