[sdiy] ASM1-VCO Problem

[René Schmitz]

Michiel wrote:
> Hi, I've build the ASM1-VCO, but I'm having troubles to get it
> running correctly, it won't osscilate: both outputs seem to be stuck
> at +5V. I tried to increase the 18pF Condensator, but it did not
> help. I also checked every component for it's polarity etc. The
> circuit is consuming about 20mA when I power it, so I guess there is
> no short or something like that. I was wondering if anyone maby could
> help me to a site with some mesurement data or something so I could
> test the board? that would be really great.

There is one connection missing in the schematics arround the LM311. You 
have to tie its GND pin (pin 1) to -15V.

Hope that helps.

Cheers,
  René



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