[sdiy] My first failure (4069 VCO)!

[Charles Brodeur]

Hi Scott,
That must be the problem, I got confused by the symbols. Thanks for the
info, I'll have to order some new caps. Thanks for the info!

-Charles 

--- Scott Gravenhorst <music.maker at gte.net> wrote:
> Charles Brodeur <orange_juice_man_returns at yahoo.com> wrote:
> >Hi all,
> > Today I tired to build the 4069 based VCO, and it did not go well.
> >After hours of soldering, I powered it up and got nothing on the
> >outputs. I'm going to try to figure out what's wrong, but not today,
> I
> >need a break. Could it be that the capaciters I used are
> electrolytic?
> >I'll post pictures up at a later date, so say tuned. Thanks for
> >reading!
> >
> >-Charles
> 
> 
> If the timing cap (the one that is used in the integrator) is
> electrolytic, then I can imagine that it's just too large.  You want
> 2.2 nano farads (2.2nF), not 2.2 micro farads (2.2uF) (1,000 times
> too
> large).  If that's what you did, it may actually be working, but as a
> VCLFO.
> 
> 
> =========================================================  
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> -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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> 


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