One more question (after a long session last night)
I have the eight pots set up with +15v coming in, then out to a 200K
resistor and then on to the I1, I2, I3, etc
Things work properly, *but* there is a voltage "bump" at the upper
end of each pot's range and it seems to leak into the Output. For
example, step #2 is active, the pot set about 50%, +3v coming from
the Output. If I turn step #6 (or #5 or #1) pot clockwise, at the
very end of the range the Output will jump up to ~+3.1v.
Everything is fine if I keep the pots from going to the last 5% of
their clockwise sweep. ????
Drew
I have the eight pots set up with +15v coming in, then out to a 200K
resistor and then on to the I1, I2, I3, etc
Things work properly, *but* there is a voltage "bump" at the upper
end of each pot's range and it seems to leak into the Output. For
example, step #2 is active, the pot set about 50%, +3v coming from
the Output. If I turn step #6 (or #5 or #1) pot clockwise, at the
very end of the range the Output will jump up to ~+3.1v.
Everything is fine if I keep the pots from going to the last 5% of
their clockwise sweep. ????
Drew
--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> >Well I know why my first Sequential Switch did the pop 'n smoke
> >thing... wrong chips! 4051 isn't 4015 :)
>
> That would make a minor difference :)
>
> >On my "fixed" version, the current step LED takes about 3 seconds
to
> >totally go dark when I remove power. Is that an indicator of
something
> >wrong or is that OK ?
>
> That is caused by the power supply capacitors and decoupling
capacitors
> discharging. Quite normal.
>
> Ken
>
>
>
______________________________________________________________________
_
> Ken Stone sasami@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
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<http://www.blaze.net.au/~sasami/>
>