[sdiy] Re: reset circuit for LFO

[Danjel van Tijn]

>A pullup resistor to convert 5V logic to 12V would just be a 10k (or so) resistor to 12V but in this case I can sense some additional >difficulties.
This does not make any sense to me. My only experience with pullups
was to pull the input high until you ground it (inverse logic). I
don't understand how this would work they way you describe.

>If the power supply is +/- 12V that's too high for 40xx chips (which can=
 >only take up to about 18V=2C VSS to VDD).=A0 The input/output pins of the =
I am actually only using +12V and GND for power to my switch.

I probably need to know more about how the Vulcan actually works....