[sdiy] S-trig -> V-trig

[Terje Winther]

At 9:47 -0400 01.05.2001, Dan Gendreau wrote:
>> do anyone of you have schematics for a S-trig to V-trig
>> converter?
>> I suppose I must have a +5V (or higher?) voltage taken from somewhere, and
>> have it
>> turned on everytime the S-triggers grounds. Any suggestions for a simple
>> solution?
>
>Simplest way I can think of:
>An inverter with a 10k pullup resistor at its input.
>When the switch is open, the pullup presents 5V to the inverter and the
>output is 0V.
>Then the switch is shorted, the input is 0V and the output is 5V.
>
>The same trick could also be done with an opamp. It requires more resistors,
>but the advantage is that you could put in a pot to select the trigger
>voltage.

Which might be a good idea, as I probably will use my moog to drive
different brands of other synths.
Thank you for the suggestions - I'll probably have to make a modular unit
to go into a rack, so that I have the power from somewhere.


tw.  :)