[sdiy] Fet to short pedal input?

[Roman Sowa]

This might work, although a bit of chematics or at least which synth you 
talk about would help.

If it's switch input, that's super easy, just use FET directly. If it's 
analog input, like expression pedal, you might want to experiment a bit 
on required scale. FET will work as resistor only with small UDS voltage 
and beyond that it's more of a current source. Which is not bad if the 
expression input only expects voltage from pedal's potentiometer. But if 
it's simply using pedal's resistance in glide RC circuit, you will have 
more of linear portamento most of the time.

Roman

W dniu 2025-11-27 o 21:34, el macaco via Synth-diy pisze:
> Hi all,
> 
> The portamento pedal input on arps has me thinking of using my midi to 
> cv converter's velocity output (+5V) to activate a fet with the two 
> pedal contacts on the source and drain.
> 
> Can it be this simple?  The only power coming from the velocity 5v?
> 
> Thanks,
> 
> Ed
> 
> Get Outlook for iOS <https://aka.ms/o0ukef>
> 
> ________________________________________________________
> This is the Synth-diy mailing list
> Submit email to: Synth-diy at synth-diy.org
> View archive at: https://synth-diy.org/pipermail/synth-diy/
> Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org