[sdiy] Fet to short pedal input?

[Tom Wiltshire]

I've checked the Arp Odyssey schematics (since it has one of these inputs). The relevant part is attached below.

The Portamento input jack is a TRS jack connected across the ends of the 1M audio-taper portamento pot. So shorting the Tip and Ring connections disables the portamento. It's not a simple short-to-ground action as I had thought it might be, but any bidirectional switch should work in this position.



> On 27 Nov 2025, at 20:34, el macaco via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20251128/e8411a01/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ArpPortamentoInput.png
Type: image/png
Size: 175543 bytes
Desc: not available
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20251128/e8411a01/attachment.png>