Want to add an expression pedal to control the oscillation pot on Demi Ever Hyperion 2 - how should I go about this?

[mzy12]

Hello!

Just wondering if It would be possible to add an expression pedal to control a 100k potentiometer to my build of the Hyperion 2, for the oscillation control, in a way that allows the full range of the pot to be smoothly expressed. I know how to wire a switching jack to a potentiometer, but the main concern I would have is that there is no 100k expression pedal readily available, so how should I go about wiring it so that a common 10k expression pedal would be able to sweep the whole range of the pot?

Thanks!

 

[Diynot]

100k expression pedals are out there and I believe the Moog ep-3 has adjustable resistance

 

[mzy12]

View attachment 56057
100k expression pedals are out there and I believe the Moog ep-3 has adjustable resistance

Thank you. It does look like that I will have to get a 100k expression pedal to get the controls to work properly. I was just curious if I could use some parallel trickery to get most of the way there with a, say, 10k pedal.

 

[jwin615]

I don't see why parallel resistance wouldn't mostly work.
Use the highest value expression you can, so the parallel resistance is lowest.
Or start playing with digital pots.

You could easily simulate on a breadboard, or off, with an 1M pot and 100 ohm resistor.