potentiometer to analog in; dent in curve

[tim vets]

I'm using a Roland EV-5 pedal connected to an analog input.
This was very easy to get working, cool ... :)
I first tried it on a v5 axoloti core, and it worked exactly as expected.
I now connected the same EV-5 to a v3 board, but I get a dent in the curve.
Here's what it looks like, when moving the EV-5 up/down once in the timespan of one disp/chart draw:

Any idea what might be causing this?
thanks,
Tim

[Johannes Taelman]

No idea. Is it the same pedal that was working perfectly before?

It could be a worn-out potentiometer in the pedal, as the glitch seem to happen at the same position.

I don't see a reason why a v3 board 'd be different than a v5 board. Maybe try a different analog input pin on the board to eliminate a bad solder joint?

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[tim vets]

On Saturday, May 16, 2015 at 10:08:21 PM UTC+2, Johannes Taelman wrote:

No idea. Is it the same pedal that was working perfectly before?

yes, same pedal

It could be a worn-out potentiometer in the pedal, as the glitch seem to happen at the same position.

I don't see a reason why a v3 board 'd be different than a v5 board. Maybe try a different analog input pin on the board to eliminate a bad solder joint?

I'll do some more testing later
gr,
Tim