reading CV  from volume pedal

Hi!

Does anyone know how to read CV (control voltage) from a expression/volume pedal (ex behringer fcv100)? Connecting a jack cable to the output of the pedal and then the tip to analog in and the ring to 3/5v on the arduino gives no result.

This is what the specs sheet on the pedal says:
input/output:
1/4" TS connectors, unbalanced
Tip: Supply voltage from unit/instrument
to be controlled (Impedance: 50 k[ch937])
Ring: Slider pick-up (control voltage
dependend on pedal position
(Impedance: 0...50 k[ch937])

Sorry if this is very basic - I couldnt find any info on it when searching.. Any help is highly appreciated!

Thanks!
Martin

You should connect the ring to ground on Arduino.

thanks for the quick reply MikMo.

so,
tip -> analog in
ring -> ground

does not give me anything. I doubt that the pedal sends out any voltage.

tip = 5v (from arduino)
ring = analog pin

tip = 5v (from arduino)
ring = analog pin

this does also not work, it only gives the value 0.

if you have acces to a volt meter try to meassure whats coming out of the pedal, to establish if it is sendig out the expecte voltage

Have you tried reading the plug with a VOM?

Just what are you inputting that you are trying to read? This device changes the volume out of the signal input as far as I can tell.

Hi gorgon,

A volume pedal is typically just a potentiometer set up as a voltage divider. There has to be an input signal--what is the input in your case?