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Author Topic: reading CV  from volume pedal  (Read 785 times)
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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
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You should connect the ring to ground on Arduino.
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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.
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tip = 5v (from arduino)
ring = analog pin
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Stephen

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

this does also not work, it only gives the value 0.
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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
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Have you tried reading the plug with a VOM?
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Stephen

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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.
« Last Edit: November 28, 2008, 05:20:45 pm by Franklin » Logged

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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?
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