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 Forum index » Clavia Nord Modular » NM Classic (NM1 or G1)
Control Pedal input
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ersatzplanet



Joined: Jul 24, 2005
Posts: 64
Location: Seattle, WA, USA

PostPosted: Sun Jan 10, 2021 1:59 pm    Post subject: Control Pedal input
Subject description: Looking for a schematic or basic layout
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I would like to make an external control on my NM1 to use as a pitch bend or modulation input. I would like to wire it up to the Control Pedal input so as not to mod the unit. I have some spare Force Sensing Resistors from making Synthwerks modules, so that is what I plan on using (I can stick them right to the chassis).
I know it will be a painfully simple circuit, but I can't seem to find any info on it.

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mush



Joined: Jul 26, 2007
Posts: 56
Location: copenhagen noise lab, denmark
Audio files: 2
G2 patch files: 2

PostPosted: Sun Apr 25, 2021 10:27 am    Post subject: Reply with quote  Mark this post and the followings unread

Put a trs-cable into the jack. Measure the Ring, Tip and sleeve with your multimeter. The standard setup is a 3.3v or 5v out on the ring. Sleeve provides ground and the tip in the input for signal. So with an FSR you will put a resistor (i would use something in the ballpark of 100 ohm) between tip and ground to change the function of the FSR from pure resistance, into a voltage divider, you put it from the ring to the tip. And you may want to add en extra resistor between the actual tip and the mid point of this voltage divider.

Checkout the graphics here, as it explains the function quite well:
http://blackaddr.com/expression-pedal-repair-and-mod/
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