# Pedal-O-Matic foot pedal module

**URL:** <https://lookmumnocomputer.discourse.group/t/pedal-o-matic-foot-pedal-module/1210>\
**Category:** DIY STUFF\
**Created:** [June 13, 2020, 3:34pm UTC](https://lookmumnocomputer.discourse.group/t/pedal-o-matic-foot-pedal-module/1210 "2020-06-13T15:34:42Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![fredrik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fredrik/32/682_2.png) [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)\
**Post date:** [June 28, 2020, 9:35am UTC](https://lookmumnocomputer.discourse.group/t/pedal-o-matic-foot-pedal-module/1210/12 "2020-06-28T09:35:30Z")

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I don’t think that’s any more standardized for Kosmo than for Eurorack, but @antoine.pasde2 has collected some information here:

> [@Kosmo Specification](https://lookmumnocomputer.discourse.group/t/kosmo-specification/896):
>
> Let’s try to capture what we know of the Kosmo standard in this Wiki to help people interface with Kosmo modules or design new Kosmo-compatible modules. Both electrical and mechanical information should be listed. This is a first draft, feel free to correct any error and add missing information. SPECIAL REQUEST: KiCad templates for front panels with mounting holes and example jack socket , trimmer and potentiometer holes would be greatly appreciated. ELECTRICAL Power Supply +12V, -12V r…

but I think the first question should be “which CV” – anything with a summing node and either an existing on-board offset (e.g. coarse tune, octave selector, etc) or one external CV plugged in can handle an additional negative CV just fine. Other circuits might be less willing to deal with negative CVs.

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