PCBs and FR4 front panel (only) for an infrared input synth module. This module is in LMNC's Kosmo format (20 cm high) and is 5 cm wide.

The circuit is based on a design by Michael Barton. An infrared phototransistor on the front panel translates infrared light into control voltage outputs. You can use this to control your modular synth with a TV remote control, a butane lighter, a candle, or a burning city. Maybe don't burn a city though.

The Barton circuit has been modified to add a gain control to the phototransistor input stage; status LEDs indicating the CV output level and warning of phototransistor saturation; and an input jack for an external phototransistor, allowing you to use a candle (or a burning city) without having to set it up a few cm in front of your synth.

The user needs to source parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Easy through-hole construction.

Be sure to see the Github repository (linked below) for BOM, build notes, and other information.