The Guitar Effects Development Board - Hackster.io
Guitar Pedal X - GPX Blog - Drunk Beaver reinvents the classic overdrive pedal as the wonderfully Resonant, High Voltage, and Enhanced Harmonics Multi-Clipping The Forest Song
Synthrotek Ratatak Distortion Guitar Pedal PCB
PROTIS 1 Guitar Effects Development Board - Stompbox Electronics
Guitar Pedal X - GPX Blog - Drunk Beaver's 19th Pedal Drop is a killer confection of Boss OD-1 style 14-Leg Opamp tone generation, with OD-3 style Tone-Stack and additional clipping options
Guitar Pedal Development Board
PROTIS 1: Guitar Effects Development Board - Stompbox Electronics
Orange Squeezer - Build your own compressor guitar pedal kit | eBay