DIY Master Clock

DIY Arduino master clock that syncs MIDI gear, Eurorack and Pocket Operators

DIY Master Clock repository on GitHub
DIY Master Clock on GitHub.© immoreel
Good to know
  • Setup: A hardware DIY build: you assemble the circuit and enclosure yourself.

About

A DIY hardware master clock that synchronizes MIDI gear, Eurorack modules and Pocket Operators from one source. It is built on an Arduino Nano (LGT8F328P) on stripboard in a 1590DD aluminium enclosure, with BPM from 20 to 300 set by rotary encoder, tap tempo or CV. Outputs are two MIDI outs, four clock outs with configurable divisions and an audio-level sync pulse for POs on a stereo 3.5 mm jack, with MIDI in, CV in, swing and an OLED display.

Devices
Pricing
free — Public source on GitHub; no license stated
By
immoreel
Last verified
Oct 18, 2026
Source: GitHub