Eurorack clock module
Pulser
in development
Pulser is a clock module for Eurorack systems. Its top priority is tightness: the clock must be as accurate as possible. If a groove needs to feel less mechanical, deviation can always be introduced downstream — but the foundation has to be solid. The RP2040's PIO units make this possible: pulse generation runs in dedicated hardware state machines, unaffected by what the CPU cores are doing.
Demo
see and hear itWhat is known so far
facts from the build log- Master clock for Eurorack
- Tight, PIO-based pulse generation
- BPM control via buttons
- RP2040 (Raspberry Pi Pico)
- HT16K33 display driver
- CV outputs
Final hardware specifications (panel width, power draw, I/O) will be published here once the hardware design is settled.
Build it yourself
free & open sourceAvailable now
Coming as development progresses
Building Log
how this module is being developedThe Pulser Building Log covers the whole journey — why tightness matters, how pulse generation works on the RP2040's PIO, tempo control with a button state machine, and driving the display and CV outputs:
Pulser is free and open source. If you have questions, are stuck, or want a custom variant, just get in touch.