cheep3a

Maker	Eric Brombaugh
Type	Sub-dollar CH32V003 RISC-V digital audio generator
Mounting	SMD
Width	6 HP
License	Proprietary (MIT covers the code, no hardware grant)
Difficulty	🌋 Fine-pitch SMD

Three CV inputs with offset pots, one digital trigger input, two 16-bit audio outputs at 48kHz, a mode button and an RGB LED. Seven firmware modes cover dual sines, noise and other generators. A JLCPCB assembly BOM is included but no gerbers.

Documentation

• Bill of materials (BOM)
• Schematic

Links

• Source / files on GitHub
• Maker page

More from Eric Brombaugh

dspod Eurorack DSP carrier module with swappable processor daughterboards Cheep4 Low cost digital oscillator on an STM32C5 with an I2S DAC RP2040 Audio Stereo audio effects module built on the RP2040 with a WM8731 codec S3GTA ESP32-S3 effects module with a circular LCD and touch ring G081 Audio Reverb module running the Alesis MIDIVerb algorithms on an STM32G081 ESP32S2 Audio Stereo audio effects module built on the ESP32-S2 with a WM8731 codec f373_seq2 Three channel CV and gate step sequencer on an STM32F373

More oscillator modules

Braids Mutable Instruments Plaits Mutable Instruments Edges Mutable Instruments CHORD VCO HAGIWO 3340 VCO diysynth Tom Yum Voxmachina 2OPFM Super Synthesis Castor & Pollux Winterbloom

This is a third-party open-source design, listed here as a build reference. Specs are researched from public sources; check the source repo and store for the current BOM, panel, and revision before ordering parts. Corrections welcome.

← Back to all builds Resources Suggest a correction or a missing module