open-source

MOD-IO2 relay & GPIO controller

An addressable I²C board with two relays, GPIO, analog inputs and PWM for small bench-automation experiments.

Remix this board → View source on www.olimex.com ↗

License: CC BY-SA 3.0
Source revision: Rev D · CH32V003
Last mirror: Sep 10, 2026
Git commit: d4e61519395a

About MOD-IO2 relay & GPIO controller

An addressable I²C board with two relays, GPIO, analog inputs and PWM for small bench-automation experiments. Original two-layer design for adaptation to ViaGrid; rerouting and testing are required.

Published design files

Controls & displays · two copper layers
Open source (CC BY-SA 3.0) · Olimex Ltd
Mirrored at d4e61519395a

Canonical source stays in the upstream git repository (and in WalGit after a successful mirror push). Generated renders and 3D models use artifacts/viagrid/mod-io2-relay-controller/43791fdd61376f09260604aa91b542b0d31c5319c62f7f53666392c200b75b0a/70a74231fcc5f306 on the artifact CDN and are not checked into git.