open-source

MPR121 Touch Interface

Twelve capacitive inputs turn foil, conductive fabric or metal into controls. Add a separate host for a touch instrument or interface.

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License: CC BY-SA 3.0
Source revision: Rev A · original header-only edition
Last mirror: Sep 10, 2026
Git commit: d1e18d5ea07d

About MPR121 Touch Interface

Twelve capacitive inputs turn foil, conductive fabric or metal into controls. Add a separate host for a touch instrument or interface. 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) · Limor Fried / Adafruit Industries
Mirrored at d1e18d5ea07d

Canonical source stays in the upstream git repository (and in WalGit after a successful mirror push). Generated renders and 3D models use artifacts/viagrid/mpr121-touch/d1e18d5ea07d596006c414746e8c1ac4c8230e1f/0f445a9b45e423da on the artifact CDN and are not checked into git.