Beginner

Bare Conductive — Beginner

You've done your first touch interaction. Now dig deeper: understand the MPR121 sensor, write custom code, produce MIDI output, and build increasingly ambitious physical instruments.

01The MPR121 Sensor in Depth Registers, baseline tracking, and filtered vs raw data. 02Reading Touch Data in Code Polling vs interrupt-driven reading, touch/release events, touch bitmask. 03Mapping Touch to Sound Custom track tables, polyphony, hold-to-loop, and velocity-style volume. 04Working with MP3 Files Encoding settings, sample rates, stereo vs mono, and cross-fade. 05Creating Custom Electrodes Foil, copper tape, conductive fabric, and through-material sensing. 06Sensitivity Calibration Threshold tuning, per-electrode settings, and baseline reset. 07MIDI Output Basics Send MIDI note-on/off and CC messages over USB or serial. 08Building a Touch Piano Complete project: a 12-note painted keyboard on board. 09Interactive Wall Murals Painting large-scale electrodes on walls and mounting the Touch Board. 10Touch-Activated Lighting Control NeoPixel LEDs with touch events for visual feedback.