Touch Tone 2.0

Capacitive touch i2c piano board

• MPR121
• Capacitive touch chip
• WS2812
• cost ?

Pin Layout

Be careful here. The address pin leads the left side, making the successive boards not line up perfectly.

From top left down 1. Address select 2. SDA 3. SCL 4. D_IN_PWM (WS2812) 5. GND 6. VCC

From top right down 1. SDA 2. SCL 3. D_OUT_PWM 4. GND 5. VCC