2 Pack MPR121 Breakout Module V12 Proximity Keyboard Capacitive Touch Sensor I2C Controller With 12 Electrodes And Simulated Thirteenth Electrode, LED Driving Pins, Low Power Operation 1.71V-3.6V

Two-Pack MPR121 Breakout: 12-Electrode Capacitive Touch
✔️ I2C 12-electrode touch sensing with LED drivers, 1.71-3.6V

The MPR121 breakout module is a compact capacitive touch sensor controller that supports up to 12 electrodes plus a simulated 13th. It features 8 LED driving pins and uses I2C for easy integration with microcontrollers. This board is ideal for DIY keyboards, touch panels, and handheld controllers where small size and low power matter.

✅ 12 capacitance sensing inputs for touch detection
✅ 8 multifunctional pins for LED driving or GPIO
✅ I2C interface with interrupt output for responsive control
✅ Auto-configuration and auto-calibration per input
✅ Low power operation with 3 µA stop mode and 29 µA at 16 ms
✅ Supply voltage range 2.5-3.6 V (no onboard regulator)

💡 What is a capacitive touch sensor controller used for in electronics projects?

Handy for adding touch input to keyboards, panels, and handheld gadgets. I2C interface makes wiring simple and auto calibration keeps sensing reliable.

- Handy for keyboards and panels - I2C interface simplifies MCU wiring and data exchange - Auto-calibration improves reliability over time - Low power operation supports battery-powered designs