MPR121 Breakout I2C Capacitive Touch Sensor Controller Module (12-Channel Touch Input Board)

The MPR121 Breakout I2C Capacitive Touch Sensor Controller Module is a compact touch interface board based on the MPR121 capacitive touch controller IC. It supports up to 12 independent capacitive touch inputs, enabling reliable touch sensing without mechanical switches. The module communicates with microcontrollers through the I2C interface, making it easy to integrate with Arduino, ESP32, ESP8266, STM32, Raspberry Pi, and other embedded platforms. With built-in filtering, automatic calibration, and configurable sensitivity, it is ideal for touch panels, interactive projects, home automation, musical instruments, and human-machine interface (HMI) applications.

Key Features -

• Based on MPR121 capacitive touch controller IC

• Supports 12 independent touch inputs

• I2C digital communication interface

• Built-in automatic calibration

• Adjustable touch and release sensitivity

• Low power consumption

• Fast and reliable touch detection

• Interrupt output for event notification

• Compact breakout board design

• Ideal for touch-based control applications

Specifications -

• Product type - Capacitive Touch Sensor Controller Module

• Controller IC - MPR121

• Touch channels - 12

• Communication interface - I2C

• Operating voltage - 3.3V to 5V DC

• I2C address - Configurable

• Detection method - Capacitive Touch

• Interrupt output - Supported

• Mounting type - PCB Breakout Module

• Operating temperature - Standard Industrial Range

Applications -

• Touch control panels

• Home automation

• Human-machine interfaces (HMI)

• Interactive installations

• Musical instruments

• Robotics

• Smart appliances

• Embedded electronics