MPR121 Capacitive Touch Sensor Module – 12-Channel Touch Input Interface for Embedded Projects

The MPR121 Touch Sensor Module is a high-performance capacitive touch sensing module featuring 12 independent touch input channels, designed for applications requiring multiple touch-sensitive buttons or pads. Based on the advanced MPR121 IC from Freescale (NXP), this module communicates via I2C interface, enabling seamless integration with Arduino, ESP32, Raspberry Pi, and other microcontrollers.

With its compact design and versatile touch sensitivity, the MPR121 module is perfect for building custom touch keypads, gesture control panels, interactive installations, MIDI controllers, and IoT-based smart interfaces. It can detect human touch through non-metallic materials like plastic, acrylic, or glass, allowing for sleek and innovative designs.

Key Features:

• Operating Voltage: 3.3V – 5V DC

• Touch Input Channels: 12 Independent Capacitive Touch Pads

• Communication Interface: I2C Protocol (Adjustable Address Pins)

• Onboard Interrupt Pin (IRQ): For efficient real-time touch event detection

• High Sensitivity: Can detect touch through insulating materials (non-metallic)

• Low Power Consumption: Ideal for battery-powered embedded systems

• Onboard Power LED Indicator

• Compact PCB Design: Easy to integrate into touch-based control panels

• Compatible With: Arduino, ESP32, Raspberry Pi, and other development platforms

Applications:

• Multi-Touch Keypads and Control Panels

• DIY Custom Keyboards and MIDI Controllers

• Smart Home Touch Control Interfaces

• Interactive Art & Display Installations

• Touch-Sensitive Kiosks and Vending Machines

• IoT-Based Smart Switchboards

• Wearable Gesture-Controlled Devices

• STEM Education & Prototyping Projects

Package Includes:

• 1 x MPR121 12-Channel Capacitive Touch Sensor Module

Why Choose the MPR121 Touch Sensor Module?

• Supports up to 12 touch-sensitive inputs for advanced control designs.

• Simple I2C communication for seamless microcontroller integration.

• Can be used to create sleek, buttonless designs with hidden touch panels.

• Low power operation perfect for portable and embedded applications.

• Ideal for interactive, creative, and automation projects with multi-touch control.