5pcs/10pcs MPR121 Breakout V12 Capacitive Touch Sensor Controller Module I2C keyboard Development Board For Arduino

Overview

Upgrade your interactive projects with the 5pcs/10pcs MPR121 Breakout V12 Capacitive Touch Sensor Controller Module. Designed for seamless I2C communication, this development board lets you create responsive touch keyboards, gesture controls, and smart interfaces for Arduino and other micro‑controller platforms.

Key Highlights

• Supports up to 12 independent touch electrodes per module for versatile input layouts.
• High‑speed I2C interface (400 kHz) simplifies wiring and reduces pin usage.
• On‑board VCC‑12V to 3.3 V/5 V regulator for reliable operation with Arduino, ESP32, Raspberry Pi Pico, and more.
• Compact breakout design with 0.8 mm pitch pins for easy prototyping on breadboards or perf‑boards.
• Available in convenient packs of 5 or 10 modules—perfect for batch projects or classroom kits.
• Fully open‑source library support (Adafruit_MPR121, SparkFun_MPR121) for rapid development.

Technical Specifications

• Chip: MPR121 (Capacitive Touch Sensor Controller, V12 firmware)
• Touch Channels: 12 (configurable)
• Communication: I2C (Address: 0x5A, 0x5B, 0x5C, 0x5D selectable)
• Operating Voltage: 2.5 V – 5.5 V (3.3 V & 5 V logic compatible)
• Current Consumption: ~300 µA (active), <1 µA (sleep mode)
• Touch Detection Range: 0 – 12 pF (adjustable via registers)
• Dimensions: 30 mm × 20 mm × 5 mm
• Connector: 0.8 mm pitch, 8‑pin header (compatible with standard breakout sockets)

Compatibility

Works flawlessly with popular development platforms, including:

• Arduino Uno, Mega, Nano, Leonardo
• ESP8266 / ESP32
• Raspberry Pi (via I2C GPIO pins)
• Teensy, STM32, and other 3.3 V/5 V micro‑controllers

Why Choose This MPR121 Module?

Whether you’re building a custom MIDI controller, a touch‑sensitive keypad, or an interactive art installation, the MPR121 breakout offers:

• Fast, reliable touch detection with built‑in auto‑calibration.
• Scalable design—stack multiple modules on the same I2C bus for up to 48 touch inputs.
• Low power consumption for battery‑operated projects.
• Comprehensive documentation and a vibrant community of makers.

Package Options

Choose the quantity that fits your project scale:

• 5‑piece pack – Ideal for prototypes, hobbyists, and small‑batch production.
• 10‑piece pack – Perfect for classroom kits, workshops, or larger installations.

Get Started Quickly

Each module includes a detailed datasheet, wiring diagram, and links to example code. Plug the breakout into a breadboard, connect SDA, SCL, VCC, and GND, and you’re ready to start detecting touch in minutes.