Skip to Content
  1. All products
  2. 🧠 Controllers & Systems
  3. 📡 Sensors & Modules
  4. MPR121 Breakout V12 Capacitive Touch Sensor Controller Module
  5. 📡 Sensors & Modules
मूल्य सूची: Retail Price (B2C) मूल्य सूची
मूल्य सूची: Retail Price (B2C) मूल्य सूची
MPR121 Breakout V12 Capacitive Touch Sensor Controller Module

MPR121 Breakout V12 Capacitive Touch Sensor Controller Module

(0 review)
ParameterDetailed Specification
Main ChipMPR121 (Freescale/NXP)
Channels12 Capacitive Touch Channels
InterfaceI2C (Serial Interface)
Operating Voltage1.71V to 3.6V DC
Logic Level3.3V (Level shifter required for 5V systems)
Configurable Pins8 LED driving and GPIO pins
Detection TypeTouch and Near-Field Proximity
Low Power< 30µA supply current (Typical)
Price
₹ 80.51 ₹ 80.51
(Tax included)

Product Description

Transform almost any surface into an interactive interface with the MPR121 Capacitive Touch Sensor Module. This high-performance V12 breakout board allows you to add up to 12 individual touch-sensitive pads to your project using just two I2C pins. At Robogears, we recommend the MPR121 for its advanced internal filtering and auto-calibration features, which prevent false triggers caused by environmental changes. Beyond simple touch, this module can also detect near-field proximity, allowing your robot or device to react even before a user makes physical contact. Whether you are building a custom MIDI controller or a secret touch-sensitive hidden switch at your Pimpri facility, the MPR121 provides a robust, professional-grade solution for modern UI design.

Detailed Key Features

  • 12 Independent Electrodes: Supports up to 12 touch points, which can be connected to copper foil, conductive ink, or metal objects to create a custom keypad.

  • Proximity Sensing Mode: Capable of detecting the presence of a hand or finger several centimeters away, enabling non-contact "wave" gestures.

  • Internal Auto-Calibration: Features sophisticated logic that constantly adjusts to ambient humidity and temperature, ensuring the touch sensitivity remains consistent.

  • Configurable GPIO: Eight of the electrode pins can be reconfigured to act as LED drivers or general-purpose digital I/Os.

  • Compact V12 Breakout: Designed with a breadboard-friendly layout, including pull-up resistors and a stable power regulation path.

All Technical Details

  • Pin Definition:

    • 3.3V/GND: Power Input.

    • SCL/SDA: I2C Clock and Data lines.

    • IRQ: Interrupt output (low when a touch is detected).

    • ADDR: I2C Address select pin.

  • Resolution: 10-bit capacitance measurement for high-sensitivity detection through non-conductive materials like plastic or glass.

  • Applications: Conductive ink interfaces, water-resistant control panels, interactive museum exhibits, and human-machine interfaces (HMI).

Prototyping & Engineering Tips (Robogears Exclusive)

  • The 3.3V Rule: At our Pimpri workshop, we always emphasize that the MPR121 is a 3.3V device. If you are using an Arduino Uno (5V), you must use a logic level shifter for the SDA/SCL lines to avoid damaging the sensitive NXP chip.

  • Pad Material: You don't need expensive buttons! Use Copper Foil Tape or even aluminum foil glued behind a 3mm acrylic sheet. The MPR121 can easily "see" through non-metallic surfaces.

  • Wiring Length: Keep the wires between the module and your touch pads as short as possible. Long wires act as antennas and pick up electrical noise, which can cause jittery touch data.

  • The IRQ Pin: To make your code more efficient, use the IRQ pin connected to an interrupt on your Arduino. This way, your microcontroller only reads the I2C bus when a touch actually occurs, saving processing power for other tasks.

Package Includes

  • 1 x MPR121 Breakout V12 Capacitive Touch Sensor Module

  • 1 x Straight 10-pin Male Header

Image Disclaimer

Product images are shown for illustrative purposes only. The color of the PCB (typically Black or Blue) or the specific manufacturer markings on the IC may vary between batches, but the MPR121 12-channel touch performance and I2C functionality remain as described.