Skip to Content
  1. All Products
  2. All Products
  3. Touch Keypad MPR121 Capacitive Module
Default
Touch Keypad MPR121 Capacitive Module

Touch Keypad MPR121 Capacitive Module

The MPR121QR2 simplifies the integration of capacitive touch sensing into your projects. Communicating via I2C, this controller measures the capacitance of up to twelve electrode points. When an object approaches an electrode, changing its capacitance, the MPR121 detects a touch event. Beyond touch sensing, it can also drive LEDs or provide GPIO functionality on electrode pins 4–11, offering flexibility for custom applications. With its low power consumption (around 29 µA at a 16 ms sampling interval), it is well-suited for battery-powered designs.
28.35 AED 28.35 AED Tax Included
28.35 AED Tax Included

Not Available For Sale

This combination does not exist.

Capacitive Keypad
Contact Us

Terms and Conditions
30-day money-back guarantee
Shipping: 2-3 Business Days

Share

 

Features

  1. Capacitive Touch Sensing: Detects touch across 12 electrode points with auto-configuration and auto-calibration.
  2. Voltage Range: Operates between 1.71V and 3.6V.
  3. Low Power Operation: 29 µA during active sampling, 3 µA in stop mode.
  4. Multifunctional Inputs: 8 pins usable as LED drivers or GPIO.
  5. Touch Detection Features: Configurable thresholds, debounce settings, and interrupt output.
  6. I2C Interface: Standard communication with interrupt support.
  7. Temperature Range: Operates from -40°C to +85°C.

Specifications

  • Supply Voltage: 1.71V – 3.6V
  • Supply Current (16 ms sampling): 29 µA
  • Stop Mode Current: 3 µA
  • Sensing Inputs: 12
  • Multifunctional Inputs: 8 (LED/GPIO)
  • I2C Interface: Yes (default address 0x5A)
  • Temperature Range: -40°C to +85°C

How to Connect and Program with Arduino

  1. Connectivity:
    • Use I2C interface (default address: 0x5A when ADD = GND).
  2. Programming:
    • Arduino libraries are available for MPR121.
    • Recommended: MPR121 Arduino Library.

Applications

  • Human-Machine Interface: Touch buttons and interactive controls.
  • Interactive Projects: Creative installations, exhibits, and DIY electronics.
  • Low Power Applications: Ideal for battery-powered devices.
  • Sensor Networks: Adds a tactile input dimension to networks.
  • Educational Demonstrations: Great for teaching capacitive touch technology.