ماژول MPR121 CAPACITIVE TOUCH MODULE

This controller supports up to 12 independent electrodes, allowing you to handle multiple touch inputs simultaneously. Furthermore, it includes an additional analog 13th electrode for added flexibility.

With 8 built-in LED driver pins, this controller offers the convenience of driving LEDs directly from the board. When not configured as electrodes, these pins can be utilized to power and control LEDs effortlessly.

The board incorporates four default jumpers at the bottom for quick configuration. By connecting the ADD pin to ground using one of the jumpers, the chip's default I2C address is set to 0x5A. However, if you require a different address, simply open the jumper and connect ADD to an alternate pin, ensuring proper connections with SDA, SCL, and interrupt pins via 10k pull-up resistors.

This controller operates within a voltage range of 2.5 - 3.6VDC, providing compatibility with various power sources for seamless integration into your application. Please note that the VREG pin must be connected to ground through a 0.1uF capacitor for reliable operation, preventing low-power mode functionality (1.71-2.75VDC) unless modifications are applied to the circuit board.

Designed with energy efficiency in mind, this controller boasts minimal power consumption. Its operating voltage spans from 1.71V to 3.6V, optimizing power usage while ensuring reliable touch sensing performance. It utilizes the widely accepted I2C bus interface and offers interrupt output for easy integration with other devices.