Touch switch/sensor Capacitive MPR121 Breakout I2C - 12 Channels
Product information:
The MPR121 is a compact capacitive touch controller with I2C interface, ideal for building touch-sensitive interfaces in electronic projects. The module supports up to 12 individual touch electrodes plus a virtual thirteenth electrode. In addition, 8 pins are available for directly driving LEDs (when they are not used as electrodes).
Perfect for applications such as touch buttons, interactive installations, MIDI controllers, or projects with Arduino and other microcontrollers.
Number of touch channels: 12 (plus 1 virtual)
I2C Address: Default 0x5A (adjustable via jumper)
Additional features: 8 LED control pins
Supply voltage: 2.5V – 3.6V DC (no onboard regulator)
I2C pull-up resistors: present (can be disabled via jumpers)
Dimensions: 30.6mm × 20.6mm
Please note: the module does not contain a voltage regulator - therefore only connect a suitable power supply (2.5–3.6V). Suitable for use with e.g. Arduino, ESP32 or Raspberry Pi (via voltage converter).
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