MPR121 Capacitive Touch Sensor Module – V12 I2C Keyboard Controller

The MPR121 Capacitive Touch Sensor Module is an advanced V12 touch controller driven via the I2C interface. It offers an efficient and compact way to integrate capacitive touch functionality into your embedded systems, Arduino projects, or interactive interfaces. Designed around the MPR121 IC, it supports up to 12 individual electrodes and an additional simulated 13th electrode for custom functions.

Ideal for capacitive keyboards, touch panels, or gesture-based control setups, this module also features 8 LED driving pins that can be configured independently. Its built-in I2C address can be adjusted by modifying the onboard address jumper. The module comes with default 10k pull-up resistors for SDA, SCL, and IRQ lines, which can be disabled by opening jumper pads if not needed.

🔧 Key Features

• 12 capacitive touch inputs (electrodes) with adjustable sensitivity
• Simulated 13th electrode for flexible input mapping
• I2C interface for easy microcontroller integration
• 8 configurable LED driving pins for visual feedback
• Onboard address configuration via ADD jumper (Default I2C: 0x5A)
• Low power consumption, suitable for portable devices

📐 Technical Specifications

📌 Applications

• Capacitive touch keyboards and keypads
• Touch-sensitive control panels and switches
• Gesture interfaces for Arduino or Raspberry Pi
• Home automation interfaces
• Wearable and portable electronics with touch input

💡 Why Choose This Touch Sensor?

The MPR121 Capacitive Touch Sensor Module is a powerful tool for adding intuitive touch-based controls to your electronics. Its I2C interface makes it highly compatible and easy to use with microcontrollers. With adjustable jumpers and flexible input/output options, this module delivers professional-grade performance in a compact form.

📦 Package Includes

• 1 × MPR121 Capacitive Touch Sensor Module