MPR121 TouchPad

Introduction

The MPR121 capacitive keypad uses the MPR121 and 12 touch sensitive pads to give you a simple 'keypad' with an I2C output. The board also has four mounting holes allowing it to be used as an input system in place of traditional buttons. The 5V - 3.3V level convertor intergrated on this keypad provide you the options for 3.3V and 5V I2C interface for your microcontroller.

Features

• Low power operation
• 3.3 V supply operation
• 12 capacitance sensing inputs
• Complete touch detection
• Auto-configuration for each sensing input
• Auto-calibration for each sensing input
• Touch/release threshold and debounce for touch detection
• 3.3V and 5V I2C interface, with Interrupt output

Application

• Switch Replacements
• Touch Buttons
• Touch Keypad
• Touch Slide bar
• Touch Wheel
• Touchpad
• Touch Panel
• Near Proximity Detectio

Usage

Here is guide illustrate you how to connect MPR121 Touchpad to Arduino.

Document

[Arduno example]

[MPR121 datasheet]

[MPR121 Touchpad schematic]

How to buy

[Click here to buy MPR121 Touchpad]