Grove - 12 Key Capacitive I2C Touch Sensor V3 (MPR121)

The Grove - 12 Key Capacitive I2C Touch Sensor V3 (MPR121) is a multichannel proximity capacitive touch sensor. It's a 3-in-1 module with the following features: Capacitance Sensing, Touch Sensing, and Proximity Sensing.

Features

• Powerful functions: Integrated capacitance sensing, touch sensing and proximity sensing, and Integrated independent autocalibration for each electrode input
• Hardware configurable I2C address: I2C interface, with IRQ, Interrupt output to advise electrode status changes
• Drive the LEDs: 12 electrodes/capacitance sensing inputs in which 8 are multifunctional for LED driving and GPIO
• Safe handling: Add two more GND pin and expand the gap of pins for safe handling
• Grove compatible interface: The product ensures "Plug and Play" and could be versatile for various applications of Grove

Description Capacitance Sensing: This module uses a constant DC current capacitance sensing scheme. It can measure capacitances ranging from 10 pF to over 2000 pF with a resolution up to 0.01 pF.   Touch Sensing: Once the electrode capacitance data is acquired, the electrode touch/release status is determined by comparing it to the capacitance baseline value.   Proximity Sensing: One new feature of the MPR121 is the near proximity sensing system. This means that all of the system’s electrodes can be summed together to create a single large electrode.   Based on Freescale MPR121, this sensor has 12 completely independent electrodes with built-in autoconfiguration. Thanks to the I2C interface, you can detect all 12 electrode signals with only one Grove pott and the I2C address is hardware configurable from 0X5B to 0X5D. this also makes it possible for multiple Grove -12 Key Capacitive I2C Touch Sensor V3 (MPR121) to be used together for channel expansions in a single system, you can build a touch system which contains max 36 electrodes.   This sensor is an upgraded version of Grove - 12 Key Capacitive I2C Touch Sensor V2 (MPR121), it adds two more GND ports to the head in order to be more stable, meanwhile, the front Pin is spaced more widely so as to avoid a short circuit caused by the lines accidentally touch.  

We have developed more than 400 Grove modules, covering a wide range of applications that can fulfil various needs. Click to explore the Grove Sensor family and get started to Grove your Idea. For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your use of the product.

  Applications

• PC Peripherals
• MP3 Players
• Remote Controls
• Mobile Phones
• Lighting Controls

Specification

Dimensions	60mm x 20mm x 7mm
Weight	G.W 11g
Battery	Exclude
Operating Voltage	3.3 V / 5V
Operating Temperature Range	- 40°C to 85°C
Storage Temperature Range	- 40°C to 125°C
Capacitances Range	10 pF to over 2000 pF
Resolution	0.01 pF
Interface	I2C
I2C address range	0x5B,0x5C,0x5D
Default I2C address	0x5B

 

Hardware Overview

 

Part List

Grove - 12 Key Capacitive I2C Touch Sensor V3 (MPR121)	1
Grove Cable	1