DESCRIPTION
Add lots of touch sensors to your next microcontroller project with this easy-to-use 12-channel capacitive touch sensor breakout board, starring the MPR121. This chip can handle up to 12 individual touch pads.
The MPR121 has support for only I2C, which can be implemented with nearly any microcontroller. You can select one of 4 addresses with the ADDR pin, for a total of 48 capacitive touch pads on one I2C 2-wire bus. Using this chip is a lot easier than doing the capacitive sensing with analogue inputs: it handles all the filtering for you and can be configured for more/less sensitivity.
This sensor comes as a tiny hard-to-solder chip so we put it onto a breakout board for you. Since it’s a 3V-only chip, we added a 3V regulator and I2C level shifting so its safe to use with any 3V or 5V microcontroller/processor like Arduino. We even added an LED onto the IRQ line so it will blink when touches are detected, making debugging by sight a bit easier on you. Comes with a fully assembled board, and a stick of 0.1″ header so you can plug it into a breadboard. For contacts, we suggest using copper foil or pyralux, then solder a wire that connects from the foil pad to the breakout.
Getting started is a breeze with our Arduino library and tutorial. You’ll be up and running in a few minutes, and if you are using another microcontroller, its easy to port our code.
FEATURES
- Dimensions: 33mm x 19mm x 2mm / 1.3″ x .8″ x .1″
- Weight: 2.2g
- Uses I2C 7-bit address 0x5A (can be set to 0x5B, 0x5C or 0x5D)
RESOURCES
- Tutorial
- MPR121 Datasheet
- EagleCAD PCB files on GitHub
- Fritzing object in Adafruit Fritzing library
- Bildr Tutorial
Professionally packed and fast shipping
Due to our long-term partnership in a long-standing partnership with UPS, FedEx, DHL and many other leading global carriers, we are able to offer various shipping options. Our warehouse staff are highly trained to package your goods exactly according to the specifications we offer. Prior to shipping the goods are thoroughly inspected and secured. Each day, we ship to thousands of customers in multiple countries. This shows our commitment to becoming the biggest retailer on the internet. The warehouses and centers of distribution are situated in Europe, as well as the USA.
It is important to note that orders with multiple items are processed according to the item.
Prior to shipping before shipping, we'll conduct a thorough inspection of the items you have ordered. Today, the majority orders will be delivered within 48 hours. Delivery time ranges between 3-7 days.
Returns
We don't control the inventory in our factory and warehouse. Therefore, the actual inventory could fluctuate at any moment. Please be aware that it's possible that your order could run out of stock even after you have placed the order.
Our policy is valid for a period of 30 days. If 30 days have gone by since your purchase, unfortunately we can't offer an exchange or refund.
For your item to be returned it must be in its original packaging, unopened and in the same state as you received it in. It should also be returned in the original packaging.
Related products
Acceleration
Accessories and Breakout Boards
Atmospheric
Temperature and Pressure
AM2320 Digital Temperature and Humidity Sensor (ID: 3721) Adafruit
Acceleration
Temperature and Pressure
5″ eTape Liquid Level Sensor with Plastic Casing (ID:3828) Adafruit
