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 touchpads with plug-and-play STEMMA QT connector and large alligator/croc-clip friendly pads, it’s a no-solder solution to capacitive touch sensing.
The MPR121 has support for reading data over I2C, which can be implemented with nearly any microcontroller. You can select one of 2 addresses with the ADDR pin (solder it close for the alternative address), for a total of 24 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 Adafruit put it onto a breakout board for you. Since it’s a 3V-only chip, they added a 3V regulator and I2C level shifting so it’s safe to use with any 3V or 5V microcontroller/processor like Arduino. They 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.
To make using it as easy as possible, they’ve put the MPR121 on a breakout PCB in the Stemma QT form factor with a sprinkle of support circuitry to give you options when testing. You can either use a breadboard or the SparkFun Qwiic compatible STEMMA QT connectors, and compatibility with 5V voltage levels as commonly found on Arduinos, as well as 3.3V logic used by many other boards like the Raspberry Pi or Feathers
Getting started is a breeze with the Arduino and CircuitPython/Python libraries and tutorials. You’ll be up and running in a few minutes, and if you are using another microcontroller, it’s easy to port their code.
FEATURES
Product Dimensions: 51.0mm x 25.2mm x 4.5mm / 2.0″ x 1.0″ x 0.2
RESOURCES
- Primary Guide
- Datasheet
- Example Tutorial
Fast Shipping with Professional Packaging
Thanks to our longstanding association with UPS FedEx DHL and other top international carriers, we are able to provide various shipping options. Our warehouse staff are highly trained and will package your items in accordance with our exact and precise specifications. Your items will undergo an extensive inspection and will be adequately secured before being shipped. Every day, we send thousands of packages to clients from all over the world. This is a sign of our determination to becoming the largest online retailer in the world. There are distribution centers as well as warehouses across Europe and in the USA.
Orders that include more than one item are assigned processing times for each item.
Prior to shipping, our team will perform a thorough inspection on the products you have ordered. Most orders are shipped within 48-hours. The delivery time will be between 3 and 7 working days.
Returns
We are not able to manage the stock in our factory and warehouse. This means that the actual stock could fluctuate at any moment. It's possible that the inventory could run out once the order has been made.
Our policy is valid for a period of 30 days. If it's been more 30 days since you bought the item and we're unable to offer you a full exchange or refund.
The item cannot be used, and it must be in the original packaging. You must have the item in the original packaging.
Related products
Component
ADS1015 12-Bit ADC – 4 Channel with Programmable Gain Amplifier – STEMMA QT / Qwiic Adafruit
Component
ADS1115 16-Bit ADC – 4 Channel with Programmable Gain Amplifier – STEMMA QT / Qwiic Adafruit
Uncategorized
Accessories and Breakout Boards
Accessories and Breakout Boards
Active Components
Uncategorized
