Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [AF-1982]

Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121

Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [AF-1982]

Price: $17.93
Fastest delivery: Friday, 5th November
Order before 2pm Tuesday, 26th October
Available with a lead time
(100 units can dispatch between Nov 04 to Nov 09)
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Ships from: Little Bird (SYD) → You
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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 analog 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.

Of course, we wouldn't leave you with a datasheet and a "good luck!" - we wrote a detailed tutorial showing how to wire up the sensor, use it with an Arduino and example code that gets the sensor logging data and detecting your touch!

 


//www.youtube.com/embed/iQGsR595MeM?start=175

 

Customer Reviews

Marcus W.
Rating of 5 StarsVerified Purchase

Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121

Reviewed in VIC, Australia on 12 Jul 2021
I give the Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 a rating of 5 stars!
I give the Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 a rating of 5 stars!

Categories with Capacitive Touch Sensor

Breakouts, Boards & Electronics
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We can get a further 100 units from Adafruit
Shipping: Adafruit (🌐) → Little Bird (SYD) → You
If you order more than 0 units your estimated delivery is: Thursday, 4th November — Wednesday, 24th November.
This is an estimate only and delivery times vary.

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