How to use a capacitive touch sensor for Arduino

Arduino Basics: MPR121 Capacitive Touch Sensor
In this video we set up and use the MPR121. This board communicates with your Arduino via I2C, but is only 3.3V. So if you are not using a 3.3V Arduino, you will need to use a level shifter or the MPR121 will not work.
We use the Bare Conductive MPR121 library, you can download it here: github.com/Bar...
In this library, we need to use the IRQ pin. Attach it to Arduino D4.
The MPR121 board is available here: amzn.to/2p9qQab A pair is $7
The level shifter board is available here: amzn.to/2pZ84Xc a pair is $1.19
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Please watch: "Diodes: The basic building block of all digital circuits"
• Diodes: The basic buil...
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[@farriertv2501]

I have no idea what I just watched because I am just getting into soldering electronic components, but I have a desire to one day know what you know. Can you suggest a good place to start learning about the fundamentals of this type of knowledge? Thank you and I’m subscribing.

[@ColeccionAnime]

hi can U make the MPR121 work as a PC keyboard and send some letters to WORD?... i all ready did everything and works great but i need to send some Letters to my PC.... can U help me... by the way great explanation...

[@nguytd03]

why do you need the level shifter when the arduino board has both 3.3v and 5v dc?

[@DanielHeppner]

Nice! The MPR121 is a great board and I've used it for some projects of my own.

[@SanjeevRaikar]

What is interrupt pin (4) what should I attach it to?