This project demonstrates how to use a capacitive touch sensor module with an Arduino Uno. The touch sensor detects touch or proximity, triggering an action in response to the input.

The Arduino Nano, paired with a capacitive touch sensor module, enables touch-sensitive input, ideal for applications like touch-activated controls, interactive panels, and user interfaces in ...

The sensor forms an image and OpenCV detects the actual touch configuration. It appears you can use the raw data from the Arduino, too, but it might be a little harder.

On the software side capacitive touch sensors can be as simple as using an Arduino library for the purpose but [John] rolled his own code, so give it a peek.

And, since its pin compatible with most Arduino shields, you can add even more capabilities to the Touch Board for more complex projects.