[James Eckert] got his hands on a Freescale MPR121 capacitive touch sensor. The chip in question speaks I2C and senses up to twelve simultaneous capacitive sense electrodes; break-out boards are ...

Hardware Requirements Arduino Uno or similar microcontroller Breadboard for assembling the circuit Capacitive Touch Sensor (e.g., MPR121 or a DIY capacitive sensor circuit) Conductive Wire to connect ...

Capacitive sensing ... parts to replicate a whole lot of touch interfaces – buttons can easily be made into a smallish keyboard, and the radial touch sensor will emulate the ‘wheel ...

You can find information how to build the DIY Capacitive Water Level sensor her -> Link: Read and display raw values or IIR filtered values from capacitive touch pad sensors. Once configured, ESP32 is ...