While the Arduino microcontrollers work fairly well on their own, they can take your projects to the next level once you pair them with ESP32 and Raspberry Pi Pico boards.

The brains of the build is an Arduino Nano ESP32. No, that’s not a typo. It’s basically an ESP32 in a Nano-like form factor.

[mircemk] shows how to create a simple non-contact proximity sensor using little more than an Arduino Nano board, and a convenient software library intended to measure the value of capacitors. The … ...