[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 proximity sensor industry is projected to grow from USD 4.3 billion in 2024 and is estimated to reach USD 6.6 billion by 2030; it is expected to grow at a Compound Annual Growth Rate (CAGR) of 7.5 ...