[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 ...

[Andrew Lamchenko], who has built a number of small e-ink-based sensors this year, released another design called the eON Indoor Air Quality Sensor. As his previous sensor designs, the eON boasts a ...

Buy Oil Pressure Sending Unit Tool Set 7-Piece O2 Sensor & Oil Pressure Sending Unit Socket Set - Master Sensor Tool Kit ...

Colombian citizen scientists built dirt-cheap air quality monitors and deployed them across their city, forcing the government to confront its pollution. Now they’re teaching others to build them, too ...