I've just come across a no-name non-contact, high-precision 80 GHz mmWave radar sensor for liquid level detection with a 40m ...

A better display and a temperature sensor accessory make Nest's Learning Thermostat more appealing.

At first we made a simple construction comprised a rubber tube, plastic funnel, water flow sensor, and water bottles. Next we connected the water flow sensor’s output to the Arduino board (filled with ...