Ever wanted to build a touch table or other touch-input ... in the path of a single IR LED facing a sensor array of either type will block the light from reaching the sensors.

The sensor also detects liquid water with similar ease, either in the form of pooled liquid, or filled bottles. We’ve also seen a spring elegantly used as a hidden touch sensor that works ...

These LED puck lights have 16 different light colors and four dimmer settings. Some puck lights can be turned on and off with a single touch ... motion sensor, or automatic shut off after two ...