Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

This circuit shows how to use an ordinary LED as a light sensor. It makes use of the photovoltaic voltage developed across the LED when it is exposed to light. LEDs are cheaper than photodiodes and ...

Last time, I disassembled the “wireless” (i.e. six AA battery-powered), touch-activated member of Jasco’s GE Enbrighten LED-based lighting product line. This time, the “plug-in” motion-sensing variant ...

IKEA has launched its new Gömpyssling LED light with sensor. It's a motion-activated light which automatically switches on when you open a cupboard or step into a space, then turns itself off after ...

Kerala’s Minister for Local Self-Government M.B. Rajesh on Wednesday inaugurated the Pan City LED Street Light project, under which conventional street lights have been replaced with over 40,000 smart ...