我们知道，一个动圈式的电磁扬声器，既可以播放声音，也可以作为麦克风来检测声音。同样，一个直流电机可以将电能转换成动能，也可以将动能转换成电能。那么一个LED是否也可以将光转化成电信号，进而可以当做光电传感器呢？ 为什么提出这个问题？

NEW DELHI: If you are fascinated by the LED sensor lights, then you must be tempted to use them in your home. But, before adopting this technology for your home, you need to gather up all the relevant ...

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 ...

Whether you’re looking for added security at home or easier navigation at night, motion-sensor lights can provide a boost of visibility whenever you need it. The best outdoor motion-sensor lights have ...

Whether you want to add ambiance to your home or just illuminate a low-light area, LED strip lights are a quick and convenient way to do it. The best LED strip lights can be customized to fit your ...

The Standard's journalism is supported by our readers. When you purchase through links on our site, we may earn an affiliate commission. Whether lighting up the route to the loo in the middle of the ...

Ikea has launched a new motion-sensor LED night light in Europe. It runs on one AAA battery, detects movement within 3 metres and is currently available in select European countries for €2.99. UK and ...