A typical LED diode consists of the actual light-emitting LED chip, which is surrounded by a transparent protective domed casing/lens. And while much of the light produced by the chip passes right ...

LED lighting technology is increasingly adopted for its energy efficiency, durability, and longevity, making it an ideal solution for modernizing urban areas and developing smart city infrastructures.

The simple Diode and LED Tester presented here costs under £5 to build (including all components, the battery and a cheap case) and will indicate the polarity of almost all types of LED and other ...