A few years ago, while watching videos on electronic DIY projects online, I happened to come across a video about a homemade trench radio. A trench radio is a radio without a power source that ...

This is a simple fire alarm circuit using Germanium Diode and 555 timer. In this circuit Germanium Diode plays very important role in detecting the fire.This is a simple fire alarm circuit using ...

Programmable photonics devices, which use light to perform complex computations, are emerging as a key area in integrated photonics research. Unlike conventional electronics that transmit signals with ...

The classic crystal radio was an oatmeal box with some wire and a few parts. [Michael Simpson] has something very different. He found an assembled Philmore “selective” radio kit. The simple kit had a ...

Fans of higher-gain germanium circuits may be disappointed in quiet germanium side. No setting for blending the germanium and silicon diodes.