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 ...

The Klon Centaur. It’s one of the most elusive overdrive pedals in the history of effects, and though there are already countless copies on the market, it continues to be the subject of replica ...

A crystal radio is basically a high Q resonator tied to an antenna and an envelope detector. These days the envelope detector is a point contact diode such as a 1N34 Germanium diode. The resonant ...

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 ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Fans of Fulltone’s much-cloned OCD circuit will know there are a variety of versions available, ...