This is a very simple touch sensor switch that is build with the 555 timer IC. You just need to touch the metal plate and the relay gets energised and is kept in this state for about 100 seconds, then ...

The circuit was designed to produce a universal infrared switch with a single channel and ON/OFF feature to operate in 36 kHz to 38 kHz in the form of a remote control. Infrared – a portion of the ...

This article is part of the 2022 April 1st series in the Humor topic within our Series Library. The ubiquitous 1971 digital miracle—the 555 Timer—is important, replete with 25 transistors, 15 ...