Category: Schematics

The Radio Electronics Magazine

Radio-Electronics was an American electronics magazine that was published under various titles from 1929 to 2003.You can Read them all here. Radio-Electronics was aimed at electronics’ professionals such as radio and TV repairmen. And...

Circuit Exchange International

There are ten categories of schematics, a unified circuit analysis, design and theory page, and also a practical electronic section. The simulation section features the “TINA” and “Circuit Maker” programs. (this is a first...

G-switch timer – Vern Knowles

The timer is built using four small inexpensive CMOS integrated circuits. This allows it to run on just 3V from two small AAA batteries. U1 is a 74HC688 8-bit equality comparator. It compares the...

Flashing Mains Neon Lamp

Here is a Neon Flasher circuit (untested) for a user request at Elex Quna. This can be built into a switchboard or a gadget for indicating Live Power. D1-C1 form a simple half-wave rectifier,...