Found in Popular Electronics from the 90s, this circuit has LED indicators that show when the battery is full charged and the shutdown relay is activated.
The transformer inf this circuit is a 6 or 9 V unit and diodes 1N4002. The filter capacitor is 2...
This vibrato circuit was found in Motorola's 1966 documentation. The circuit uses transistors of the...
Found in a General Electric documentation from 1970, this circuit consists of a relaxation...