This 80's circuit uses an audio amplifier to obtain a symmetrical source from a single source. The maximum current is on the order of 1.3 A and the input voltage must not exceed 20 V.
Found in a documentation by Hugo Gernsback from 1960, this receiver uses germanium transistors of the time...
Found in Popular Electronics, this circuit is intended for testing servos used in model making. The...
Following the American FCC rules, this 90s Radio Electronics circuit shows how to use a...