This circuit is from a Radio Electronics from August 1992. The transistor used allows the control of motors up to about 5 A. It must be equipped with a heat sink.
This stage circuitry for amplifying microphone signals makes use of germanium transistors as indicated...
This continuity tester for low resistances was found in an English magazine from 1978. The circuit...
This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s...