This automatic switch for multiple loads was shown in the May 1983 issue of Radio Electronics magazine. The circuit is designed to switch multiple electronic devices at the same time.
This circuit controls the passage of the signal from an input to an output using a DC signal from a...
This amplifier with two transistors and unity gain was found in a 1974 Ferranti transistor manual....
Found in 1980s documentation, this circuit uses a small transistor radio output transformer and a double...