This circuit was found in a 1967s Motorola documentation. The circuit regulates the voltage of an alternator for automotive use, for bench applications.
This power supply was found in the same 1990 special issue of Radio Electronics Experimenter...
This crystal radio or modern version of the germanium diode galena radio (of any type) was found in...
This circuit produces the sound of a motorcycle or an outboard motor. The frequency is adjusted in the...