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 was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...
This source was found in old documentation, based on a regulating integrated circuit popular at...
This circuit found in a 1981 documentation consists of a transistor tester of general use and that...