We found this circuit in the Electronics Experimenter Handbook 1983 edition. The circuit uses common components and has several features.
This circuit is suggested by Motorola and is based on a 1723 voltage regulator. The 2N3055...
This circuit is indicated for applications powered by 12 V sources. The battery is 12 V according to...
In this circuit, from a documentation from the 70's, we have the way to control the active cycle of...