This simple charger was found in a 1980s documentation. The transistor may be the TIP42 with a heat sink. R1 adjusts the load current. The transformer has 1 A of secondary current.
This circuit was indicated in an old American publication to serve as a Laser alarm system as a...
To control direct current loads, under voltages between 12 and 200 V, and currents up to 3 A, we...
The purpose of this circuit is to keep the courtesy light of a car on for an additional time given...