We found this automotive regulator circuit for alternators in a 1965 Motorola manual. The power transistor must have a heatsink.
This circuit was found in a Popular Electronics from the 90s. Transistors admit equivalents, as well as...
This circuit with two reference inputs was found in old American documentation. Its output is...
To operate with high input voltages using a 3-terminal voltage regulator such as the LM340-15, we...