This 1.5 A circuit has the output voltages adjusted by a selector switch. We found it in a Popular Electronics from the 90s. The integrated circuit must have a heat sink.
We find this circuit in an American 1980s documentation. Integrated circuits are uncommon today as...
The power transistors of this 80's circuit should have at least 10 A current collector and mounted on...
This two-transistor circuit was found in a 1969 US documentation. Modern equivalent transistors can...