This circuit for currents from 500 mA to 1.5 A was found on a Ham Radio from the 90s. R4 determines the current in the load under test. Transistors must be equipped with radiators.
Found in a 1991 publication this circuit can be assembled with more modern components. We can use...
We found this circuit in a 1987 documentation. Its purpose is to turn on a garage light using the...
This is the circuit of a turntable from the 1970s. We found it in a repair article in the December...