Found in a 1980s American documentation, this circuit appears with variations elsewhere in this section. The circuit activates a relay according to the supply voltage.
With this circuit it is possible to have a symmetrical source from a simple source with voltages from...
The basic idea of the circuit shown in the figure is to increase the brightness of an ordinary...
This regulator can use BD'136 as the main transistor and as a reference next to a BC548 zener. The...