This circuit is from 1973 documentation. The transformer has 500 mA of current and the transistor can be the TIP32 mounted on a heat radiator.
In the figure we have the way to increase the voltage of a 78xx by adding a zener diode. The...
With the configuration shown in the figure, a common 12 V lamp lights up when light no longer...
This low voltage circuit was found in the November 1960 Radio Electronics magazine announcing new...