Found in an American publication from 1968, this circuit can be made based on a TIP42 that must be mounted on a heat sink. The transformer is 25 V with a current of 3 to 4 A.
In the figure we have a circuit that allows us to obtain a variable voltage of approximately 0.5 to 25 V...
The purpose of this circuit is to emit infrared pulses. However, LEDs for visible light can also...
This circuit appears in other articles and suggestions for circuits in this section from other...