This circuit was found in American documentation from the 90's. The transformer determines the output voltage. The transistor must be equipped with a heat sink.
The power transistors in this circuit can be BD135/BD136 or TIP31/TIP32. The circuit is from an...
This circuit was found in a 1981 publication and consists of an interesting handicraft game. The...
The transistors in this circuit, found in an American publication in 1975, can be replaced by...