ZSM-20 - Do-it-yourself kit, adjustable power supply unit 1-25V

The kit presented is based on the standard application of the LM317T.
If an external power transistor is connected, the current can be increased to 3A.
If an additional volt and ammeter is installed,
the device fulfills the role of a laboratory power supply.
The short-circuit protection only applies to the LM317T
PCB: 70x50mm.
Recommended transformer: TRT50215.