Radioamateur's power supply

This was my first electronics project after a long period of time when I was interested only in computers. But then, back in 2007, electronics hobby became once again interesting to me.

The parameters of the device are as follows:

• Supply voltage: 220V AC.
• Output voltage: 0 to 30V DC.
• Output current: 5A max.

The device also has overcurrent protection and 2 parallel outputs for convenience.



Below is the photo of the device:


I used the following schematic diagram, which I downloaded from the Internet:


Then I added my own overcurrent protection circuit since the original one didn't work reliably.

The photo of the main board:


I used toroidal transformer as the main one:


The power supply has been working fine for 5 years already and is essential component of my electronics workbench.