My old power supply didn’t have a current limit and was not protected against short circuit.
This is the second time I change the circuit in this power supply, the previous time I replaced the original circuit by this one:
I changed the circuit to this one because the original burned out after a short on the output terminals.
I wanted to have a higher output voltage then the original, therefore I used a 2*12V 2*5A transformer I had lying around (bought it at a garage sale).
The ciruit I’m going to use this time:
The display print covered the entire front off the power supply. Because of that there was no space to put an extra potmeter to regulate the current, so I decided to build new voltage and current meters.
The circuit that I used for that:
For the missing resistor value’s see: fig. 1 en fig. 2.