Hi,
I'm in the process of building a bench power supply, nothing fancy. It will be a small (in size as I don't have much space) and in power (I don't really need much, just 0-15V 0-1A).
Trying to cut some cents here and there I split the design in 3 boards. My idea was (is) take advantage of the ridiculously low prices on pcbs (usually less than 100x100 mm) for the variable regulator and the control board and use a perfboard for the power board, as it is a lot simpler.
I've attached the schematic for the power board (the other boards are not done yet, I was just trying to put the first part together).
The actual board is in my trash bin as the "debug" process went mad an I ended up desoldering all the caps just to realise that all 4 were shorted (they were brand new before soldering).
I've also blown 3 fuses in the process until I understood something was totally wrong ! How did I do that ? No idea, I'm totally puzzled, I followed the "tracks" 100 times and did not see any flaw, so I'm asking because I think it should be in the design itself ... (first time I play with transformer + bridge rectifier and all that). But I'm so blind by now that I see nothing.
If somebody sees something totally wrong with this, I would appreciate the help.
Thanks.