PSU : prices and differences

[Jonathan]

Your the MOD and resident electrical genius so Get on with it then.!!

I think the point we're making here is that you don't need to be an electrical genius to do this, you just need clear instructions. Therefore we need someone who can explain things clearly, but you have made it apparent that that's not me, so I'll just contribute with this circuit diagram:



Two versions depending on whether the transformer secondaries need to be placed in series or parallel to obtain the correct voltage. Two capacitors pictured, but more/less may be needed in some cases. I put in the NTC thermistor for soft start, which is optional for most size transformers in this application. I see no reason to put a fuse on the output since all the drivers I've dismantled (PM752, PM542, DQ860MA, AM882, 2M880N) include their own individual fuses, however it may be sensible to include one in case somebody decides to use the power supply in a different application.