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I designed a simple SMPS with a standard transformer: myrra 74050 Up on powering up , it violently blows the fuse and at one time time the AUX supply Electrolytic. Please have a look and help me find whats wrong PCB: Components: Top: Bot: Transformer:

It has been a while. This design is supposed to be simple, almost minimalistic. Mains: 230VAC Out: about 2x50VDC (adjustable, and with other L5 winding could be anything you want) I have some questions about component choice: 1. What is the max current rating I should use for the 12V...