Hi everybody, I was asked to build an electrical oven temp/time control, and I do need a small switching power supply for powering uC. I was reading a lot lately how to design one, but what I see more complex is to dimensioning the high frequency ferrite transformer. I am looking for help, some docs, sites, or info about ferrite transformers I have seen so many, I dont know how and what to choose. Thanks a lot . Basic requirementes are 12v for relay (4 relays) , 5v for uC and 3x7 segment temp display and 4x7 segment display for timer.
Thanks in advance