I build a stereo amplifier module and found myself in need of a power supply. For this project I did not want to use a big piece of iron to power it so the next option is SMPS. I decided I would start simple with a push pull step up circuit, 12VDC to +/-30VDC. The toroid cores I ordered were slightly too small as the plan was to stack two as one transformer. It turned out that I need to get the 1.5cm high cores instead of the 1cm size. So, more just for fun, I made 3 transformers equal and connected them in series.((@. To my surprise it seems to work well. Also a quick sketch of circuit. The plan is to model the PWR supply out, tested, before doing the PCB with the CAD program. Most certainly there is room for improvement, my skills at SMPS is rather novice tho. :ambivalence: Although, it did work first time it was connected so maybe just luck..6
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