/diy/ - Do It Yourself

>>1226344
>same efficiency as a fixed-ratio converter followed by a linear regulator
Just what I was thinking.

>>1226352
Not flyback converter, transformer. A flyback transformer simply refers to a transformer where the output waveform is not intended to be the same as the input waveform, while the converter is a DC converter. Unfortunately, I can't find any information on the voltage output of a square wave fed into a transformer unless it's got an AC-blocking diode on the secondary, especially in regards to the turns ratio compared to the voltage ratio. I tested it in spice and it told me I'd get an exact voltage ratio with in-phase square waves on both sides, but I'm not sure if that's correct. Pic related. So is this not to be classified as a flyback transformer at all? I thought output waveforms had derivatives or something in there, because inductors I guess.

>>1226375
Photodiode and FET controlling the power? Or a half-LDR voltage divider to trigger the FET. You'd barely be wasting any power if you do it right, and it wouldn't activate on dark days.