this project is not yet finished, as I await the arrival of the PCBs and parts from DigiKey, then having to assemble the board and program the uC. once that is complete, I will write about it on my website, as I have with the first version.

this one is based on a flyback power supply with custom transformer, as in https://tilde.town/~vivienne/journal/2025-08-29-MC34063-flyback.html .