I’m actually genuinely curious about this – not for blowing up USB devices, but rather as a tiny 5V to 200V boost converter. If it puts out a clean signal and doesn’t eventually blow itself up it could make an awesome miniature power supply for high voltage applications.
Looking at the picture there’s clearly some caps, an inductor, a diode, and a few resistors. On the bottom right it looks like a FET of some kind, but I wonder about the two ICs above that and what they do. I’d assume at least one of them handles the pulsing to the inductor but I’d love to see a schematic or at least a zoomed in view showing the IC’s part numbers.
Here’s a pic:
