Hi,
Could this technique be used, theoretically, to drive a much larger current, if instead of taking the pin directly from a micro. it was from a suitably rated H-bridge (or half H-bridge) chip? Assuming all caps and diodes are suitably rated?
Those chips also usually have a current limit built-in, so they won't get fried so easily.
I know this was originally intended for driving tiny loads, but what about, say, a motor which draws 1-2A?