My venture was directed to latching relays. Dual coil, because the mcus I have don't do negative voltage and I'm not going to go to an h bridge when dual coil is an option. I bought a variety, but I am frankly enamored with this one
It's flippin neat. Put ~10ms of 5V @ 28mA and it switches, then stays put. Put the same on the other end, and it switches back, stays put. No energy drawn to hold position.
I was astonished at how tiny these things are, since all I had are the Songle relay modules everyone has.
Anyway, rated to handle the AC. Weirds me out that it's a dinky pin to pass mains level AC....