So I'm sure here's already something that performs this function, I just don't know what it's called.
I'm thinking of an on/off switch, that takes an electronic signal to switch. But it uses power only to change the state of the switch, with no power needed to hold either position. So it's not a relay. Unless that's what those solid state ones do.
If I were to make such a device, maybe a relay with 2 coils on either side of a free floaty switch lever with detents, or maybe a clicky rotaty wheel thing that advances a bit each activation.
What's out there and what are they called?