Yeah there should be lots of smartbulbs these days. But for older ways, there's relays and SCR/triac type stuff, which I don't have laying around.
But what about wall mounted devices, that would flick the switch, with the use of a little motor, or spring, or electromagnet to release some latch, etc. Does anyone try making something like that ? I sometimes think of trying to make such a thing, but IDK, I walk by the switches all the time anyways.
I would like to make an alarm for my stove, and my house doors too.