I'm looking to create a simple circuit that uses standard 5V ICs, one of which I can use to control a standard 120V/60Hz AC power line. I know these kinds of voltages are dangerous, so I would like something that includes some kind of protection (e.g. the components are all sealed).
I'm also looking for something that can take the same 120V power and provide a 5V DC supply for my circuit.
I'm trying to create a circuit that uses a 555 timer to control a 120V light bulb, and I want to interface that with a standard light switch. Since I don't know what kind of device this IC would be called, google isn't helping me.