you can use transmiters, to flash with those bulbs, 5V closes the circuit
they are cheap, and if you need only 3 bulbs, you don't need to worry about current supply, I could connect 15 of them, the rest is just to program it how you want to work...
you can use transmiters, to flash with those bulbs, 5V closes the circuit
they are cheap, and if you need only 3 bulbs, you don't need to worry about current supply, I could connect 15 of them, the rest is just to program it how you want to work...