I did this for fun. Trying to make a signal lights to indicate when the door is closed and vice versa. Maybe someone can find it helpful and integrate it in their circuit :)
How it works: When the door is closed that means someone is inside= RED LIGHT
If you open the door and leave= GREEN LIGHT
If the door is closed but nobody is inside you just pull out the power source out of the socket (or in this case turn off the switch in the primary circuit)= GREEN LIGHT
If you want to completely turn off the whole circuit you just flip off both switches( PRIMARY AND SECONDARY circuit).
Maybe a lil bit complicated but it works, that's what counts :P
