so i am attempting in my infinite noob knowledge to think of a way for a circuit to turn on when a door is open. I came up with an idea but i would like to see if their is a better, more standard, way to do this. Any help would be appreciated.
haha, i was thinking of a reed switch, but how would that work. I thought that with a reed switch the circuit is activated when the magnet is by the switch. I would want the circuit to turn on when the door is swung open, the magnet is away from the circuit.
You can get both "normally open" type reed switches and the "normally closed" type. Most reed switches for security systems are the "normally closed" type; the switch is ON when the door is closed. You want the opposite which is harder to find but they do exist.
You can get both "normally open" type reed switches and the "normally closed" type. Most reed switches for security systems are the "normally closed" type; the switch is ON when the door is closed. You want the opposite which is harder to find but they do exist.
I'd simply use the standard reed switch/magnet assemblies designed for doors and windows and available from a myriad of sources. All the reed switch assemblies for this application that I have provide BOTH N.O. and N.C. contacts. No jerry-rigging necessary.