Hello fellow arduinoheads,
I'm trying to interface a reedswitch / magnetic door alarm w/ the arduino. I've been fiddling around and I'm finding that the voltage going to the speaker alarm is likely too small (under 1v then drops to 0 when the switch is closed (door is closed)). I've thought of putting the reed switch itself on the analog input and reading it's resistence? Is it possible to use a pull-up resistor to bring the voltage closer to 5V?
Thanks for any help!