I was playing around with the reed switch on my gizzmo launch interface, and it ultilizes a reed switch, being I've never heard of one, I decided to do some internet searching.
Anyway a reed switch is a normally opened circuit, and when a magnet is near by it, it will close the circuit.
What this is a simple ignition kill switch ultilizing a reed switch, pretty cool I think.
http://www.gnttype.org/techare....html
