Hi all: I'm trying to make an electric rat trap with a car ignition coil but don't really know how to make the coil produce the spark?. just wondering if anyone would draw up a diagram for me to help me along a little!. Also would a 12v DC to 220v AC inverter wired to 2 metal plates do the trick?. any help would be more then appriciated. Thank's guy's. Tezza1.