Spark
Igniter
The spark igniter is a design I found on the web. It uses a 12v car ignition coil, a capacitor (about 1 to 3 microfarads - I used an old microwave capacitor) and a household lighting dimmer switch. In use, it produces a good strong spark stream through a standard sparkplug and will easily ignite the propane gas mixtures I use in my engines.
Warning - This device WILL give a powerful kick (I know!) and should also be housed in a strong container to catch shrapnel in the unlikely event that the coil dies. I have run one of these continuously for several hours without mishap. I may have just been lucky - you have been warned.
To use the coil connect a standard spark plug lead from the terminal on the top of the coil to the sparkplug. Connect a wire between the sparkplug body to the ignition coil body. Turn the dimmer switch until sparks start at the sparkplug.
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