Pilgrimman wrote:If you want a truly semi-auto combustion, i.e. fires as often as you can pull the trigger, you would need a single switch to complete a circuit for a chamber fan or other venting apparatus, a circuit for electronically controlled fuel metering, and a high voltage sparking device. The changes in voltage between the device would be extreme, so it'd be very difficult to pull off. However, if you can find a way to do it, more power to you!
it's called a relay. most automotive lighting accessory manufacturers use them to control many lights. they can even control more relays. all you would have to do is design each system and then actuate them via one relay switch.
i'm sure if you search through the forums you can find an example of each system, then modify it to your needs.
remember to use these posts as guidelines not gospel. some of the members really do know what they are saying, others are just cavemen who stumble upon fire.
good luck