Volt to HOT kiloVolt arc generator

Well I have something similar built up at the moment. I use an 555 to creat a fixed frequency of roughly 210Hz (Seems to be the best frequency for my ignition coil) with a duty cycle of 10%. This is just for regular use and can be replaced by a VCO or a function generator. Just for protection I put in an optocoupler before the gate of the FET, just in case. Some caps, pull down resistor and a zener on the MOSFET which is low side switching the ignition coil. The FET is on a huge heat sink with thermally controlled fan, (45°C) but it never got that hot yet. With a 30V 10A supply it can draw arcs close to 5cm which is pretty good I guess. I use this for alot of HV vacuum projects and plan to do sputtering with it in the future. I guess I'll have to replace it for that tho. Anyway your circuit is pretty close to somthing workable already.

@Violationmad, wow, that's cool to know that this type of diagram will work. Could I Have your Link? Actually I need more information to make a project like Sparkplug tester, or something like that. Please help for more Information.. please..

I didn't make an EC circuit for this. If I find some time I can redraw the schematic and upload it somewhere.

Its really not that complicated. The 555 is just a fixed signal source optimized for the ignition coil. It can be replaced by any suiting signal source, also something audio modulated. The optocoupler it's just for protection of the signal source and is used like in any other application. The FETs gate is protected with a zener against overvoltage and a pull down resistor to discharge the gate capacitance. There is some more stuff but I don't remeber on the spot. I'll have to revise it anyway as it's just a quick perfboard solution now. I'll upload somthing if I come up with a proper and adjustable solution.