Using 9V. I have an old stun gun that will produce 10KV, but the only problem is I can't get it fast enough. The electrical pulses it produces are roughly .5-1.5 seconds apart, it depends on air moisture, temperature, etc.
It wasn't made from the best parts, but if needed I can buy better, I just need one that will discharge the capacitor every .1 seconds or possibly less, the only way I can trim it down is by dropping the capacitance level, and if I do that, I may blow the capacitor, or possibly one of the diodes or transistors.
The circuit itself is very fragile, and using it 10-15 times has left scorch marks on the PCB, which is why I want to drop the voltage to 1K, only problem is, to do that I'd have to get a new transformer, and since the transformer has no markings other than one that says 18, which is of no help, I can't decide what to do with it.
My original plan was to use this circuit as the power supply for my project, but it's neither fast or reliable enough to use.