Step 1: Lets Start With the Bacics
OK, an ignition coil (or spark coil) is a type of induction coil similar to a Tesla coil . it's used in combustion engines. and produces up to 50,000 volts (a 2-4CM spark) at a lethal current of 25ma.
to power it, you need a square wave. you cant use standard AC because the coil WILL EXPLODE!
Step 2: How My Schematic Works.
This is how my schematic works: heres is a schematic that shows what the capacitor does. This the first schematic. It is a good driver for making big, hot sparks (not to be confused with arcs).
Step 3: My Schematic (cheap and Easy)
this is my schematic its easy, but it, with my power source, only makes about 20 KV (1 inch ark) at a low fixed freq. it's also noisy but still very cool. this makes VERY small streamers due to its frequency. and makes cool plasma globes out of light bulbs.
Step 4: A Super Simple Driver
this ridiculously simple driver with no doubt simple,and exceptionally cheap and can easily produce 40KV! there are a few disadvantages with it, its mains powered, making it dangerous, and the frequency is not adjustable.
Step 5: 555 Timer Driver
Another popular coil driver is the popular is this 555 timer driver.
it oscillates a transistor that drives the coil. its a little more costly and complicated but its overall relatively simple.
you can tune the output by the POTs. I haven't made the driver yet
Step 6: Another 555 Timer Driver
Here is another 555 timer driver. There are a few more components added and changed.
to me this is the most complicated circuitry I found.
Step 7: SCR Driver
now, the SCR driver.
this just makes static like sparks and works by charging a high voltage capacitor and then discharging it through the ignition coil.