I am sorry Hayato, but lets look at a tipical 4 cyl, 4 stroke engine.
going down the road at 75MPH my engine is running at 3000 RPM's.
Now the math: coil has to fire 4 time per 2 turns of the crank. or 4*1500
already up to 6Khz. now what happens when I rev the engine to 7000RPM's?
7000/2*4=14Khz. what about the old 8 cyl engines @ 5000/2*8=20Khz
But who am i to argue? The 2N3055 Transistor? Great high power device.. but the circuit I am talking about is already working. I was just thinking all I needed to do was change the timing. If 4Khz to 5Khz works best on an ignition coil then I am game to try it. I need to know how to figure out the frequency. Could someone give me an example?
I will post the full diagram on this puppy once I get it running.
And thankyou Russlk, I didn't know this.
Hayato, you may find that the transistor you are using is your biggest problem. If you can get either the NTE 284 or a KSE13009, I think you will like your project a whole lot more..
Till next time.. thanks guys...