Hi guys. I've got a problem. I've built Rohmell's cdi twice now and I tried building the jag one also. I'm not getting spark from either. Then when I hook up the original Cdi it works with no problem. Could it be the Chinese coil I'm using or could it be that the original stator coil isn't producing enough volts.
Please help me out, I noticed in the first circuit you posted a 33 Ohm resitor was present. The later circuits it is not present. At first I tried the circuit with the 33 Ohm resitor but no spark. Eventually I came right after removing it. Is the purpose of this resistor the limiting of current on the Gate Resitors?
I must say this circuit performs very well givven its simplicity. I used a Yamaha Generator Ignition Coil.