As mentioned by the thread author, a common solution is to simply add a capacitor. It was probably battery powered, and if so, would give an asymmetric waveform like that from an ignition coil. This is due to the ‘roughness’ of the copper – very small sharp kinks in the wire lead to the build up of charges, and when this charge builds up past the dielectric breakdown threshold of air, it shoots off a minute stream of particles into the air, also known as corona. I have run in to a problem with the very low coil resistances of small inductors. The only differences though is that is uses only 1 2N

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This is what you have in a typical ignition coil driver to make your arc. Should I remove this resistors or replace it? The way you have shown VR1 would just give the same resistance all the time.

I designed this ignition coil driver circuit based on something I saw on the web a long while ago. The power supply unit I coli using limits the current at 3A!

Even with some insulation, at full voltage there is some arcing everywhere over the tops of the coils. I have the gate grounded with 10K ohms, and when I remove gate voltage the ignition coil sparks. The voltage is directly related to the rate of change.


Would it be across the primary terminals of the coil, or between the collector and emitter of the power transistor? Smaller coils usually work better at higher frequencies. The resistor will prevent the transistor from blowing and the capacitor will block DC.

If you want to change the capacitance by connecting capacitors togetherconnecting them in series will reduce the capacitance. At this point, the trace on igintion scope looked like an almost perfect sine wave. The impedance of the coil increases with frequency. Hey, I recently finished you driver circuit [the simple cool, but when I turned it on, the diode started smoking and eventually cracked in two.

Ignition Coils (Penguin’s Lab)

I have built the ignition coil driver circuit posted on your website 4th dec and I am getting a good spark with a spark plug. At one point I was using a 1MFD capacitor and no resistor. Also maybe the diode is not great. The frequency generated by the self resonating circuit is equivalent to the HF drive signal, but if you start trying to modulate this the feedback loop will become unstable and therefore cause the drive frequency to change.

If they are blowing up, it is most likely due to over heating. It should still work noticeably.

+mosfet+ignition coil ignition : Hybrid Cannon Discussion

And would you recommend using ,osfet or two batteries? Not sure what type it is??? Why do we need pre-amplifying transistor? I have tried this with and without the diodes running for a sort time and when the diodes are in place, they get very hot, showing that there is in fact a lot of current going through them.

Recent Drivers  NEW DRIVERS: DX2300 AUDIO

This would explain the lack of current drop. I noticed when the coil was operating that a lamp that was pugged into igjition wall was flickering on and off very fast the switch on the lamp was off, im getting feed back into the house. SpudFiles skin originally developed by: A bigger battery wont improve performance but would last longer. The output waveform frequency seemed to be 55 what the input frequency was about 1kHz and the resonant frequency was calculated to be at approx.

DIY Ignition Coil Driver

The difficulty in what you want to create is the variability of it. Since then it has stopped working.

Can you explain this and suggest an alternative way of measuring the secondary current. You get a spark, but the coil goes into saturation wasting most of the energy. There needs to be another wire returning to the other connector of the 9V battery to complete the circuit.