How to build a ignition coil driver driver#

You need a rapid change in primary coil current in order to generate a large voltage in the secondary winding of the transformer, and there's going to be an inductive part of that in the primary. Apby mrobbins (NerdKits Staff) Hi huzbum, A reverse polarity diode across the coil may be good for protecting the rest of your circuit, but it might severly degrade your ability to generate a spark. I figure one of those reverse polarity across the coil should quench most feedback. Didn't have any zener diodes or MOV's, so I got a couple rectifier diodes rated for 400v. Apby huzbum I picked up a pair of 2n3055 transistors at radio shack. I'll probably get to it this weekend, maybe radio shack will have what I need and I won't need to wait. I will be adding more features later, but for now this is the important one.

The discussion you referenced has a link to The first schematic looks like about what I am thinking, but with a MOV in place of RC1 and maybe a diode or two between the transistor and the coil.

How to build a ignition coil driver driver#

The coil driver circuit needs to supply 12 volts to the ignition coil (from the motor cycle battery) until the calculated time of spark, in which it needs to brake the circuit quickly and precisely while isolating the sensitive micro-controller from any high voltage feedback coming out of the coil. I will use input from the pulse coil and alternator to estimate engine speed and position then dynamically determine spark timing in software. Mike Apby huzbum I am intending to replace the CDI (Capacitor Discharge Ignition) system with a programmable micro-controller. It sounds like the latter, but I just wanted to check. CDI = - is that correct for your motorcycle? Are you trying to fix the CDI system, or to replace it with an inductive-type spark generator? I doubt that three of the 2N7000's in parallel would have enough current-handling capacity to produce a good spark. I also no longer have the details of that project, but there was some discussion. Apby mrobbins (NerdKits Staff) Hi huzbum, Welcome to the forums! We used a inductive spark generator. Should be some interesting programming once I get the circuitry figured out. I have spares of everything, but I don't need coil feedback killing stuff. I am going to be building a replacement for the CDI module on my old motor cycle (parts no longer available), and I am wondering if 3 parallel mosfets from the kit should be able to safely drive a 12v ignition coil, and what sort of circuit protection would be best. A broken power or ground wire or a failed coil driver can all cause the same symptom and the.Īpby huzbum I have not even opened my kit yet (it came today) but I would like to get started on the coil driver circuit design so I can order parts if I need to. Coil-on-Plug Ignition: The Art of COP Misfire Diagnosis Posted on. Thank you guys anyway for trying to help me.Just a simple ignition coil driver i was playing with powered by a dimmer switch a a capacitor and 2 ignition coil. I do my best to learn more about electronics, because I have the intention to construct a 'Hubbard Coil'Ī learned that a device like that needs an alternating high power to operate, so the first thing to make is a driver for the car ignition coil who drives the Hubbard Coil with high voltage and alternating current. That does not combine!įor now, I am trying constuct an other driver and using some other schematics wich I found on the internet ( Google and Youtube p.e.) It has a Photocoupler as a 'timer' or so, and I thouged it was a 555. Surfing on the internet I just learned that in the case of this schematic that I used, it was totally wrong!

I found a schematic on the internet and start to try construct anything.Now I can't find that schematic anymore as I destroyed the original. I don't have any experience with Arduino and carcoil ignition drivers. I do must me apologise for my first post that day.