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I have worked on Jaguars, Porsches, Mercedes, Triumphs, Opals, and European Fords like the Capris but, I have a liking to the V12 E-Jags and the little Capris otherwise it's American muscle, the more CID the better, I love torque. My boss at the time belonged to several car clubs, sad to say...

So what did I get done lately? Well I blew one of my MOSFETs by hooking it up wrong, stupid old eyes and wrong eyeglasses. I played around with the drive circuit of the gate and I am at 6.21 volts. The Vgs(th) voltage gate-to-source threshold (turn on) is 2.8v to an optimum of 10v. I'm taking...

Your correct for most of what you said. First there is no radio frequency as per say a frequency. The EM pulse covers pretty much all frequencies. When you look at an ignition coil and take the primary first it is not much more than a big electro magnet. You need and want a big magnetic field of...

Next thing is inductance which is where the magnetic field lives and this is always a toss up and a balancing act thing. There are a few good websites on making ignition coils and I'll try to find some active links. Questions that come up are 'how many Heneries do I need for the primary &...

Wow you really know your stuff. One needs to remember that there is no such thing as an explosion right away, at least humanity hasn't found a material that does. I have an old paper somewhere that explains the process of an atomic bomb detonation and even that goes through the deflagration...

I tune for resonance of the primary only in my 48 amp ignition. It works by first opening a window so to say, by window I mean that I allow the resonant frequency of the primary through but only for a set time. It works like a tank circuit that gets big time amplified. Also as the RPM goes up...

Your welcome, no your not miss thinking something, your right it is a balancing act. The best way to think of an ignition coil is to think of them as transformers and not inductors even though they are technically inductors. Everything is a cause and effect so which comes first, what creates the...

LOL, don't worry in electronics engineering school there was quite a few people that had a hard time getting their heads around it. What you see below is what we were all taught. It shows the charge curve in Blue and the voltage drop across the inductor in Purple. As you can see in the first...

Sure, but I must first apologize because I have a bad habit of jumping ahead and thinking that others are following. Your thinking of the di/dt is correct for a simple coil. Well to start the formula for time constants for inductors is for open air inductors and not for cored ones. The type and...

Ok, the next thing that is bugging me is the Hall-Effect/s that people are using and how they use them. I'm not going to go into great detail about how Hall-Effects work, you can do that yourself. Oh, only use a switching Hall-effect, unless your really big into electronics. When working with...

Well lots to talk about today. First I want to say I broke some golden rules when doing R&D. 1. Don't work on things if your tired. 2. Don't let the grandkids bother you while working (Distractions.) 3. Don't be in a rush. 4. Do the math first. So on Friday I received a CDI ignition and coil...

Today I'm going to fix my power supply problem by converting an ATX computer power supply. As I mentioned earlier my old faithful power supply I made when I was a private TQ4 died. I wouldn't mind fixing it for old time sake but, I can build something bigger and better today. I have a bunch of...

Thank you Yup, thanks for pointing that out and I will correct. More on this below. Because "ELI the ICE man" ELI - Voltage(E) leads Current(I) by 90 degrees in a purely Inductive circuit. ICE Current(I) leads Voltage(E) by 90 degrees in a purely Capacitive circuit. When you think about it on...

I would like to point out that desage is correct about the PHE13007,127 transistor and the base current. It takes .550 amps to fully turn it on, not good. I'll have to see what else I have. I'm waiting for parts to arrive from China so I have some time to kill so I'll do some tech writing...

The data sheet for the 3144 states that when it is off it can handle 28 volts on it's output.

That's not what I'm trying to accomplish here. What I'm trying to show is the problems one would encounter if they tried to make an ignition on their own with using basic tools like just a multi-meter. I could very easily simulate a circuit using a spice program and get very close to a fully...

LOL I'm trying. Ray

The KY-003 Hall Magnetic Sensor will work with up to 24v and already has a pull-up resistor and LED. Ray

The A3144EUA-S Hall-Effect has a open collector like almost all Hall-Effects which, means that when it turns on the sensor output goes to ground (-). So 1. I would put a 10k ohm resistor between the (+) and the sensor output, 2. I would get rid of the capacitor. If it still doesn't work then 3...

Yes but how are you going to direct the spark? are you going to use a dizzy? A crank trigger? On my race car I'm going to use both a crank trigger to fire and a dizzy to distribute spark at first. From this I while end up using a shift register to use coil near plug and 8 coils along with a...