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Same here, all my experience has been with single cores. I have an RTOS that I had a hell of a time to get from STmicro but, it is the only one certified by usULc that is free for life critical operations. I have been reading up on it and I think your right that an RTOS is needed for multi-core...

Your correct. :) I'm still trying to learn how to do interrupts with dual & quad cores. I haven't had time to figure that one out yet. Hopefully I can have 1 core handle some interrupts and the other core handle some other ones. Any ideas? Cheers Ray

Using an interrupt stops the uC from executing any other code until the interrupt is finished. Calculating the ignition delay/timing isn't that easy trust me I've been there and done that. The actual processing time must be found out (measured) and it never changes unless the code changes, a...

It seems your forgetting one thing - the amount of time the uC takes too calculate all the variables and lookup/s. This time will have to be measured and subtracted from the delay calculation for accurate ignition timing. I have done this using both counting clock tics (@16mhz) and just...

Sounds like you and I are doing almost the same build. I'm using the Nano right now just for development and will be doing the same as you but I will be using the ATmega32U4, basically the same but more interrupts. I wrote a program in VB6 to work with the PIC12F1840 and need to convert it to C#...

If anyone is needing more info on the LS1/2 coils here are some links that explain more about dwell timing requirements including using coil charge voltages from 6v to 16v. The testing I have done so far is with 5v and 12v signals and can say that both voltages work fine. From what I have read a...

Well for starters those are Coil Near Plug (CNR) coils, no biggy. I've been real busy lately and have not done much but work on business stuff and working on my patent that has nothing to do with ignitions. But 3 future ones will. I'm just getting back into my ignitions so I'll be doing some...

Here are a couple of articles that might help you, mostly the first one. Ray

Bentwings are you going to use the emersion heaters dry or wet? A few years ago I almost bought a business called "Red Devil Heater" which made heating elements of enclosed tubular and open elements. I learned how to make all kinds a heater elements before I got a chance to look at the books...

It's something that would need to be drawn up on CAD. I have all the factory manuals which include all the dimensions. Each cylinder is pretty much a 9" bore x 10" stroke so I was thinking somewhere between 1/6 and 1/10 scale. Ray

My one boss/foreman was a diesel tractor puller and was telling me that he was @100 psi boost on his tractor and some guys were over 100 psi, wow! He also really hated the turbine guys. Ray

A little more on the GM-EMD diesel electric locomotives. The diesel engines come in 2 versions for the 2 strokes. They either have roots blowers or turbos. Each is ran off the camshafts except, the turbos use a over-running clutch that usually disengages @ 6th throttle and allows the turbo to...

I just wanted to add my 2 cents worth. I worked for the railroad for 8 years as an electrician and most of our locomotives had dynamic braking. This braking turned the motors into generators and this power was sent to the resistor grids. This setup also allowed us to use the grids as a load to...

I agree with willray on this one. Without some electronic-mechanical way of knowing when on the compression stroke there is no way to sync the ignition to the compression stroke other than manually. That is the reason 4 stroke engines use a cam sensor for synching the ignition. Spurious noise...

What is sorely lacking here to fire once per 720 degrees is synchronization of the compression stroke. The ignition would need some way to know when an engine is on a compression stroke. One could use 3 Hall-effects, one for each rocker or push-rod and one on the crank. Then connect them to a 3...

That is pretty much what I need to do for a couple of projects. Nice work Barrie. I believe the Ender 3 printer I have coming comes with Cura. Well I just learned to crawl by completing the Alibre tutorial and was impressed with my results. I'm still nowhere near what I want to do but winter is...

Everything for some reason is now working fine, go figure. Thanks everyone. Ray

I knew something was up when I had problems installing Alibre but I was hoping it was just the install program having problems. I know Alibre is a low cost program but it should still run properly at least most of the time. The tutorial could be better by being updated to the latest program...

Ok, I deleted the part and started the part again and it went ok until I saved it. I then had to restart the program and it's working ok again. This is not good for a commercial program, one that is not free. Ray

Yah Alibre says that it can produce STL files for 3D printing but I'm not sure how well that would work out. Everyone seems to use a 3rd party slicer. I'm use to working with G-code myself and I'm not familiar with the STL protocol. I did download SuperSlicer and PrusaSlicer but haven't had time...