Thread: Open Hardware COP controller

When I first started working on the Coil On Plug conversion for the SR20 I did so out of pure interest. Once it actually worked, I was then interested in making money from it. But I haven't, and this cagey one man approach to product design was foolish and did nothing but make the community look towards this as another hopeful not being able to deliver. This controller will never make me rich, nor any sort of impact financially on my life. But it will bring me closer to building a portfolio to market my abilities. So with that I have decided to open the schematics for the COP controller. With these schematics you will be able to design your own PCB's, order your components from any vendor you choose, build and customize it to your choosing. Alternatively, you can purchase from me in the form of a completed PCB, or in a kit that you can put together yourself(a link will be provided at a later date).

Think of this as a Hackerspace.

I will start rolling out schematics by this weekend.

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nice initiative, hopefully it'll help you get traction on this!

good luck

If any one is interested in how Nissan was able to make the distributor-less ignition system, take a look at their patent drawings from the 80's.
To summarize, the crank sensor provides a position and a count. The position signal tell the shift register to progress to the next position, the count told the ECU the degrees BTC. Once the ECU compares the count to the register it sends an ignition signal to the distribution unit. The distribution unit takes the count AND the ignition signal and activates the ignition process. Don't pay much mind to how they triggered the event as its some backwards ass system that took my professor a minute to figure out.

https://www.google.com/patents/US4502454?dq=distributorless+ignition+system+conversion&hl=en&sa=X&ved=0ahUKEwjx_sq0m8LJAhUDoD4KHUb2Dw04FBDoAQhaMAk

Thank you for making the entire project open source! This is great news for myself and the other DIYers out there.

For those of us that this is a new concept for, what's the actual advantage here? Stronger spark seems to be the only thing I can think of. I read through the linked patent where they talk about eliminating power losses, but that really doesn't seem like a big deal?

Good job on reverse engineering this, I always love a good hack.

The site OP posted says something about a loss of power through the "joule effect" with the old system

@jimbo_se-r the idea is to eliminate the stock distributor system. Its a great system stock and can provide a lot of spark for high horse power builds. Its antiquated though, and digital control of the ignition system allows for better control with currently available tunable ecus. It also looks nice and clean. But the goal has been to do it as cheaply as possible.

So my initial design was to count every pulse from the 360 degree window and calculate the engine position using discrete logic. This made for a massively complex design, I don't think I could do it again. I mean when you hear brute force, this is it. It works, but it was crude. I was so far out of my league I didn't even know what components to use. This is literally AND, OR, NOT, and INVERT logic gates.

You must be an electrician, no? Good work. (Not that I understand most of it)