DIY LTCC or similar system for LT1s

[vilefly]

I don't want to get lost on a wild goose chase here, but if you can give me a birds-eye-view of what you're wanting to do here or point me to where you explained it / posted info that would help. If I can at least try to wrap my head around what you're needing to do electrically and logically it would help. If I have a handle on what you need to support your goal it will help so that the next round of optimizations doesn't eliminate the possibility of meeting those goals.

Incidentally, ATDC isn't currently tracked, nor is angular velocity at any resolution higher than every 90 degrees. As the code stands now, it counts down from 90 after each TDC (low res rising edge) signal. So 16 ATDC would be 74 degrees BTDC (of the next cylinder).

Well, technically all I need is an output pulse every 16*ATDC (74*BTDC) as a single point of reference for all the cylinders. I will either manually scope or "arduino-scope" the ion sense signal to find out if peak pressure occurs at the right time using a second arduino-pro to do so. Eventually, it may evolve into a closed loop system that can more accurately detect knock as well. It might be worth something to others to make that output timing changeable so that they can enact their own evil plans triggered by this pulse.
ion sense ignition waveform.jpg
ion-sense-ignition.png
The ion-sense power supply/circuitry might change to the Delphi method of capturing the 400v kickback and using it to power up the spark plug, but for now, this is a crude representation that has already worked for me in the past......but my 300v power supply was very noisy last time, and I will see about regulating it and smoothing it out.
delphi ion-sense ignition.jpg