This uses the low cost ABS sensors. Having a bunch of them like this means you don't need a computer. They automatically trigger the CD capacitor one after the other 20 degrees apart for both rotors through out the RPM range. The two at 3 o-clock and 9 o-clock trigger the 555 fuel injectors for front and rear rotors. If one fails no big deal the engine will still run. If one of the ignition triggers fails you might not even notice just the fuel burn may be slightly higher.
Now I need to figure out how to mount the blue ring on the engine front cover.
Paul Lamar
Paul, How will it advance the spark? Blake
-- Blake C. Lewis
I am working on a optional mechanical advance like a Model T. Done with a push pull cable much like a throttle cable.
Not necessary unless you want to optimize fuel burn at high altitude. Most mags have no advance.
Paul
Paul,
The thing to remember is that the Hall Effect sensors will cause
the spark to advance slightly as the rpms increase. The leading
sine wave reaches trigger voltage sooner at higher RPMs. Kawasaki
used this effect on their magneto CDI sy
stems as the only advance. Set the gap, (if adjustable), to the
widest setting that will reliably start the engine. At max rpm,
say 7K for us you will see as much as 10° advance.
Bill Jepson

That may be true but these are not hall effect sensors.

Paul Lamar