EE question...D-Jet related Options

[Mueller]

What I want to do is have 1 12vdc square wave input, with a "splitter" that will alternate between 2 outputs, I want to do this electronically, and not with a Hall type sensor going high or low to reset

[lapuwali]

You trying to simulate trigger points? Sounds like you're messing with that new RUNNING car already.

I don't believe the D-Jet really cares which pair of injectors fires on what cycle, just so long as they alternate. If that's so, it makes the problem a lot easier. If the D-Jet runs like crap with the signals 360d off, however, you'd need more than just a plain square wave in to make this work.

Assuming you don't have to worry about position, just alternating, you'd need something like a flip-flop to provide the alternating, and I'd use a pair of transistors (one for each output). There are some unanswered questions like what's the dwell on the trigger points, and does it matter? Do we need a variable-width pulse based on engine speed, or is just a fixed-width pulse good enough? No idea what the D-Jet ECU does with the trigger points pulsewidth, if anything.