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@CrazyLee: can't see your pics, infact on your page the only pics I can't see are the mpguino trace ones! Guess you may have moved or be in the process of updating them.
I tried the comparator route, but got nowhere fast, as the gap between the pulses became almost smaller than than the hold portion of the waveform. Thats when I went for the software solution.
I have set my detection pulse to 40uS (aka injector delay parameter), and this seems to work very well. I now need to house my unit, then calibrate it.
If you have access to a scope might be worth trying my software mod, and see what you get.
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