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Old 10-05-2011, 06:44 PM   #129 (permalink)
CrazyLee
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Comparitor signals.

Quote:
Originally Posted by dcb View Post
the comparitor is not picking up the hold portion of the injector signal.

so you can't fiddle with that potentiometer and get a longer low pulse out of the comparitor? Have you looked at the opto-isolator version?
I'll check it out. The comparitor picks up all of the positive portion of the injector pulse. I need to bias the signal so it only sees the middle to the top. Then it will see only the pulse width.


I am adding a variable resistor to a B- to Injector in and a blocking capacitor to the ECU input signal to lower the signal B-. I may have more to do.

I hope to lower the signal so the bias is set lower than -5 to -15 volts so all the comparator will see the actual pulse width.

I need a - 15 volt source. I am trying a - volt pump from the actual injector pulse! I'll keep you posted.

Last edited by CrazyLee; 10-05-2011 at 09:28 PM.. Reason: new ideas
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