Need some suggestion ignition coil pulse detection

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  1. - 28th April 2009, 01:41 #1
    mistergh's Avatar
    mistergh
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    Smile Interface Ignition Coil to PIC etc

    Here is what you need to do:

    From the low end of the ignition coil to the anode side of a diode 1N4002, then to Resistor 8.2K then to Resistor 3.9K, then to Basis of a NPN Transistor. A capacitor of 68nF between 8.2K and 3.9K Resistor to ground. A Resistor of 3.9k from Collector to +5Volt, Emitter to Ground. Signal from the Collector to your Circuit.

    Code:
    Coil----Diode-----Resistor 8.2K------Resistor 3.9k-------| Base Transistor
                                  |                  |
                                  |                  |
                                 Cap 68nF          Resistor
                                  |                 3.9k
                                  |                  |
                                 Gnd                Gnd
    Hope this helps.
    Last edited by Darrel Taylor; - 28th April 2009 at 01:59. Reason: Added [code] tags
  2. - 28th April 2009, 01:46 #2
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    Default Follow up on Interface...

    My little drawing didn't work too well but you should get the idea...
  3. - 28th April 2009, 02:03 #3
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    Darrel Taylor
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    Default

    vBulletin has some tags that can help with that.

    The ASCII diagrams work best inside of a code block.

    <b>[code]</b>diagram goes here<b>[/code]</b>

    hth,
    DT
  4. - 28th April 2009, 20:38 #4
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    Thumbs up

    Quote Originally Posted by misterg View Post
    Here is what you need to do:

    From the low end of the ignition coil to the anode side of a diode 1N4002, then to Resistor 8.2K then to Resistor 3.9K, then to Basis of a NPN Transistor. A capacitor of 68nF between 8.2K and 3.9K Resistor to ground. A Resistor of 3.9k from Collector to +5Volt, Emitter to Ground. Signal from the Collector to your Circuit.

    Code:
    Coil----Diode-----Resistor 8.2K------Resistor 3.9k-------| Base Transistor
                                  |                  |
                                  |                  |
                                 Cap 68nF          Resistor
                                  |                 3.9k
                                  |                  |
                                 Gnd                Gnd
    Hope this helps.
    Thank's I will probe and post what was as result.
    Robert
    [email protected]

    YU7JN
  5. - 28th April 2009, 20:45 #5
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    Wink Kiss method

    Hi,

    You also can use a small relay ( 1 Amp. Omron G5V i.e. ) , placed along the Ignition Coil;

    just scope what is going out of the coil pins of the relay ...

    oh, surprise ! ... and moreover ... no HV spikes !!!

    Alain
    Last edited by Acetronics2; - 28th April 2009 at 20:47.
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    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
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  6. - 28th April 2009, 23:34 #6
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    Default code box

    Hi Darrel,
    thanks for the tip with the code box, appreciate it.
    Gunther
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