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  1. 07-08-2010 #11
    irving2008's Avatar
    Lives in NW London, gateway to A1 & M1, United Kingdom.
    irving2008
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    Quote Originally Posted by Ricardoco View Post
    Ok that sounds good but this is uncharted ground for me, the 74hc390 seems like the way to go and i will get a new slotted sensor just to be on the safe side as i dont know if the existing one is ok, you make the circuit sound so simple ill just trust your judgement over mine:confused:

    Rick
    Rick,

    Circuit attached...

    I'm guessing the opto will need to be powered so I have shown likely values (330R/4k7) for the resistors needed to energise the LED and bias the receiver. If you knew what type it was I could give you better values but these should do.
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    Last edited by irving2008; 07-08-2010 at 12:01 PM.
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