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timing system

Discussion in 'Electronic Repair' started by complementorylex, Oct 15, 2005.

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  1. cnctut

    cnctut Guest

    An old Apple computer with the 6502CPU works well for this application.
    This computer has several 1 bit input ports that are addressed and can
    be checked with a simple assembly language program. Bit location 1
    on--start counter. Bit location 2 off--stop counter. Photo diodes or
    Csd(?) will work for on/off bit switches--or of course you could use
    simple wires or actual switches.

    Good luck.
     
  2. ok but im having diffuclty in finding a an apple comp like that. doe
    anyone have any other ideas?
    i know this is probably completely incorrect but i was thinking gettin
    a USB connector and finding the red and the black wire and connectin
    that to the infra red gate. (que laughter)
    basically i want create a timing system like i imagine they would hav
    for something like the 100 metres where breaking the first gate start
    the timer and breaking the second gate stops it.
    Many thanks
     
  3. Stan

    Stan Guest

    }basically i want create a timing system like i imagine they would have
    }for something like the 100 metres where breaking the first gate starts
    }the timer and breaking the second gate stops it.

    Use an older Mac with modem & printer ports...first IR triggers
    through modem port, 2nd thru printer port, assuming a Mac serial port
    can communicate up to 100 meters from the PC. Programming the Mac
    ought to be not difficult, assuming you can program.

    Stan.
     
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