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  • timers

    We are looking for simple digital timers/stopwatches that
    can be controlled electronically or manually. For example, an
    external electronic circuit with a manual switch or TTL signal should
    be able to stop and start the timer. We would also like to at some point
    be able to hook up photoelectonic switches. These timers will
    be used for reaction time and movement time studies as well as to
    double check some of our timing data we gather from our kinematic
    and kinetic instrumentation.

    The timer needs at least 1 ms precision and readouts. Layfayette
    Instruments has such devices, but they are expensive (about $600USD).
    It seems to me that less expensive devices are available. I am not
    against building a timer, as long as I can get the parts off the shelf
    (e.g. RadioShack) and have easy instructions.

    Anyone have any suggestions?
    Jeff Ives, Ph.D.
    Dept. of Exercise & Sport Sciences Phone: 607-274-1751
    Ithaca College Fax: 607-274-1943
    Ithaca, NY 14850 USA Email:

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