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Electronics Timer - Pinewood Derby

Discussion in 'Modding' started by HowY, 28 Feb 2008.

  1. HowY

    HowY What's a Dremel?

    14 Feb 2005
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    Hey Guys...

    The smell of pinewood is in the air - so it must be derby time! :dremel:

    So may I ask the collective if anyone has home-built a timer circuit
    for the pinewood derby (4 lanes) - our track is just a winner LED signal.

    I'd like to provide a digital readout for each lane of elapsed time and win lane LED
    (a micro-switch at the start gate will drop ground to start the sequence)

    I know I've seen a few posts on the matter and hope there might be some
    decent homebrew designs for a trap (light sensor) and a means of interfacing
    a timer for each lane....

    Free standing - as in no PC interfacing just a "start" signal and a "Stop"
    from like an NPN phototransistor or such that somehow works into a
    small 4 or 6 character display?

    Any Ideas?

    Thanks in Advance!
  2. Tec_

    Tec_ What's a Dremel?

    26 Feb 2008
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    it might be a lot more than your willing to spend, but you could look at getting a PLC. i would suggest a siemens logo or a similar model(there cheaper but the logo has free software and is very beginner friendly).wit some simple sensors, wiring, and a little graphic programing you could easily accomplish what you are looking for.
  3. Upriverpaddler

    Upriverpaddler What's a Dremel?

    29 Jan 2005
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