Month: March 2014

  • Improbable Contest?

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    by

    EvaB
    in

    Aim:  To bear the most weight. Method:   Make a table, at least two inches high, out of a page from a telephone book and 11 3/4 inches of masking tape. Reward:  A three month membership to the Diyode Community Workshop, here at 71 Wyndham St S., Unit B, where do-it-yourselfers make all sorts of…

  • Counting RPM with an arduino

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    by

    Simon Clark
    in

    For the latest IgniteGuelph contest, we needed a way to measure the speed of homebuilt electric motors. Simple RPM, not torque was the goal, so we opted to go with a light sensor on an arduino to count the light/dark cycles. First, we need to figure out the threshold value of the light sensor.  We…