[dorkbotpdx-blabber] counting bicycles

[Brian Richardson]

Utter noise follows:

It seems like you could do this for pretty cheap, a piezo and some PVC:
http://benheck.com/03-01-2009/air-pressure-kick-pedal-for-gh4


On Mon, May 11, 2009 at 2:50 PM, Daniel Johnson <teknotus at gmail.com> wrote:

> I'm involved with the annual bike festival known as pedalpalooza.  For
> some rides so many people show up that it is difficult to count.  Even
> a good approximation is much better than wild guesses.
>
> A while ago I tried to find parts for connecting to air hoses to count
> bicycles by dividing the number of pressure spikes by two.  There are
> so many parts though that I had trouble figuring out what makes sense,
> and I can't estimate price until I know what pressure sensor to use.
> Would like it to report numbers real time so that a screen can count
> up as bikes go through the gate(s).  I imagine other big rides would
> be interested in renting the equipment if it is made durable.
>
> --
> teknotus
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