[TriEmbed] TriEmbed Digest, Vol 39, Issue 16

[Chip McClelland]

Alex, yes, bought and tested that one. But humans are not reflective sir
only about 12'. Cars to 30' easy so will eventually use it to replace the
pneumatic tubes across the road.

Bought a matched pair of IR emitter and phototransistor yesterday. Will see
if I can build my own circuit as this seems to be a new and novel
application (!?).

Thanks, chip

On Tuesday, August 23, 2016, <triembed-request at triembed.org> wrote:

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>    1. Re: TriEmbed Digest, Vol 39, Issue 15 (Alex Davis)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Mon, 22 Aug 2016 13:28:21 -0400
> From: Alex Davis <alexd at matrixwide.com <javascript:;>>
> To: triembed at triembed.org <javascript:;>
> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 15
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>         <1471886901.1337427.702662641.4268E605 at webmail.messagingengine.com
> <javascript:;>>
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>
> > All,  any ideas on a low power (5mA and 3.3-5V) IR beam sensor
> > (transmitter
> > and reflector) I could use in an outdoor setting?  Need to count
> > pedestrians walking on a gravel road and the width - 30' - is too great
> > for
> > ultrasonic. Ideally, could buy the sensor components directly and
> > integrate
> > them with my data logger board.
>
> Chip,
>
> looks like this one (https://www.sparkfun.com/products/11724) can be had
> in a 10-meter version, and uses 2.9 mA average, so maybe ultrasonic
> would work.
>
> I think decent-range beam-break is going to take some decent current.
>
> Alex
>
> --
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> End of TriEmbed Digest, Vol 39, Issue 16
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-- 
Sent from my iPhone - please excuse the typos
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