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Re: My latest cool DIY automation idea



"E. Lee Dickinson" <lee@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:e8n3jp$bu7$1@xxxxxxxxxxxxxxxxxxxx
>
> Finally figured it out, and it was so elegant.  Every entry and exit to
> the parking garage has two IR beams, spaced six inches from eachother.
> Whichever beam is broken first indicated the directon of travel. Car goin
> in, add one. Car going out, subtract one.
>
> Same would work in a door jamb, put it about 3 feet up so it misses pets,
> but detects (many) children, and doesn't count adult legs as two people.

Now that is cool.




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