The only thing that hasn't been mentioned is that a lot of visible
light scanners modulate the laser or lighting element to seperate
signal and noise, such as from flourescent lights, etc.

So even if you had the simplest barcode scanner (a wand you swiped
across the barcode) if it was modultated you'd be unable to sense and
respond appropriately with a transmit only scenario.

-Adam

On 1/28/08, James Newton <jamesnewton@massmind.org> wrote:
> I'm still really interested to hear from anyone who does barcode readers:
> Can an LED be used to generate a pattern of light and dark that a barcode
> wand would see as if it were a barcode?
>
>
> --
> James.
>
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