> 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?

No practical experience of this, but I'd hazard that it 
would certainly work in some cases and certainly fail in 
others.

Wands which rely on physical movement of the wand wrt the 
target and laser scanners which take the action to the 
stationary target would seem to present somewhat different 
challenges.

A LASER scanner should be able to be tested for operation by 
determining the san rate and then modulating an LED of about 
the right wavelength appropriately. Better still would be a 
device which you could time vary the reflectance of. Then 
instead of grossly time modulating the whole display with 
the pattern you could consider varying it in time sequence 
geographically across the "display" and before you know it 
you have a reflective LCD barcode display :-).


        Russell


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