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William Foster——Works at Microsoft, Lives in Seattle. Graduated from University of Washington with a degree in Computer Engineering.
Scanning head shines LED or laser light onto barcode. Light reflects back off barcode into a light-detecting electronic component called a photoelectric cell. ... As the scanner moves past the barcode, the cell generates a pattern of on-off pulses that correspond to the black and white stripes.read more >>+119962023-04-28 19:28:01
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