How a barcode actually works🛒
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YouTubeDYK
How a barcode actually works🛒
Every time you go to the store, you see the laser scan the black lines on the barcode, right? Not exactly! Barcode scanners actually read the White Spaces! It’s all based on Optics. The black lines absorb the laser's light, but the white gaps reflect it back into a photoelectric cell. The sensor reads the pattern of the reflected light to ...
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