BARCODE SCANNERS - How does it work?

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A barcode reader is also called a price scanner or point of sale (POS) scanner which can be hand-held or stationary input device used to capture and read information contained in a barcode.

A barcode reader consists of a decoder, scanner and a cable used to connect the reader with a computer. Because a barcode reader captures and translates the barcode into numbers or letters, the data is sent to a computer so that a software application can make sense of the data.

Barcode scanners can be connected to a computer through a serial port, keyboard port or an interface device called a wedge . It works by directing a beam of light across the barcode and measuring the amount of light that is reflected back. The scanner converts the light energy into electrical energy, which is then converted into data by the decoder and forwarded to a computer.

An electronic circuit attached to the scanner converts these on-off pulses into binary digits and these digits are sent to the scanner.

Types of barcode scanner:

  • Pen-type Reader
  • Laser Scanner
  • Camera-based Reader
  • CCD Reader
HOW DOES A BARCODE SCANNER WORK?

 When scanning head laser light shines onto the barcode, the sensor will detect the reflected light and generates a analog signal which is send to the decoder.  The decoder will validate the code and convert to text.

Posted by Suave Technologies
Location: Saudi Arabia

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