The most common Bar Code Device is often called barcode reader or barcode scanner. It is an electronic device for reading barcodes. A common barcode reader consists of a light source to reach out/illuminate bracodes, a light sensor to collect optical signals and convert them into electrical ones, and a decoding circuitry (decoder) to analyze the received signals and translate them to ASCII code data. The data then send through the scanner's output port.
Most popular barcode readers include Pen-type readers, Laser scanners, CCD (Charge-coupled device) readers, Camera-based readers, Cell phone cameras. The housing and packaging of common barcode readers include Handheld scanner, Pen scanner (or wand scanner), Stationary scanner, Fixed-position scanner, Smart Phone/PDA scanner, Automatic reader, and Cordless scanner. The methods of connection includ Early serial interfaces (e.g., RS232), Proprietary interfaces (POS, Point of Sale), Keyboard wedges (e.g., PS/2), USB (Universal Serial Bus), Wireless networking (WIFI IEEE 802.11g; Blurtooth IEEE 802.15.3).
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