COMPUTER FUNDAMENTALS

Detailed explanation-1: -More specifically, the sensor in the barcode scanner detects the reflected light from the illumination system (the red light) and generates an analog signal that is sent to the decoder. The decoder interprets that signal, validates the barcode using the check digit, and converts it into text.

Detailed explanation-2: -This method uses a semiconductor device called CCD(Charge Coupled Device), which converts light signals into electric signals. The CCD method bar code scanner has a built-in light. A scanner shines this light at a bar code and its reflection is captured via CCD for reading.

Detailed explanation-3: -Barcode readers capture and translate barcodes into numbers and/or letters for translation by computer. Barcode scanners can be connected to a computer through a serial port, keyboard port or interface device called a wedge.

Detailed explanation-4: -The purpose of a barcode scanner is to scan or read a barcode symbol and then provide an electrical output to a computer via a decoder and cable. The decoder recognizes the type of barcode symbology it is seeing, translates the bar and space content and transmits data to a computer in a human readable format.