A barcode reader, also called a price scanner or point-of-sale ( POS ) scanner, is a hand-held or stationary input device used to capture and read information contained in a bar code .
How do barcode readers work?
All barcode readers use a light source and sensors to detect and measure the intensity of light reflected back by the white spaces within the unique pattern of parallel bars. The reflected light is detected through a photodiode, producing an electronic signal that corresponds to the barcode pattern.
How does computer use barcode?
THE BARCODE SCANNER
The decoder interprets that signal, validates the barcode using the check digit, and converts it into text. This converted text is delivered by the scanner to a computer software system holding a database of the maker, cost, and quantity of all products sold.
How is a barcode reader an input device?
A Barcode reader or Barcode scanner is an electronic input device which is able to scan and decode barcodes. These devices use optical technology such as infrared light. Some readers use an integrated decoder, others have one unit for reading the barcode, and another one to decode the barcode.
Is barcode reader an output device?
Like other input devices, a barcode reader is bringing in (inputting) information from the outside world into a computer or other electronic device. If the barcode reader also has a screen that displays (outputs) results or prints results, it would be considered an input/output device.
What does barcode stand for?
A bar code (often seen as a single word, barcode) is the small image of lines (bars) and spaces that is affixed to retail store items, identification cards, and postal mail to identify a particular product number, person, or location.
Can a barcode reader read any barcode?
Not all barcode scanners can read all barcodes. Laser barcode scanners and linear imagers read only 1D barcode scanners. Imager (camera-based) 2D barcode scanners read all common 1D and 2D barcodes.
What are the advantages of using a barcode reader?
Advantages of Barcode Reader
Universal. Barcodes are universally accepted technology. Accuracy. Human errors can cause problems in every face of the business. Productivity. The ability to track data fast and accurate can lead to better decision making in each department. Time Savings. Employee Training. Inventory Control.
What is product barcode?
A barcode, consisting of bars and spaces, is a machine-readable representation of numerals and characters. Today, stripes as shown below on packages of products sold at supermarkets, convenience stores and other stores are ubiquitous. These are barcodes.
What is the function of barcode?
Barcodes are applied to products as a means of quick identification. They are used in retail stores as part of the purchase process, in warehouses to track inventory, and on invoices to assist in accounting, among many other uses.
How does a barcode reader work GCSE?
A barcode reader works in a very similar way to a 2D scanner. It uses reflected light from a laser to detect the black lines in a barcode or QR code. All barcodes use a check-digit so that the system knows when a barcode has been scanned correctly.
