How Does a Barcode Reader Work? Introduction A barcode reader is a simple yet powerful device used to read barcodes. These tools are common in retail stores, warehouses, hospitals, and libraries. They help quickly capture product information and send it to a computer system. What is a Barcode? A barcode is a series of black and white lines of different widths. Each line and gap represent numbers or letters. These codes store information such as price, name, or product ID. Barcode readers scan this information for quick and accurate processing. How a Barcode Reader Works A barcode reader works by shining a light on the barcode. It then captures the light that reflects back. Dark bars reflect less light, while white spaces reflect more. The scanner reads this pattern and converts it into electrical signals. These signals are then turned into digital data and sent to a computer. Main Steps of a Barcode Reader 1. Light is Shown on the Barcode The reader uses a red light or ...