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Discoloration bar code / library Check out System

Discoloration bar code

Regarding the issue where people are easily forgetting to return their books, we added a new feature into the bar code on the books. The bar code uses material that can change color as the time runs, for instance, from light to dark. This will allow users to be reminded about the time limit for returning the books, hence the users can decide whether to renew or return the books. When the bar code scanner scans the bar code, the color of the bar code can be changed to indicate that the previous period ends and a new period is activated. In addition, this design is eco-friendly since the bar code is reusable.