QR Code/Barcode Scanner using Arduino & QR scanner module – Circuit Schools
File:Barcode scanner connected to arduino.JPG - Wikimedia Commons
arduino uno - Reading from ps2 barcode scanner - Arduino Stack Exchange
Amazon.com : Barcode Scanner Module, 1D/2D Codes Reader Decode Barcode, QR Code etc Onboard Micro USB and UART Interface Plug into a Computer Directly or Other Device Onboard Light Source can Work