File:Barcode scanner connected to arduino.JPG - Wikimedia Commons
DIY Arduino 3D Laser Scanner -
Barcode/QR Code Reader using Arduino & QR Scanner Module
Barcode/QR Code Reader using Arduino & QR Scanner Module
Amazon.com : Waveshare Barcode Scanner Module 1D/2D Codes Barcode, QR Code Reader Onboard Micro USB and UART Serial Port Directly Plugged into Computer : Office Products