How do you interface with a barcode scanner or credit card terminal? | Hacker News

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retube on March 20, 2011 | parent | context | favorite | on: Show HN: We made a web-based cash register

How do you interface with a barcode scanner or credit card terminal?

VMG on March 20, 2011 [–]

AFAIK barcode scanners use the keyboard interface, meaning scanning a code just sends some keystrokes to the PC.

chopsueyar on March 20, 2011 | [–]

Sometimes referred to as a "wedge" for a PS/2 keyboard port. USB models can "emulate" a keyboard.

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