That's too convenient, cameras can read many qr codes at a time. Encode the binary on some punch cards.

Pretty sure cameras can be used to read punchcards too.

	▲	alex_suzuki 6 minutes ago \| parent [-]
		This sounds like a fun project. Somebody already did it, apparently: https://hackaday.com/2012/07/30/reading-punch-cards-with-an-...