Recently [mit41301] wondered about increasing the data capacity of QR codes, and was able to successfully triple the number of bits using color. He chose the new rectangular micro QR code (rMQR) ...

Before you scan that QR code, did you know scammers can swap out QR codes to trick people into handing over their info and stealing their money? Yes, we reported an incident in 2023. Fast-forward to ...

For the longest time we’ve been using UPC bar codes to store strings of information in a compact space on both product labels and people in dystopian sci-fi movies. But as our needs grew and became ...

As you probably know, we love our clocks here at Hackaday. Odd display technologies are always interesting to see, as are unusual encoding techniques such as binary, ternary or higher-radix number ...

QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, phone numbers, or even coupons. QR codes are found everywhere from ...

QR what? Reading this in a recent email from a friend of mine who I have always thought to be super switched on to high-tech and is a Psych. PhD and TV star no less – I thought I’d try and de-mystify ...

QR codes, originally developed as two-dimensional matrix barcodes for rapid data acquisition, have undergone significant transformation and expansion in application. Their evolution from simple ...

On a weekend morning in Hanoi’s Tuong Mai ward, vegetable seller Hoa, a 15-year veteran of the wet market, now closes sales with a single beep.

Chennai: Despite reports of micro merchants forsaking QR-code based digital transactions in some cities, UPI QR PoS terminals more than doubled in the first half of the year, growing from 321.38 ...