https://sudonull.com/qr-ticket-validation-design-for-cinemas
Breakdown of System Design for QR Ticket Validation: offline signature, idempotency, atomic updates. Solving timeouts and HoL blocking for high-load. Practical SQL examples.
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In this project
https://sudonull.com/telegram-qr-code-bot-generation-without-ads
Create QR codes in Telegram in seconds: customize color, logo, transparent background. No registration or redirects. Ideal for designers and developers. Try t.me/QRYourLinkBot right now.
https://sudonull.com/nanometer-qr-code-on-ceramics-1-98-μm2
Learn about the record QR code with 49 nm module size, storing 2 TB on A4 for centuries. Chromium nitride technology for energy-free archives. Details for developers.
From the web
QR-код — Википедия
https://ru.wikipedia.org/wiki/QR-%D0%BA%D0%BE%D0%B4
QR- код состоит из чёрных квадратов, расположенных в квадратной сетке на белом фоне, которые могут считываться с помощью устройств обработки изображений, таких как камера, и обрабатываться с использованием кодов Рида — Соломона до тех пор, пока изображение не будет надлежащим образом распознано.
QRCode Monkey — бесплатный генератор QR-кодов для создания ...
https://www.qrcode-monkey.com/ru/
QRCode Monkey также не имеет ограничений. Все созданные QR -коды будут работать вечно, срок их действия не истечет, и они не будут иметь ограничений на сканирование, как это можно заметить у других коммерческих генераторов QR -кодов. Созданные QR -коды статичны, поэтому единственным ограничением является то, что вы не сможете отредактировать QR -код сн...
Генератор QR-кода бесплатно | Создавайте настраиваемые QR ...
https://me-qr.com/ru
Сделайте свои QR- коды особенными с помощью нашей обширной коллекции бесплатных рамок. С более чем 1000 вариантами, включая праздничные и особые темы, вы обязательно найдете идеальное сочетание.
QR Code Generator | Create Your Free QR Codes
https://www.qr-code-generator.com/
QR Code Generator for URL, vCard, and more. Add logo, colors, frames, and download in high print quality. Get your free QR Codes now!
QR code - Wikipedia
https://en.wikipedia.org/wiki/QR_code
QR codes may be used to display text to the user, to open a webpage on the user's device, to add a vCard contact to the user's device, to open a Uniform Resource Identifier (URI), to connect to a wireless network, to compose an email or text message, or as a method of payment.
QR Coder - Генератор QR кодов
http://qrcoder.ru/
Сервис создания QR- кодов on-line. Описание технологии, примеры использования, программы для распознавания.
Все типы QR-кодов
https://qrcode.website/qr
Каталог 22 типов QR- кодов с примерами и инструкциями: ссылки, vCard, Wi-Fi, меню, мини-сайты, СБП-оплата, соцсети, события. Создать QR онлайн бесплатно.
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