XDA Developers on MSN
Someone made a literal credit card-sized ESP32 computer, and so can you
Finding a use-case for it can come later.
Brex reports that smart cards, used in various sectors, feature embedded chips for secure transactions and spend management, ...
Tom's Hardware on MSN
Tiny credit card computer includes eInk screen and is just 1mm thick
Prototype plans are on GitHub where the maker encourages experimentation, modification, and non-commercial use.
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