Plug the RFID module into the breadboard with enough space around it. Connect the VCC pin to the Arduino's 3.3V (not 5V), and GND to the ground rail. For the data connections, wire SDA to Pin 10, SCK ...

[Tommy] has a great write-up about designing and building a minimalistic handheld electronic game called “Higher Lower”. It’s an audio-driven game in which the unit plays two tones and asks ...

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Arduino # NFC hardware code with Arduino + RC522 module /backend # Backend APIs for OTP and NFC verification /frontend # React frontend app for wallet & transaction UI /contract # Solidity smart ...