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 ...

In just 100 seconds, learn how Arduino works - from its microcontroller and architecture to how it's programmed and used in real-world projects. A fast, simple intro to one of the most powerful tools ...