Here’s a basic overview of how you can create a simple smart key system: Components Needed Arduino Board (e.g., Arduino Uno, Nano) RFID Reader (e.g., MFRC522) RFID Tags/Cards Servo Motor (for locking mechanism) Breadboard and Jumper Wires Resistor (if required for the RFID module) Power Supply (for the Arduino) Steps to Create a Smart Key 1. Wiring the Components Connect the RFID reader to the Arduino: SDA to Digital Pin 10 SCK to Digital Pin 13 MOSI to Digital Pin 11 MISO to Digital Pin 12 IRQ (not connected) GND to Ground RST to Digital Pin 9 VCC to 3.3V Connect the servo motor: Signal pin to a PWM-capable pin (e.g., Digital Pin 6) Power and ground to the appropriate rails. 2. Install Required Libraries Install the MFRC522 library for the RFID reader via the Arduino Library Manager. Install the Servo library (usually included with the Arduino IDE). 3. Programming the Arduino Here’s a simple code snippet to get you started: cpp # in...