| Project | New Skill | Component | | :--- | :--- | :--- | | 1. SOS Signaler | pinMode() , digitalWrite() , delay() | LED | | 2. Traffic Light | Sequence timing, Code organization | 3x LEDs | | 3. Interactive Button | digitalRead() , Pull-up/down resistors | Push button | | 4. Serial Monitor | Serial.begin() , Debugging, Baud rate | USB Cable | | 5. Fading Nightlight | analogWrite() , PWM pins (~ symbol) | Potentiometer, LED | | 6. Light Theremin | analogRead() , Sensor mapping | Photoresistor, Speaker | | 7. Servo Sweeper | #include <Servo.h> , Libraries | Servo motor | | 8. Distance Detector | PulseIn, Timing non-blocking code | Ultrasonic sensor (HC-SR04) | | 9. Temperature Logger | Floating point math ( float ) | DHT11 sensor | | 10. Combination Lock | if/else , == operator, State change | Keypad or Button matrix | For every code block, a side-by-side translation :