Project 2.9.2: Moving Gate Warning Light

Description	This project uses an LED that flashes only while the servo motor is actively sweeping, providing visual indication of gate movement.
Use case	This project can be used in automation systems, interactive installations, and embedded control applications.

Components (Things You will need)

Building the circuit

Things Needed:

• Arduino Uno = 1
• Arduino USB cable = 1
• LED = 1
• Servo motor = 1
• Breadboard = 1
• Jumper wires
• 220Ω resistor

Mounting the component on the breadboard

Step 1: Place the LED and the Resistor on the breadboard.

NB: Make sure all components are securely placed on the breadboard with correct orientation.

WIRING THE CIRCUIT

Step 2: Connect the anode (long leg) of the LED to one end of a 220 Ω resistor. Connect the other end of the resistor to Digital Pin 7 on the Arduino using male-to-male jumper wire.

Step 3: Connect the cathode (short leg) of the LED to the GND pin on the Arduino using male-to-male jumper wire.

Step 4: Connect the Signal (Orange/Yellow) wire of the Servo Motor to Digital Pin 9 on the Arduino using male-to-male jumper wire.

Step 5: Connect the VCC (Red) wire of the Servo Motor to 5V on the Arduino using male-to-male jumper wire.

Step 6: Connect the GND (Brown/Black) wire of the Servo Motor to GND on the Arduino using male-to-male jumper wire.

Make sure to connect the Arduino USB cable to the Arduino board.

PROGRAMMING

Step 1: Open your Arduino IDE. See how to set up here: Getting Started.

Step 2: Type the following code in your Arduino IDE: const int servoPin = 9;, const int ledPin = 7;, Servo gateServo; as shown in the image below.

Step 3: Type the following code in your Arduino IDE inside the setup() function: gateServo.attach(servoPin);, pinMode(ledPin, OUTPUT);, gateServo.write(0); as shown in the image below.

Step 4: Type the following code in your Arduino IDE inside the loop() function: for (int angle = 0; angle <= 180; angle++) {, gateServo.write(angle);, digitalWrite(ledPin, HIGH);, delay(10);, digitalWrite(ledPin, LOW);, delay(10); } as shown in the image below.

Step 5: Type the following code in your Arduino IDE inside the loop() function: digitalWrite(ledPin, LOW);, delay(1000);, for (int angle = 180; angle >= 0; angle--) {, gateServo.write(angle);, digitalWrite(ledPin, HIGH);, delay(10); }, digitalWrite(ledPin, LOW);, delay(10); }, digitalWrite(ledPin, LOW);, delay(1000); as shown in the image below.

Uploading the code

Step 1: Save your code. See the Getting Started section

Step 2: Select the Arduino board and port. See the Getting Started section

Step 3: Upload your code.

CONCLUSION

This project helps learners understand how to combine multiple components with Arduino to create more complex interactive systems and automation solutions.