8 Unique Arduino UNO Projects Using Sensors and Actuators

Arduino UNO is an excellent platform for beginners and enthusiasts to build exciting projects using various sensors and actuators. Here are ten unique projects with codes and pin connections.

1. Smart Dustbin using Ultrasonic Sensor

Components:

• Arduino UNO

• Ultrasonic Sensor (HC-SR04)

• Servo Motor

• Jumper Wires

Connections:

• HC-SR04:

  • VCC -> 5V

  • Trig -> D9

  • Echo -> D10

  • GND -> GND

• Servo Motor:

  • Signal -> D6

  • VCC -> 5V

  • GND -> GND

Code:

2. Automatic Fan using Temperature Sensor

Components:

• Arduino UNO

• DHT11 Temperature Sensor

• Relay Module

• DC Fan

Connections:

• DHT11:

  • VCC -> 5V

  • Data -> D2

  • GND -> GND

• Relay:

  • IN -> D7

  • VCC -> 5V

  • GND -> GND

Code:

3. Obstacle Avoidance Robot

Components:

• Arduino UNO

• Ultrasonic Sensor (HC-SR04)

• Motor Driver (L298N)

• 2 DC Motors

• Battery

Connections:

• HC-SR04:

  • VCC -> 5V

  • Trig -> D9

  • Echo -> D10

  • GND -> GND

• L298N:

  • IN1 -> D5

  • IN2 -> D6

  • IN3 -> D7

  • IN4 -> D8

  • ENA -> D3

  • ENB -> D4

Code:

4. Smart Street Light using LDR

Components:

• Arduino UNO

• LDR Sensor

• Relay Module

• LED Bulb

Connections:

• LDR:

  • One end to 5V

  • Other end to A0 and GND via a 10K resistor

• Relay:

  • IN -> D7

  • VCC -> 5V

  • GND -> GND

Code:

5. Smart Dustbin using Ultrasonic Sensor

Components:

• Arduino UNO

• Ultrasonic Sensor (HC-SR04)

• Servo Motor

• Jumper Wires

Connections:

• HC-SR04:

  • VCC -> 5V

  • Trig -> D9

  • Echo -> D10

  • GND -> GND

• Servo Motor:

  • Signal -> D6

  • VCC -> 5V

  • GND -> GND

Code:

6. Automatic Fan using Temperature Sensor

Components:

• Arduino UNO

• DHT11 Temperature Sensor

• Relay Module

• DC Fan

Connections:

• DHT11:

  • VCC -> 5V

  • Data -> D2

  • GND -> GND

• Relay:

  • IN -> D7

  • VCC -> 5V

  • GND -> GND

Code:

7. Obstacle Avoidance Robot

Components:

• Arduino UNO

• Ultrasonic Sensor (HC-SR04)

• Motor Driver (L298N)

• 2 DC Motors

• Battery

Connections:

• HC-SR04:

  • VCC -> 5V

  • Trig -> D9

  • Echo -> D10

  • GND -> GND

• L298N:

  • IN1 -> D5

  • IN2 -> D6

  • IN3 -> D7

  • IN4 -> D8

  • ENA -> D3

  • ENB -> D4

Code:

8. Smart Street Light using LDR

Components:

• Arduino UNO

• LDR Sensor

• Relay Module

• LED Bulb

Connections:

• LDR:

  • VCC -> 5V

  • GND -> GND

  • A0 -> A0

• Relay:

  • IN -> D7

  • VCC -> 5V

  • GND -> GND

Code:

These projects help beginners explore various Arduino functionalities. Happy Coding!