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Project Information

The Arduino Beginner's Project: Servo is an ideal starting point for anyone interested in the basics of mechatronics and mechanical motion. It provides the foundation for using one of the most common motors in robotics: the Servo Motor.

Why Servos?

Unlike DC motors, which spin continuously until power is removed, a Servo (like the SG90) allows you to set a precise angle between 0 and 180 degrees. This makes it perfect for tasks like steering a car, moving a robot arm, or controlling the orientation of a sensor.

Hardware Circuit

• Power (VCC): Red wire connected to Arduino's 5V pin.
• Ground (GND): Brown/Black wire connected to Arduino's Ground (GND) pin.
• Signal: Orange/Yellow wire connected to a PWM pin (usually Pin 9).

Essential Code

The Arduino's built-in Servo.h library makes this project very simple. Here's a quick look at how the code functions:

1. Include the library: #include <Servo.h>
2. Create the servo object: Servo myServo;
3. Link to the pin: myServo.attach(9);
4. Command the angle: myServo.write(180);

Important Tips

• Calibration: Always start your code by resetting the servo to its 90-degree position before attaching any mechanical parts to the motor's horn.
• Power Requirements: While one small SG90 servo can be powered directly from the Arduino, larger or multiple servos will require an external power supply to prevent the Arduino from resetting or being damaged by high current draw.

Exploration

Try building on this project by adding a potentiometer (analog dial) to make the servo mimic your movement, or an ultrasonic sensor to make a simple radar system.