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control-a-servo-with-a-potentiometer-c13c16-en.md

Physical Movement: Knob-Controlled Servos

The Potentiometer-Controlled Servo is one of the most satisfying beginner projects. It creates a direct physical link between your hand’s movement and the motor’s response, making it the perfect foundation for camera gimbals and robotic steering.

servo_motor_button_control_circuit_1772706810871.png

How It Works: Pulse Width Modulation

  1. The Dial: You turn the 10k potentiometer. The Arduino reads a value from 0 to 1023.
  2. The Translation: The code uses the map() function to convert that 0-1023 value into an angle from 0 to 180 degrees.
  3. The Pulse: The Arduino sends a specific electrical pulse (PWM) to the servo.
  4. The Movement: The internal electronics of the servo interpret that pulse and move the motor shaft to the exact angle corresponding to your knob's position.

Hardware Components

  • Arduino Uno/Nano: The PWM signal generator.
  • SG90 Micro Servo: The output device.
  • 10k-ohm Potentiometer: The analog input device.
  • Breadboard and Jumper Wires.

ultrasonic_servo_mount_detail_1772682020744.png

Why This Project?

This setup is the core of Master-Slave systems used in industrial robotics and surgical arms. By mastering the coordination between an analog input and a servo output, you're ready to build more complex joints for humanoid robots or pan-tilt mounts for tracking cameras.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Control a Servo with a Potentiometer"
description: "Precision in your hands! Learn how to use a rotary knob (potentiometer) to control the exact angle of a servo motor in real-time."
category: "Motors & Robotics"
difficulty: "Easy"