How to Control a Servo with an Ultrasonic Sensor and Arduino + Code

Published at : 23 Dec 2025

Ready to make your Arduino projects interactive? Join me as I show you how to control a servo motor using an ultrasonic sensor and Arduino. We'll wire all the components together, dive into the code with line-by-line explanations, and explore two fun examples: a servo snapping to attention where the servo rotates to a specific angle when an object is detected at a specific distance and a dynamic setup where the servo rotates smoothly from 0° to 180° based on how close or far the object is.

Whether you're building props, a robotic arm, displays, or just want to add some interactivity to your Arduino projects and props, this Arduino tutorial is packed with possibilities!

🔗 Full Tutorial & Code: http://racheldebarros.com/how-to-control-a-servo-with-an-ultrasonic-sensor-and-arduino/

▶️ Get Started with Ultrasonic Sensors and Arduino: https://www.youtube.com/watch?v=ZqQgxgnH9wg


🤖 WANT MORE Arduino projects with wiring diagrams and code? NEED GUIDANCE with your project? ▶︎ JOIN my Discord Community
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Prefer to join through Patreon instead? I'm on there too! (same membership perks)
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🛒 BUILD YOUR OWN Servo and Ultrasonic Sensor with Arduino Project:
Arduino Uno: https://amzn.to/3Ylh2fg
HC-SR04 Ultrasonic Sensor: https://amzn.to/4fhJJAy
Micro Servo: https://amzn.to/4eNKq44
Breadboard: https://amzn.to/3AaO3CR
Jumper Wires: https://amzn.to/4e5CLNU
4 AA Battery Holder: https://amzn.to/4g762Jz

🎬 VIDEO CHAPTERS: Control a Servo with an Ultrasonic Sensor and Arduino
0:00 Welcome
0:29 How an Ultrasonic Sensor Works
1:59 How to Calculate Distance with an Ultrasonic Sensor
2:31 Ultrasonic Sensor Pinout
2:38 How to Wire an Ultrasonic Sensor to an Arduino Uno
4:17 How to Wire a Servo to an Arduino Uno
5:02 How to Power a Servo with External Power Source
6:19 How to Power an Ultrasonic Sensor with Arduino Uno
7:05 Arduino Code: Rotate Servo at Specific Distance with Ultrasonic Sensor
16:46 Arduino Code: Rotate Servo Continuously Based on Distance with Ultrasonic Sensor
21:12 Get the Arduino Code
21:25 Join my Community for Live Events & More Code!

💬 Have any questions or want to share your own experiences, tips and advice about using an ultrasonic sensor with Arduino to control a servo? Drop a comment below – I love hearing from you!

🔔 If you find this video helpful, please hit that like button 👍 and consider subscribing to my channel for more Arduino/props/robot tutorials, tips, and tricks. Your support helps me create more content like this!

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Some links here (Amazon) might earn me enough nuts and bolts (aka commission) to keep the LEDs blinking and servos turning. No extra cost to you, just a lil' fuel for my caffeine-powered nights of DIY-ing and passing on what I learn to all of you. I only feature stuff that's survived my "Did-it-Explode?" test. Build on, and thanks for the recharge!

#arduino #ultrasonicsensor #servo #servomotor #arduinocode #arduinoproject #arduinotutorial #arduinoprogramming