A servo motor moves to a commanded angle using internal feedback. Micro servos are light and small; high-torque servos are stronger for arms, steering, and walking robots.
Concept illustration. Check the component datasheet before wiring.
Try it yourself
Change an input. See what follows.
A simplified learning model. Values describe the model, not a connected robot.
Working Principle
A servo motor moves to a commanded angle using internal feedback. Micro servos are light and small; high-torque servos are stronger for arms, steering, and walking robots.
Step by Step
Controller sends a pulse signal.
Servo electronics compare target and current angle.
Motor turns until the target angle is reached.
Gearbox holds position with torque.
Concept illustration; component appearance and scale are simplified.
Practical learning notes
Key idea
A hobby servo reads pulse width. Around 1 ms is one side, 1.5 ms is center, and 2 ms is the other side on many servos.
Use in robot
Micro servo can rotate the ultrasonic sensor for scanning. High-torque servos move heavier arms or joints.
Safe wiring
Power the servo from a stable 5V supply with common ground. Do not rely on the Nano 5V pin for high servo load.
Classroom check
Sweep 30, 90, and 150 degrees and watch for jitter caused by weak power.
Explore real robotics applications, from mobile robots to inspection and joint motion. Define a measurable target and test one change at a time.
Servo supply and travel
Use the exact servo’s rated supply voltage and a supply sized for peak current, with common signal ground. The 5 V example is not universal. Calibrate travel limits; a continuous-rotation servo uses a different speed-control interpretation.
Good ideas start here.
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