⚙️ SG90 Servo Motor (180°)

📌 Description

The SG90 servo motor is a small, lightweight motor that can rotate to a specific angle between 0° and 180°. Unlike regular motors that spin continuously, a servo motor moves to precise positions, making it ideal for robotics and control systems.

🎯 Use

In our projects, the SG90 servo is used to:

Move robot arms or joints.
Control steering mechanisms.
Create precise movements like opening/closing doors or pointing sensors.

👉 Think of the servo as the robot’s muscle — it moves exactly where you tell it to.

Module parameters

Pin name	Description
Brown line	GND (Power Input Negative)
Red line	VCC (Power Input Cathode)
Orange line	Control signal pins

Supply voltage: 4.8V to 6V DC
Standby Current: 5mA
Limit Angle: 210°±5%
Torque: 1.3 to 1.7kg/cm
Operating temperature: -10°C to 60°C
Humidity range: 60%±10%
Rotational speed: 0.09 to 0.10 sec/60° (4.8V)
Signal period: 20 ms
Signal High Level Time Range: 1000 to 2000 us/cycle

🖥️ Code Explanation

import servo
import time

while True:
    servo.servo180_angle(25, 0)     # Move to 0°
    time.sleep(0.5)                 # Wait 0.5 seconds
    servo.servo180_angle(25, 90)    # Move to 90°
    time.sleep(0.5)                 # Wait 0.5 seconds
    servo.servo180_angle(25, 180)   # Move to 180°
    time.sleep(0.5)                 # Wait 0.5 seconds
    servo.servo180_angle(25, 90)    # Return to 90°
    time.sleep(0.5)                 # Wait 0.5 seconds

Step by Step

import servo, time → Tools for controlling the servo and adding pauses.
servo.servo180_angle(25, 0) → Moves the servo on pin 25 to 0°.
time.sleep(0.5) → Waits half a second.
servo.servo180_angle(25, 90) → Moves the servo to 90° (middle position).
servo.servo180_angle(25, 180) → Moves the servo to 180° (maximum position).
Loop repeats → The servo cycles through 0°, 90°, 180°, and back to 90°.

👉 Together, this program makes the servo sweep through its range of motion continuously.

✅ Conclusion of the Test

If the servo moves smoothly between 0°, 90°, and 180°, the program is working correctly.
This test shows how the robot can control precise angles with a servo motor.
Later, the servo could be used for robot arms, steering systems, or sensor positioning.