Raspberry Pi

80 min

A servo motor is just a simple DC motor with certain modifications. When you look at it, you’ll notice that it has several gears and an electronic circuit. These improvements provide the motor with new capabilities, such as precise control of the shaft’s speed and direction.

Project Video

Overview

In this tutorial, we will use the Raspberry pi 5 to control the servo motor shaft to sweep back and forth across 180 degrees.

Getting the Items

Raspberry Pi 5 Single Board Computer

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SG90 Servo -Positional Rotation

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Jumper Wires – Male to Female (40 Pack)

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Steps

Wiring it Up

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Connections from the servo motor:

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• Servo GND pin→ Raspberry pi 5 GPIO GND pin

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• Servo VCC pin→ Raspberry pi 5 GPIO 5V pin

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• Servo signal pin → Raspberry pi 5 GPIO pin 18

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Coding

Now on your Raspberry Pi, click on the menu, then choose programming, then open the Thonny ide program.

Now copy that code into it, The function of this code is to control the servo motor shaft to sweep back and forth across 180 degrees.

Each type of servo motor has a specific duty cycle, which you will find in the datasheet of your servo and which must be set in the programming code. Therefore, be sure to change the duty cycle through the variables (min_pulse_width, max_pulse_width) in the programming code to be compatible with the datasheet.

Download Copy Code

from gpiozero import AngularServo

from time import sleep

# Create an AngularServo object with the specified GPIO pin,

# minimum pulse width, and maximum pulse width

servo = AngularServo(18, min_pulse_width=0.0006, max_pulse_width=0.0023)

try:

while True:

# Set the servo angle to 90 degrees

servo.angle = 90

sleep(1) # Delay for 1 second

# Set the servo angle to 0 degrees