In this section, we will learn to interface SG995 servo motor with Arduino. Interfacing MG995 Servo Motor to Arduino UNO To keep things convenient, specific libraries are written to control and interface the motor instead of setting the PWM values every single time. In this way, we can measure and control our motor to desired degrees. Similarly, a 2.5ms ON-time signal leads to 180-degree axial position. To rotate the motor axis to 90 degrees, the signal should be high for 1.5ms. If the PWM signal is high for 0.5ms in a single cycle, the axis moves to zero degrees. There are some standard calculations for degree rotation. The position of the axis of the motor depends on the duty cycle of the signal. That is why each cycle of the PWM signal is of 20 milliseconds. Any value more or less leads to malfunctioning of the device. The concerned Servo motor can operate only at 50 MHz of frequency. The working principle of this motor is pulse width modulation. The MG995 Servo motor has a signal input pin to rotate the motor. The motor is energized using the power pins that are VCC and GND. Physical Dimensions: 40.7 x 19.7 x 42.9 mm approx.Maximum Load Current Consumption: 1200 mA.Operating Motor Speed 6 V: 0.16 sec/60 degrees.Operating Motor Speed 4.8 V: 0.2 sec/60 degrees. Pulse width modulation input pin that is used to control the axis of rotation of MG995 servo motor Myservo.Reference Potential pin – Connect to the ground of power supply Here is an example code that will make the servo motor rotate from 0 to 180 degrees and back to 0 again: Arduino Code for Interfacing SG90 Servo With Arduino Board #include Once the library has been installed, it’s time to write the code. To install it, open the Arduino IDE, go to Sketch > Include Library > Servo, and select the Servo library. The Arduino Servo library makes it easier to control a servo motor with the Arduino board. Connect the signal pin to a digital pin on the Arduino.Connect the ground pin to one of the GND pins on the Arduino.Connect the power pin to the 5V pin on the Arduino.The servo has three pins: power, ground, and signal. Take the SG90 servo and place it onto the breadboard. Interfacing SG90 servo with ArduinoĬircuit Diagram of Interfacing SG90 servo with Arduino Step 1: Connect the Servo to the Breadboard These are typical specifications for a standard SG90 servo. Note: The specifications listed above may vary slightly based on the manufacturer and specific model of the SG90 servo. Control signal: Pulse width modulation (PWM).Connector wire length: Approximately 300 mm (11.8 inches).Rotation angle: Approximately 180° (can be modified by changing the servo horn).The pulse width must be between 600us and 2400us to rotate the motor from 0° to 180°. A pulse-width modulated signal is applied to this pin, with the width of the pulse determining the position of the motor. Signal (Control): This pin is used to control the position of the servo motor. GND (Ground): This pin is connected to the ground of the circuit. VCC (Power Supply): This pin is connected to the power supply of the circuit, typically 5V. The SG90 servo has three pins that are typically labelled as follows: They are also relatively simple to interface with microcontrollers and are available at a low cost, making them a popular choice for hobbyists and students. One of the key advantages of SG90 servos is their small size and lightweight, making them ideal for small robots and other compact projects. The power pin is connected to a power source (such as a 5V battery), the ground pin is connected to the ground, and the signal pin is connected to a microcontroller (such as an Arduino board) that sends signals to the servo to control its position. SG90 servos have three pins: power, ground, and signal. This type of servo motor can rotate to a specific angle (usually between 0 and 180 degrees) and hold that position with high accuracy. The SG90 servo is a small and affordable micro servo motor that is widely used in various DIY projects and hobby robotics applications.
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