Controlling servo motor with accelerometer | MPU6050 with servo

Hello, welcome back. In this tutorial, we will learn how to work the MPU6050 sensor with a servo motor. Also, From this, we can also understand how the values change as the MPU6050 accelerometer sensor moves along one axis. In this tutorial, a servo motor is used to identify it. If you want, you can test this function on other axes as well. Also, the knowledge contained in this tutorial is most important for making drones, prototype aircraft, and self-balancing robots.

The process of this tutorial

When activating this MPU6050 accelerometer sensor via the Arduino board. Through this, the values moving along 6 axes are received by the Arduino board through I2C communication. Next, using only the value of the accelerometer Y-axis from these 6 axes, the same value is converted to the number of degrees that a servo motor rotates. Then, We can see how the servo motor rotates as the sensor moves.

OK, let’s do this project step by step. The required components are given below.

Arduino UNO board x 1 — Amazon / Our Store
MPU6050 sensor x 1 — Amazon / Our Store
Servo motor x 1 — Amazon / Our Store

Jumper wires — Amazon / Our Store

Step 1

Firstly, identify these components.

How to make a line follower robot using Arduino and L298N — Arduino UNO board

Step 2

Secondly, connect these components. To do this, use the circuit diagram below.

Step 3

Thirdly, let’s creates the program for this project. It is as follows.

MPU6050 library — Download
The complete program of this project – Download

/*MPU6050 sensor with servo control.
   https://srituhobby.com
*/

#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include <Servo.h>

Servo servo;
Adafruit_MPU6050 srituhobby;

void setup(void) {
  Serial.begin(115200);
  servo.attach(3);
  Wire.begin();
  srituhobby.begin();
  servo.write(0);

  srituhobby.setAccelerometerRange(MPU6050_RANGE_8_G);//2_G,4_G,8_G,16_G
  srituhobby.setGyroRange(MPU6050_RANGE_500_DEG);//250,500,1000,2000
  srituhobby.setFilterBandwidth(MPU6050_BAND_21_HZ);

  delay(100);
}

void loop() {

  /* Get new sensor events with the readings */
  sensors_event_t a, g, temp;
  srituhobby.getEvent(&a, &g, &temp);

  int value = a.acceleration.y;

  value = map(value,  -10, 10, 180, 0);
  servo.write(value);  
  Serial.println(value);
  //delay(10);

}

Code Explanation

Firstly, the MPU6050 and servo libraries are included.

#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include <Servo.h>

Secondly, objects are created for these libraries.

Servo servo;
Adafruit_MPU6050 srituhobby;

In the setup function,

void setup(void) {

//The serial monitor is begin
  Serial.begin(115200);

// This code sets the servo motor PIN
  servo.attach(3);

//The wire library is begin
  Wire.begin();

//The MPU6050 sensor is begin
  srituhobby.begin();

// Servo motor turns to starting position
  servo.write(0);

//These code lines set the accelerometer and gyroscope ranges
  srituhobby.setAccelerometerRange(MPU6050_RANGE_8_G);//2_G,4_G,8_G,16_G
  srituhobby.setGyroRange(MPU6050_RANGE_500_DEG);//250,500,1000,2000
  srituhobby.setFilterBandwidth(MPU6050_BAND_21_HZ);

  delay(100);
}

In the loop function,

void loop() {

// Get new sensor events with the readings
  sensors_event_t a, g, temp;
  srituhobby.getEvent(&a, &g, &temp);

// Accelerator Y-axis values are put into the variable
  int value = a.acceleration.y;

// This value is converted from 0 to 180
  value = map(value,  -10, 10, 180, 0);

//This code line rotate the servo motor using that value
  servo.write(value);
// That value is printed on the serial monitor
  Serial.println(value);
  //delay(10);

}

Step 4

Lastly, select board and port. Afterward, upload this code to the Arduino board.

OK, enjoy this project. The full video guide is given below. So, we will meet in the next tutorial.