So I am creating a project for school on obstacles avoiding car. So I followed a video and created a car exactly as shown in the video and when I uploaded the code the servo motor started moving. But when I removed the cable and turn on the battery only the "on" light is turned one and there is no response.
This is my uno
This is the circuit diagram.
And this is the code
#include <Servo.h>
#include <NewPing.h>
#define SERVO_PIN 3
#define ULTRASONIC_SENSOR_TRIG 11
#define ULTRASONIC_SENSOR_ECHO 12
#define MAX_REGULAR_MOTOR_SPEED 75
#define MAX_MOTOR_ADJUST_SPEED 150
#define DISTANCE_TO_CHECK 30
//Right motor
int enableRightMotor=5;
int rightMotorPin1=7;
int rightMotorPin2=8;
//Left motor
int enableLeftMotor=6;
int leftMotorPin1=9;
int leftMotorPin2=10;
NewPing mySensor(ULTRASONIC_SENSOR_TRIG, ULTRASONIC_SENSOR_ECHO, 400);
Servo myServo;
void setup()
{
// put your setup code here, to run once:
pinMode(enableRightMotor,OUTPUT);
pinMode(rightMotorPin1,OUTPUT);
pinMode(rightMotorPin2,OUTPUT);
pinMode(enableLeftMotor,OUTPUT);
pinMode(leftMotorPin1,OUTPUT);
pinMode(leftMotorPin2,OUTPUT);
myServo.attach(SERVO_PIN);
myServo.write(90);
rotateMotor(0,0);
}
void loop()
{
int distance = mySensor.ping_cm();
//If distance is within 30 cm then adjust motor direction as below
if (distance > 0 && distance < DISTANCE_TO_CHECK)
{
//Stop motors
rotateMotor(0, 0);
delay(500);
//Reverse motors
rotateMotor(-MAX_MOTOR_ADJUST_SPEED, -MAX_MOTOR_ADJUST_SPEED);
delay(200);
//Stop motors
rotateMotor(0, 0);
delay(500);
//Rotate servo to left
myServo.write(180);
delay(500);
//Read left side distance using ultrasonic sensor
int distanceLeft = mySensor.ping_cm();
//Rotate servo to right
myServo.write(0);
delay(500);
//Read right side distance using ultrasonic sensor
int distanceRight = mySensor.ping_cm();
//Bring servo to center
myServo.write(90);
delay(500);
if (distanceLeft == 0 )
{
rotateMotor(MAX_MOTOR_ADJUST_SPEED, -MAX_MOTOR_ADJUST_SPEED);
delay(200);
}
else if (distanceRight == 0 )
{
rotateMotor(-MAX_MOTOR_ADJUST_SPEED, MAX_MOTOR_ADJUST_SPEED);
delay(200);
}
else if (distanceLeft >= distanceRight)
{
rotateMotor(MAX_MOTOR_ADJUST_SPEED, -MAX_MOTOR_ADJUST_SPEED);
delay(200);
}
else
{
rotateMotor(-MAX_MOTOR_ADJUST_SPEED, MAX_MOTOR_ADJUST_SPEED);
delay(200);
}
rotateMotor(0, 0);
delay(200);
}
else
{
rotateMotor(MAX_REGULAR_MOTOR_SPEED, MAX_REGULAR_MOTOR_SPEED);
}
}
void rotateMotor(int rightMotorSpeed, int leftMotorSpeed)
{
if (rightMotorSpeed < 0)
{
digitalWrite(rightMotorPin1,LOW);
digitalWrite(rightMotorPin2,HIGH);
}
else if (rightMotorSpeed >= 0)
{
digitalWrite(rightMotorPin1,HIGH);
digitalWrite(rightMotorPin2,LOW);
}
if (leftMotorSpeed < 0)
{
digitalWrite(leftMotorPin1,LOW);
digitalWrite(leftMotorPin2,HIGH);
}
else if (leftMotorSpeed >= 0)
{
digitalWrite(leftMotorPin1,HIGH);
digitalWrite(leftMotorPin2,LOW);
}
analogWrite(enableRightMotor, abs(rightMotorSpeed));
analogWrite(enableLeftMotor, abs(leftMotorSpeed));
}