So I am trying to use a ultrasonic sensor to control my small simple dc motor, I am using this code that i found online.. However, when I directly connect my dc positive to pin 3, it does not work.. I know that the ultrasonic and the dc motor works individually and ultrasonic sensor works in this circuit but the motor does not turn.. what is the problem? would really appreciate some answers..
const int trigPin = 6;
const int echoPin = 5;
// defines pins numbers motors.
const int motor = 3;
// defines variables
long duration;
int distance;
void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
pinMode(motor, OUTPUT); // Sets the Motor as an Output
Serial.begin(9600); // Starts the serial communication
}
void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance= duration*0.034/2;
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
if(distance < 10){
digitalWrite(motor, HIGH);
}else{
digitalWrite(motor, LOW);
}
}