Make a Distance Meter

In this instructable, I have shown How to make Distance meter with Ultrasonic Sensor and Arduino nano.

1. Plastic Box

2. Arduino Nano

3. Ultrasonic Sensor (HC-SR04)

4. Servo Motor

5. Vero Board

6. Battery

7. Switch

8. Header Pins

9. Wire

Make the circuit board as per this circuit diagram.

Download the code from the link

#define echoPin 6
#define trigPin 7

#include Servo myservo;

void setup()

{

Serial.begin(9600);

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

myservo.attach(9);

myservo.write(180);

}

void loop()

{

float distance, duration;

digitalWrite(trigPin , HIGH);

delayMicroseconds(100);

digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance= (((duration/2)/29.1/100)*39.37);

int angle = map( distance, 0,12,180,0);

myservo.write(angle);

/*Serial.print("Distance is"); /////////////////////////////////////////////////////

Serial.print(distance); //////Use this section to check///////

Serial.println("in"); //////every thing is ok//////////////////////

Serial.flush(); ///////////////////////////////////////////////////////

delay(1000);*/

}

Cut all the extra edges of your plastic box.

Make some hole as per your circuit board dimension for your switch, charging port and also for ultrasonic sensor.

And also make some hole on the circuit board for fixing the board with plastic box.

Download this image for scaling.

Make an arrow with the cardboard. And fix the servo with glue on the plastic box's front case.

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