Laser Pointer Ultrasonic Distance Finder

3,582

72

5

Posted in TechnologyArduino

Introduction: Laser Pointer Ultrasonic Distance Finder

About: Aerospace Engineer working in Software Development with a passion for Hardware.

This is a ultrasonic distance measuring tool with a laser pointer to find the exact range for that particular point in space. It's also a nice touch if you want to have 'spidey' senses at a comic-con.

This is instructables is made with the request of fellow author @watchmeflyy as well as other members of the community.

Step 1: Circuit

Step 2: Mount Laser

Glue the laser on top of the Ultrasonic sensor. The closer it is to the centroid of the sensor the more accurate the readings will be as the offset source of error will be very limited.

Step 3: Code

#include  <LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);
const int trigPin = 9;
const int echoPin = 10;
long duration;
int distanceCm, distanceInch;
void setup() {
  
lcd.begin(16,2); 
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
void loop() {
  
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distanceCm= duration*0.034/2;
distanceInch = duration*0.0133/2;
// cm distance
// column 0 row 0
lcd.setCursor(0,0); 
lcd.print("Distance: "); 
lcd.print(distanceCm); 
lcd.print("  cm");
delay(10);
//imperial distance
// coloumn 0, row 1
lcd.setCursor(0,1);
lcd.print("Distance: ");
lcd.print(distanceInch);
lcd.print("inch");
delay(100);
}

Step 4: Enjoy!

Wear it as a wrist watch for your spidey senses or just hold it on your hand like a normal person. Aim and measure!

Enjoy!

Share

    Recommendations

    • Trash to Treasure

      Trash to Treasure
    • Science of Cooking

      Science of Cooking
    • Pocket-Sized Contest

      Pocket-Sized Contest
    user

    We have a be nice policy.
    Please be positive and constructive.

    Tips

    Questions

    5 Comments

    This is a good candidate for the 'NewPing' library, better timing and simpler code.

    Get library here : https://bitbucket.org/teckel12/arduino-new-ping/downloads/NewPing_v1.8.zip

    this is a wrong project, i think the Ultrasonic cannt measure a laser pointer

    Just so we are clear, the laser has nothing to do with the operation of the sensor, except to help visualize where the sensor is pointed, right?

    2 replies