Introduction: Arduino Range Finder Tutorial

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Make your first project with an arduino UNO or any arduino, and a range finder sensor

Step 1: Make Sure You've Got Everything!

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Your gunna need- 4 jumper wires 1 arduino ( I used UNO) 1 breadboard 1 data cable to program the arduino 1 hc-sro4 sensor

Step 2: Plug Your Sensor Into the Breadboard

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Put your sensor into the breadboard along with 4 jumper wires.

Step 3: Attach to Arduino

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Gnd - gnd Echo- digital pin 2 Trig - digital pin 3 Vcc - 5v

Step 4: Write the Code

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Just copy from photo

Step 5: Plug in and Upload

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Plug your arduino into your pc and upload. Open serial monitor in top right corner and have fun. You can use this with hundreds of projects good luck


sky_jim (author)2016-09-25

Thanks supah,

Minor outputting improvement can be had with:


Serial.println(" cm");

supah4x0r (author)2015-04-08

#define trigPin 3

#define echoPin 2

void setup()



pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);


void loop()


int duration, distance;

digitalWrite(trigPin, HIGH);


digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance = (duration/2) / 29.1;





supah4x0r (author)2015-04-08

Nice, simple, very well done.

JoeS9 (author)2014-12-26

Excellent basic tutorial, it helped me set mine up with a minimum of problems.

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