Arduino Distance Detector With a Buzzer and LED

8/16/2019 Arduino Distance Detector With a Buzzer and LED

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Arduino Distance Detector with a Buzzer and LED's

Step 1: Materials Needed

The Materials needed for this project are:

• (1x) Arduino Uno

• (1x) Breadboard

• (1x) HC-!"# Ultrasonic ensor

• (1x) Bu$$er

• (%x) &reen 's

• (%x) *ello+ 's

• (%x) !ed 's

• (,x) . oh/ !esistors

• A lot of ju/per +ires



Step 2: Setup

The photo abo0e sho+s the setup of the project The ju/per +ires shouldbe connected as follo+s:

Connect a ju/per +ire fro/ the 2 0olt pin on the Arduino to the botto/

channel of the breadboardConnect another ju/per +ire fro/ a 3round pin on the arduino to theupper channel of the breadboard

Bu$$er -4 pin

("n Ultrasonic ensor)cho -4 pin 5 Tri3 -4 pin ,

(6n "rder fro/ !i3ht to 'eft)

'1 -4 pin 7'% -4 pin 8' -4 pin 1.'# -4 pin 11'2 -4 pin 1%'5 -4 pin 1

The ju/per +ires connected to the 's should be connected to the leadon the ri3ht9 +hile the left lead of the ' should connected to the 3roundchannel 0ia a . oh/ resistor



Step 3: Assembly: Breadboard

irst thin3s ;rst9 let<s connect the 2 0olt and 3round pin to the breadboard

A3ain9 the +ire attached to the 2 0olt pin should be connected to the

botto/ channel of the breadboard9 +hile the +ire attached to the 3round

pin should be connected to the upper channel of the breadboard

Step 4: Assembly: Ultrasonic Sensor



=o+ it<s ti/e to attach the HC-!"# ultrasonic sensor 6t is easiest to

place the ultrasonic sensor as far ri3ht to the breadboard as possible

!eferrin3 bac> to the setup picture9 ?ou should connect the 3round pin on

the ultrasonic sensor to the 3round channel on the breadboard =extconnect the cho pin on the sensor to pin 5 on the Arduino =o+ connect

the Tri3 pin on the sensor to pin , on the Arduino9 and lastl? connect the

@CC pin on the sensor to the 2 0olt channel on the breadboard 6f ?ou did

that all correctl?9 ?our asse/bl? should loo> li>e the picture abo0e

Step 5: Assembly: LEDs

=ext is connectin3 the '<s to the breadboard and Arduino "nce a3ain

referrin3 bac> to the setup picture9 attachin3 the 's is prett? basic9 just

+ith a lot of repetition The +a? to connect the/ is to connect the anode9

or the lon3er le39 or the one on the ri3ht9 to a pin on the Arduino +ith a ju/per +ire9 and to connect the cathode9 or the shorter le39 or the one on

the left9 to the 3round channel on the breadboard usin3 a . oh/

resistor Then just repeat that step for all six of the 's9 +ith the red '

all the +a? on the ri3ht bein3 connected to pin 7 on the Arduino9 the

anode of the red ' to the left of that one bein3 connected to pin 8 on

the Arduino9 and so on The last '9 that bein3 the 3reen ' all the +a?

on the left9 should ha0e its anode9 or ri3ht le39 connected to pin 1 on the

Arduino "nce ?ou ha0e done that9 ?our setup should loo> so/ethin3 li>e

this



6C'A6M!

!esistors are not absolutel? necessar? for the build9 ho+e0er the are

hi3hl? reco//ended to be used The onl? reason 6 a/ not usin3 the/ is

because 6 don<t ha0e enou3h resistors

Step 6: Assembly: Buzzer

The last part of the ph?sical setup for this build is attachin3 the bu$$er to

the breadboard and the Arduino This part is probabl? the easiest part of

the setup All ?ou ha0e to do is attach the lon3er le3 of the bu$$er to pin

of the Arduino and attach the shorter le3 of the bu$$er to the 3round

channel of the breadboard

6C'A6M!

6t is H6&H'* reco//ended to use a resistor in connectin3 the shorter le3

of the bu$$er to the 3round channel of the breadboard This 3reatl?

reduces the 0olu/e of the bu$$er *ou don<t ha0e to use a resistor9 but if

?ou don<t9 the bu$$er +ill be 0er? loud and uite fran>l? anno?in3



Step 7: The Code

Now that you have finished the physical setup of the build, now its time for the

code. I assume that you already have the Arduino program on your computer,

so now all you have to do is copy and paste the code from below.

#define trigPin 7

#define echoPin 6

#define led 13

#define led2 12

#define led3 11

#define led4 10

#define led5 9

#define led6 8

#define buzzer 3

int sound = 250;

void setup() {

Serial.begin (9600);

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

pinMode(led, OUTPUT);

pinMode(led2, OUTPUT);





pinMode(buzzer, OUTPUT);



}

void loop() {

long duration, distance;

digitalWrite(trigPin, LOW);

delayMicroseconds(2);

digitalWrite(trigPin, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance = (duration/2) / 29.1;

if (distance <= 30) {

digitalWrite(led, HIGH);

sound = 250;

}

else {

digitalWrite(led,LOW); }

if (distance < 25) {

digitalWrite(led2, HIGH);

sound = 260;

}

else {

digitalWrite(led2, LOW);

} if (distance < 20) {


sound = 270;

}

else {

digitalWrite(led3, LOW);

}

if (distance < 15) { digitalWrite(led4, HIGH);



sound = 280;

}

else {

digitalWrite(led4,LOW);

}

if (distance < 10) {


sound = 290;

}

else {


}

if (distance < 5) {


sound = 300;

}

else {


}

if (distance > 30 || distance <= 0){

Serial.println("Out of range");

noTone(buzzer);

}

else {

Serial.print(distance);

Serial.println(" cm");

tone(buzzer, sound);

}

delay(500);

}

Once you've done that, and you've plugged in your Arduino to your computer,



run the code and you're finished. If you've followed all the directions, the

closer you're hand gets to the HC-SRO4, the LEDs should progressively light

up until and the closer your hand gets, the buzzer will produce a higher tone

each time.

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Arduino Distance Detector With a Buzzer and LED