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    تحكم تجربة 5 ⬇️

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    jasmhmyd205
    The document describes an ultrasonic sensor that uses sonar to determine the distance to objects, ranging from 2cm to 400cm. It provides the specifications, required components (including the sensor, breadboard, and Arduino Uno), and two example projects - one that prints the distance to an object on an LCD every 3 seconds, and another that controls LEDs and a buzzer based on distance thresholds. The sensor works by emitting sound from the trigger pin, receiving the echo via the echo pin to determine the distance based on the time it takes to return.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    تحكم تجربة 5 ⬇️

    Uploaded by

    jasmhmyd205
    11 views4 pages
    The document describes an ultrasonic sensor that uses sonar to determine the distance to objects, ranging from 2cm to 400cm. It provides the specifications, required components (including the sensor, breadboard, and Arduino Uno), and two example projects - one that prints the distance to an object on an LCD every 3 seconds, and another that controls LEDs and a buzzer based on distance thresholds. The sensor works by emitting sound from the trigger pin, receiving the echo via the echo pin to determine the distance based on the time it takes to return.

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    The document describes an ultrasonic sensor that uses sonar to determine the distance to objects, ranging from 2cm to 400cm. It provides the specifications, required components (including the sensor, breadboard, and Arduino Uno), and two example projects - one that prints the distance to an object on an LCD every 3 seconds, and another that controls LEDs and a buzzer based on distance thresholds. The sensor works by emitting sound from the trigger pin, receiving the echo via the echo pin to determine the distance based on the time it takes to return.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    11 views4 pages

    تحكم تجربة 5 ⬇️

    Uploaded by

    jasmhmyd205
    The document describes an ultrasonic sensor that uses sonar to determine the distance to objects, ranging from 2cm to 400cm. It provides the specifications, required components (including the sensor, breadboard, and Arduino Uno), and two example projects - one that prints the distance to an object on an LCD every 3 seconds, and another that controls LEDs and a buzzer based on distance thresholds. The sensor works by emitting sound from the trigger pin, receiving the echo via the echo pin to determine the distance based on the time it takes to return.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 4

    Ultrasonic sensor

    ITROUCTION:

    Arduino - Ultrasonic Sensor: The HC-SR04 ultrasonic sensor uses SONAR to


    determine the distance of an object just like the bats do. It offers excellent non-
    contact range detection with high accuracy and stable readings in an easy-to-
    use package from 2 cm to 400 cm or 1” to 13 feet.
    The operation is not affected by sunlight or black material, although
    acoustically, soft materials like cloth can be difficult to detect. It comes
    complete with ultrasonic transmitter and receiver module.

    Technical Specifications
    • Power Supply − +5V DC
    • Quiescent Current − <2mA
    • Working Current − 15mA
    • Effectual Angle − <15°
    • Ranging Distance − 2cm – 400 cm/1″ – 13ft
    • Resolution − 0.3 cm
    • Measuring Angle − 30 degree
    1
    Components Required

    You will need the following components −

    1 × Breadboard
    •
    • 1 × Arduino Uno R3
    • 1 × ULTRASONIC Sensor (HC-SR04).
    …………………………………………………………………………………………………………………………………

    Project (1): Design MCU system to find distance of an object and print the
    distance on LCD with 3 seconds update period?
    #include <LiquidCrystal.h>
    int trigger=8;
    int echo=9;
    LiquidCrystal lcd(12,11,5,4,3,2);
    float time=0,distance=0;
    void setup)( {
    lcd.begin(16,2);
    pinMode(trigger,OUTPUT);
    pinMode(echo,INPUT);
    lcd.print(" Ultra sonic");
    lcd.setCursor(0,1);
    lcd.print("Distance Meter);
    delay(2000);
    lcd.clear();
    lcd.print(" Circuit Digest");
    delay(2000); }
    void loop() {
    lcd.clear();
    digitalWrite(trigger,LOW);
    delayMicroseconds(2);
    digitalWrite(trigger,HIGH);
    delayMicroseconds(10);
    digitalWrite(trigger,LOW);
    delayMicroseconds(2);
    time=pulseIn(echo,HIGH);
    distance=time*0.034/2;
    lcd.clear();
    lcd.print("Distance");
    2
    lcd.print(distance);
    lcd.print("cm");
    lcd.setCursor(0,1);
    lcd.print("Distance");
    lcd.print(distance/1000);
    lcd.print("m");
    delay(1000); }

    .…………………………………………………………………………………………………………………………………..

    Project(2): Design MCU system to find distance of an object and print the
    distance on LCD, when the distance is less than 20 cm, a green led is turn on
    and when the distance become less than 12 cm, a red led should be turned on
    and when it is less than 10 cm, a warning sound generated from buzzer is
    turned on.
    #define echoPin 9
    #define trigPin 8 long duration;
    int distance;
    void setup() { pinMode(trigPin, OUTPUT);
    pinMode(echoPin, INPUT);
    Serial.begin(9600);
    Serial.println("Ultrasonic Sensor HC-SR04 Test");
    Serial.println("with Arduino UNO R3"); }
    void loop() { digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    duration = pulseIn(echoPin, HIGH);
    distance = duration *0.034/2;
    Serial.print(distance);
    Serial.println("cm");
    if(distance<20){
    digitalWrite(3,1); }
    else if(distance>20){
    digitalWrite(2,1); } }

    3
    Code to Note:

    The Ultrasonic sensor has four terminals - +5V, Trigger, Echo, and GND
    connected as follows −
    • Connect the +5V pin to +5v on your Arduino board.
    • Connect Trigger to digital pin 7 on your Arduino board.
    • Connect Echo to digital pin 6 on your Arduino board.
    • Connect GND with GND on Arduino.
    In our programs, we have displayed the distance measured by the sensor in
    inches and cm via the serial port.
    Result

    You will see the distance measured by sensor in inches and cm on Arduino serial
    monitor.

    How Does it Work?


    The ultrasonic sensor uses sonar to determine the distance to an object.
    Here’s what happens:

    1. The ultrasound transmitter (trig pin) emits a high-frequency sound (40


    kHz).
    2. The sound travels through the air. If it finds an object, it bounces back
    to the module.
    3. The ultrasound receiver (echo pin) receives the reflected sound
    (echo).

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