Meter To MEASURE Short DISTANCE Arduino
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To measure short distances using an Arduino, you can use a variety of sensors. One popular choice is the ultrasonic distance sensor, which is both affordable and easy to use. The HC-SR04 ultrasonic sensor is a commonly used sensor for this purpose. Here's how you can set it up and use it to measure short distances:
Components needed:
• Arduino board (e.g., Arduino Uno)
• HC-SR04 ultrasonic distance sensor
• Breadboard and jumper wires
Wiring: Connect the components as follows:
• VCC of HC-SR04 to 5V on Arduino
• GND of HC-SR04 to GND on Arduino
• Trig (Trigger) pin of HC-SR04 to any digital pin (e.g., D2) on Arduino
• Echo pin of HC-SR04 to any digital pin (e.g., D3) on Arduino
Arduino Code: Below is a simple Arduino sketch to measure distance using the HC-SR04 sensor.
#define TRIGGER_PIN 2
#define ECHO_PIN 3
void setup() {
Serial.begin(9600);
pinMode(TRIGGER_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
}
void loop() {
// Trigger the ultrasonic sensor by sending a 10 microsecond pulse
digitalWrite(TRIGGER_PIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIGGER_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIGGER_PIN, LOW);
// Measure the time it takes for the echo to return
long duration = pulseIn(ECHO_PIN, HIGH);
// Calculate the distance based on the speed of sound (343.2 m/s)
// Divide by 2 as the sound travels back and forth
float distance = (duration * 0.03432) / 2;
// Print the distance in centimeters and inches
Serial.print("Distance: ");
Serial.print(distance);
Serial.print(" cm - ");
Serial.print(distance * 0.3937);
Serial.println(" inches");
delay(100); // Add a small delay before the next measurement
}
Upload the code to your Arduino using the Arduino IDE or any other compatible software. Testing the setup: Open the Serial Monitor in the Arduino IDE (or any other serial monitor application) to see the measured distances. Hold an object in front of the ultrasonic sensor, and you should see the distance displayed in centimeters and inches. Remember that the HC-SR04 is suitable for measuring short distances up to a few meters accurately. Beyond that, the accuracy might degrade. For longer distances or more precise applications, you might consider using other sensors like infrared distance sensors or laser distance sensors.
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