HC-SR0 Ultrasonic Distance Sensor Module

Product Description:

Product Specifications

Specification	Value
Measuring Range	2cm - 400cm
Accuracy	±3mm
Power Supply	5V DC
Operating Current	15mA
Output Signal	TTL level (0V/5V)
Measurement Angle	<15 degrees
Dimensions	45mm x 20mm x 15mm (approx.)
Weight	2g (approx.)

Features

• Non-contact measurement for safe and reliable operation  
• High accuracy and precision |
• Wide measuring range  
• Low power consumption  
• Simple to use and integrate
• Compact and lightweight design

Applications

• Robotics and obstacle avoidance  
• Automated guided vehicles (AGVs)
• Level measurement
• Parking assistance systems
• Presence detection  
• DIY projects and experiments

Pinout and Usage

Pin	Function	Connection
VCC	Power Supply	Connect to +5V power source
GND	Ground	Connect to ground
Trig	Trigger	Connect to a digital output pin of your microcontroller (e.g., Arduino Digital Pin 13). A short pulse (10us) on this pin initiates the measurement.
Echo	Echo	Connect to a digital input pin of your microcontroller (e.g., Arduino Digital Pin 12). This pin receives the echo pulse from the target object.

How to Use the HC-SR04 Ultrasonic Distance Sensor Module

1. Wiring: Connect the module to your microcontroller as per the pinout table.
2. Triggering: Send a short pulse (10us) to the Trig pin to initiate the measurement.
3. Echo Reception: Read the duration of the echo pulse on the Echo pin.  
4. Distance Calculation: Calculate the distance to the object using the formula: Distance = (Duration / 2) * Speed of Sound (Speed of Sound in air is approximately 343 m/s at 20°C).

Example (Arduino)

C++

const int trigPin = 13; // Trig pin connected to Arduino Digital Pin 13
const int echoPin = 12; // Echo pin connected to Arduino Digital Pin 12

// Speed of sound in cm/uS
const float speedOfSound = 0.0343;

void setup() {
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT);
  Serial.begin(9600);
}

void loop() {
  // Trigger the sensor
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the duration of the echo pulse
  long duration = pulseIn(echoPin, HIGH);

  // Calculate the distance
  float distance = duration * speedOfSound / 2;

  // Print the distance to the serial monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  delay(100); // Wait for 100ms before the next measurement
}

Note:

• The specific library functions and usage will vary depending on the microcontroller and the library you are using.
• Refer to the library documentation and examples for detailed usage instructions.

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