Description:

This is the HC-SR04 ultrasonic ranging sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground). You will find this sensor very easy to set up and use for your next range-finding project!

شرح :

Features:

• Operating Voltage: 5V DC
• Operating Current: 15mA
• Measure Angle: 15°
• Ranging Distance: 2cm - 4m

Documents:

• Datasheet
• Example Code

Mikroelectron Code:

/*
  Mikroelectron coding center
  by Eng.Mahmoud Sukker
*/

#define echoPin 7 // Echo Pin
#define trigPin 8 // Trigger Pin
#define LEDPin 13 // Onboard LED
long durationdistance; // Duration used to calculate distance

void setup() {
  Serial.begin (9600);
  pinMode(trigPinOUTPUT);
  pinMode(echoPinINPUT);
  pinMode(LEDPinOUTPUT);
}

void loop() {
  digitalWrite(trigPinLOW);
  delayMicroseconds(2);

  digitalWrite(trigPinHIGH);
  delayMicroseconds(10);

  digitalWrite(trigPinLOW);
  duration = pulseIn(echoPinHIGH);

  //Calculate the distance (in cm) based on the speed of sound.
  distance = duration / 58.2;
  Serial.println(distance);
  if (distance < 10)digitalWrite(LEDPinHIGH);
  else digitalWrite(LEDPinLOW);
  delay(500);
  //Delay 500ms before next reading.
}