HC-SR04 Ultrasonic Distance Measurement Module

Description

What it is

The HC-SR04 Ultrasonic Module is a device used for precise distance measurement. It is designed to be integrated into various types of electronic devices, such as robots and security systems.

Features

• Measures distance using ultrasonic waves;
• Ideally suited for Arduino projects;
• Check the datasheet for detailed technical specifications.

What it is for

The HC-SR04 is primarily used for obstacle detection and distance measurement in robotic projects, security systems, and DIY applications. It is compatible with Arduino and ESP.

Tutorial: How to use HC-SR04

The HC-SR04 Ultrasonic Module measures distance with precision, ideal for obstacle detection and measurement projects.

What you need

• Arduino UNO or compatible
• Power cable
• 1 kΩ resistor
• Connection cable

Steps

1. 1. Connect VCC to 5V of the Arduino.
2. 2. Connect GND to GND of the Arduino.
3. 3. Connect TRIG to a digital pin (e.g., 9).
4. 4. Connect ECHO to a digital pin (e.g., 10).
5. 5. Connect the 1 kΩ resistor between TRIG and GND.
6. 6. Load the provided Arduino code.
7. 7. Check the datasheet for the maximum values of VCC.
8. 8. Test the module with a series of measurements.

Example code

```int trigPin = 9; int echoPin = 10; void setup() { pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); Serial.begin(9600); } void loop() { long duration, distance; digitalWrite(trigPin, LOW); delayMicroseconds(2); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); duration = pulseIn(echoPin, HIGH); distance = duration / 58; Serial.print("Distance: "); Serial.print(distance); Serial.println(" cm"); delay(1000); } ```

Mini project

Create an obstacle detection system for a mobile robot.

Common mistakes

• Connect ECHO to an analog pin.
• Omit the 1 kΩ resistor.
• Impose a value too high for VCC.
• Forget to check the maximum values for VCC.

Recommended accessories

• Arduino UNO
• 1 kΩ resistor
• Connection cable

Frequently asked questions

Does the module work with Arduino Nano?
Yes, it works with any compatible Arduino.

What are the measurement limits?
The maximum limits are indicated in the datasheet.

Does the module work with batteries?
Check the datasheet for the maximum values of VCC.