This project demonstrates how to use an ultrasonic sensor (such as the HC-SR04) with an Arduino to measure distances. The code calculates the distance by sending out an ultrasonic pulse and timing how long it takes to return after bouncing off an object.
- Arduino (Uno, Nano, etc.)
- Ultrasonic Sensor (HC-SR04)
- Breadboard
- Jumper wires
- USB cable (for programming and power)
| Pin on HC-SR04 | Connects to |
|---|---|
| VCC | 5V on Arduino |
| GND | GND on Arduino |
| Trig | Digital Pin 9 |
| Echo | Digital Pin 10 |
The project includes a simple Arduino sketch that:
- Sends a pulse from the
Trigpin of the ultrasonic sensor. - Measures the time it takes for the pulse to return to the
Echopin. - Converts this time into distance using the speed of sound in air.
- Displays the distance in centimeters on the serial monitor.
If you prefer a simpler calculation, you can use:
long distance = duration / 58;
This formula directly converts the time taken by the pulse to return into distance in centimeters.
1.Assemble the Circuit: Connect the components as described in the circuit diagram.
2.Upload the Code: Open the Arduino IDE. Copy the provided code into the IDE. Select the correct board and port under the "Tools" menu. Click "Upload" to program the Arduino.
3.View the Results:
Open the Serial Monitor from the Arduino IDE (Ctrl + Shift + M). Observe the distance readings in centimeters.
This project is open-source and available under the MIT License. You are free to use, modify, and distribute the code as you wish.