Arduino With distance sensor

Hi guys In here I am going to show you have to work with distance sensor(Ultrasonic sensor – HCSR04)

In above sensor, You find it easy to see 4 pins there…

1.VCC - for operate the sensor (5v)

2.GND - for ground (GND) from Arduino development board.

3.trig - for, send signal from the sensor

4.echo - for, receive the signal from object.

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🛠️ เจาะลึกเบื้องหลังการทำงาน (Deep Dive / Technical Analysis)

The LCD Distance Meter is a classic project that combines physics and electronics. By measuring the flight time of sound waves, the Arduino can calculate the distance to an object with impressive precision (within millimeters).

The Physics Behind It

The project uses an HC-SR04 Ultrasonic Sensor.

1. The Trigger: The Arduino sends a 10-microsecond high pulse to the sensor.
2. The Chirp: The sensor emits eight pulses of ultrasound at 40kHz.
3. The Echo: The pulses bounce off an object and return to the sensor.
4. The Calculation: The Arduino calculates the distance using the formula: Distance = (Time * 0.034) / 2.

Components Needed

• Arduino (any model): To perform the math.
• HC-SR04 Ultrasonic Sensor: The transmitter and receiver.
• 16x2 LCD Display: To show the distance in centimeters or inches.
• 10k Potentiometer: To adjust the contrast of the LCD screen.
• Breadboard and Jumper Wires.

Practical Applications

Beyond being a "digital ruler," this system can be adapted for:

• Water Level Monitoring: Measuring the distance to the surface of the water in a tank.
• Parking Sensors: Providing visual or auditory alerts as a vehicle gets closer to a wall.
• Industrial Sorting: Measuring the height of boxes on a conveyor belt.