Membuat Meteran Digital

Introduction

In this tutorial, we will learn how to create a digital measuring device using an ultrasonic sensor. This project is perfect for those interested in electronics and programming, especially with Arduino. We will guide you through the necessary components, assembly, and programming required to build your own digital meter.

Step 1: Gather Your Materials

To start, you will need the following components:

• Switch
• 18650 battery
• Ultrasonic sensor
• Black box for housing
• Arduino Nano
• LCD 16x2 display
• Source code (downloadable from here)

Make sure you have all these components ready before moving on to the assembly phase.

Step 2: Assemble the Circuit

Follow these steps to assemble the circuit:

1. Connect the Ultrasonic Sensor:

   • Connect the VCC pin of the ultrasonic sensor to the +5V pin on the Arduino.
   • Connect the GND pin to the GND pin on the Arduino.
   • Connect the Trig pin to a digital pin (e.g., pin 9).
   • Connect the Echo pin to another digital pin (e.g., pin 10).

2. Set Up the LCD:

   • Connect the LCD pins as follows:
     • VSS to GND
     • VDD to +5V
     • V0 to a potentiometer (for contrast adjustment)
     • RS to pin 12 on the Arduino
     • RW to GND
     • E to pin 11 on the Arduino
     • D4 to pin 5, D5 to pin 4, D6 to pin 3, D7 to pin 2 on the Arduino.

3. Connect the Switch:

   • Connect one terminal of the switch to the GND and the other terminal to a digital pin (e.g., pin 7).

4. Power Supply:

   • Connect the 18650 battery to the circuit, ensuring the correct polarity.

Step 3: Upload the Code

Now, you'll need to upload the Arduino code to make your digital meter functional.

1. Download the Code:

   • Access the source code from the provided link.

2. Open Arduino IDE:

   • Launch the Arduino IDE on your computer.

3. Load the Code:

   • Copy the downloaded code into the IDE or open the file directly.

4. Select the Right Board:

   • Make sure to select "Arduino Nano" in the board settings.

5. Upload the Code:

   • Click on the upload button to transfer the code to your Arduino Nano.

Step 4: Test Your Digital Meter

After uploading the code, it’s time to test your digital meter.

1. Power On:

   • Turn on the switch to power your device.

2. Check the LCD:

   • The LCD should display the distance measured by the ultrasonic sensor.

3. Adjust and Calibrate:

   • If necessary, adjust the potentiometer connected to the LCD for better visibility.
   • Test the device at various distances to ensure accurate readings.

Conclusion

You have successfully built a digital measuring device using an ultrasonic sensor and an Arduino Nano. This project enhances your understanding of electronics and coding. For further exploration, consider adding features like data logging or wireless transmission. Enjoy experimenting and expanding your digital meter project!