09 May 2024


The Arduino platform has revolutionized the world of electronics and now, it can even help you measure weight accurately. In this step-by-step guide, we will show you how to measure weight using Arduino.

Before we dive into the steps, here are the components you will need:
1. Arduino board (such as Arduino Uno)
2. Load sensor or force sensor (such as HX711)
3. Load cell (to connect the load sensor to the object whose weight you want to measure)
4. Breadboard
5. Wires

Step 1: Connect the Load Sensor to Arduino
Start by connecting the load sensor to the Arduino board. Connect the red wire of the load sensor to the 5V pin on the Arduino board, the black wire to the GND pin, the white wire to the A0 pin, and the green wire to the A1 pin.

Step 2: Connect the Load Cell to the Load Sensor
Next, connect the load cell to the load sensor. There are four wires coming out of the load cell – red, black, white, and green. Connect the red and black wires to the E+ and E- pins on the load sensor, and the white and green wires to the A+ and A- pins.

Step 3: Install the HX711 Library
To communicate with the load sensor, you will need to install the HX711 library on your Arduino IDE. Go to Sketch > Include Library > Manage Libraries and search for “HX711.” Install the library and restart your Arduino IDE.

Step 4: Write the Code
Now, it’s time to write the code for measuring weight. Here is a sample code that you can use:

#include “HX711.h”

HX711 scale(A0, A1);

void setup() {
Serial.begin(9600);
scale.set_scale();
scale.tare();
}

void loop() {
Serial.print(“Weight: “);
Serial.print(scale.get_units(), 1);
Serial.println(” kg”);
delay(1000);
}

Step 5: Upload the Code to Arduino
Upload the code to your Arduino board and open the Serial Monitor in the Arduino IDE. You should see the weight of the object displayed in kilograms.

And there you have it – a simple and effective way to measure weight using Arduino. This project can be incredibly useful for various applications, such as building a weight scale or a smart home automation system.

With the step-by-step guide provided above, you should be able to successfully measure weight using Arduino. Have fun experimenting with this project and discovering new ways to apply it in your electronics projects!

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