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If you are a beginner in the world of electronics and looking to learn how to interface HX711 load cell with Arduino, then you have come to the right place. In this tutorial, we will cover the basics of HX711 load cell and how to interface it with an Arduino.
Before we dive into the tutorial, it’s important to understand what an HX711 load cell is and its applications. The HX711 is a precision 24-bit analog-to-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor. It can measure small changes in weight and is commonly used in weighing scales, industrial automation, and robotics.
Now, let’s get started with the tutorial on how to interface HX711 load cell with Arduino.
1. Gather the necessary components
To interface HX711 load cell with Arduino, you will need the following components:
– HX711 load cell amplifier
– Load cell (strain gauge)
– Arduino board (such as Arduino UNO)
– Breadboard
– Jumper wires
2. Wiring the components
Start by wiring the components on a breadboard. Connect the HX711 load cell amplifier to the Arduino using jumper wires. Make sure to connect the VCC pin of the HX711 to the 5V pin of the Arduino, the GND pin to the ground pin of the Arduino, the DT (data) pin to digital pin 2 of the Arduino, and the SCK (clock) pin to digital pin 3 of the Arduino. Also, connect the load cell to the HX711 amplifier as per the datasheet of the load cell.
3. Install the HX711 library
In order to interface the HX711 with Arduino, you will need to install the HX711 library. Open the Arduino IDE, go to Sketch > Include Library > Manage Libraries, and search for “HX711”. Install the HX711 library by Bogde.
4. Write the Arduino code
Now, it’s time to write the Arduino code. Open a new sketch in the Arduino IDE and paste the following code:
#include “HX711.h”
#define DOUT 2
#define CLK 3
HX711 scale;
void setup() {
Serial.begin(9600);
scale.begin(DOUT, CLK);
}
void loop() {
Serial.print(“Reading: “);
Serial.print(scale.get_units(), 1);
Serial.print(” kg”);
delay(1000);
}
This code initializes the HX711 library and reads the weight from the load cell. It then prints the weight in kilograms to the serial monitor.
5. Upload and test the code
Upload the code to the Arduino board and open the serial monitor. You should see the weight readings from the load cell displayed in the serial monitor.
That’s it! You have successfully interfaced the HX711 load cell with Arduino. You can now use this setup to build your own weight scales or integrate it into other projects.
In conclusion, interfacing HX711 load cell with Arduino is a simple and valuable skill for anyone interested in electronics and automation. With the right components and a little bit of programming, you can create your own projects using load cells and Arduino. So, go ahead and experiment with different load cells and Arduino to explore the endless possibilities in the world of electronics.
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