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How to Interface HX711 with Arduino for Weight Measurement


If you are looking to build an electronic scale or a weight measurement application, interfacing the HX711 with an Arduino can be a crucial step. 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.
In this article, we will guide you through the process of interfacing the HX711 with an Arduino for weight measurement. This guide is especially useful for electronic enthusiasts and engineers at Sharp Electronics Pune who are looking to incorporate weight measurement features into their products or projects.
Materials Required:
To interface HX711 with Arduino, you will need the following materials:
• HX711 Module
• Load Cell or Weight Sensor
• Arduino Board (e.g. Arduino Uno, Nano, or Mega)
• Connecting wires
• Breadboard (optional)
• Power Supply
Connections:
The connections between the HX711 module, load cell, and Arduino are fairly straightforward. Connect the HX711 module and the load cell as follows:
• Red wire of the load cell to E+ pin of the HX711
• Black wire of the load cell to E- pin of the HX711
• White wire of the load cell to A- pin of the HX711
• Green wire of the load cell to A+ pin of the HX711
• VCC to Arduino 5V pin
• GND to Arduino GND pin
• DT to Arduino digital pin 2
• SCK to Arduino digital pin 3
Code:
Once the connections are made, you can proceed with writing the code to interface the HX711 with the Arduino. You can use the HX711 library for Arduino, which makes it easier to read data from the HX711 chip. Alternatively, you can also write your own code to read the raw data from the HX711 and perform the necessary calculations to obtain the weight measurement.
Testing:
After uploading the code to the Arduino, you can test the setup by applying weight to the load cell and observing the readings on the serial monitor of the Arduino IDE. Make sure to calibrate the load cell and the HX711 module to ensure accurate weight measurements.
Applications:
Once the HX711 is interfaced with the Arduino successfully, you can incorporate it into various applications such as electronic scales, industrial control systems, and IoT devices. The weight measurement data can be further processed and utilized in different ways based on the specific requirements of the project.
In conclusion, interfacing the HX711 with an Arduino for weight measurement is a valuable skill for electronics enthusiasts and engineers, especially at Sharp Electronics Pune. By following the steps outlined in this article, you can successfully interface the HX711 with an Arduino and incorporate weight measurement features into your projects or products.

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