An Introduction to Using Button Load Cells with Arduino

Button load cells are a versatile and useful tool for measuring force or weight in a variety of applications. When combined with an Arduino microcontroller, they become even more powerful, allowing for precise measurements and data analysis. In this article, we will explore the basics of using button load cells with Arduino, and how they can be integrated into various electronic projects.

Button load cells are devices specifically designed to measure compression force. They contain a strain gauge that deforms under force, which changes its resistance. This change in resistance is then converted into a voltage signal that can be read by an Arduino. By measuring this voltage signal, you can determine the amount of force or weight applied to the load cell.

To begin using a button load cell with Arduino, you will need the following components:

– A button load cell
– An Arduino board (such as the Arduino Uno)
– A HX711 amplifier module
– Jumper wires
– A breadboard (optional)

First, you will need to connect the components together. Start by connecting the red wire from the load cell to the E+ terminal on the HX711 module, the black wire to the E- terminal, the white wire to the A- terminal, and the green wire to the A+ terminal. Then, connect the VCC pin on the HX711 module to the 5V pin on the Arduino, the GND pin to the GND pin, the DT pin to digital pin 3, and the SCK pin to digital pin 2.

Next, you will need to install the HX711 library in the Arduino IDE. This library can be found in the Arduino Library Manager. Once installed, you can upload the following code to your Arduino:


#define DOUT 3
#define CLK 2

HX711 scale(DOUT, CLK);

void setup() {

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

This code will continuously read the weight from the load cell and display it on the serial monitor in kilograms. You can modify the code to display the weight in different units or to trigger certain actions based on the weight readings.

In conclusion, using button load cells with Arduino is a straightforward process that can yield accurate and reliable force or weight measurements. By following these steps and experimenting with the code, you can incorporate button load cells into various electronic projects, such as robotics, home automation, or industrial automation. If you have any questions or need further assistance, feel free to reach out to Sharp Electronics Pune for guidance and support.

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