12 May 2024


In today’s technologically advanced world, building your own digital scale can be a fun and educational project. By using an Arduino microcontroller, you can create a custom-built scale that is not only accurate but also customizable to fit your specific needs. In this step-by-step guide, we will walk you through the process of building a digital scale using Arduino.

Before we get started, here is a list of materials you will need for this project:

– Arduino Uno or similar microcontroller
– Load cell sensor
– HX711 amplifier
– LCD display
– Button
– Resistors
– Wires
– Breadboard
– Soldering iron and solder
– Enclosure (optional)

Step 1: Setting up the Load Cell Sensor

First, you will need to wire the load cell sensor to the HX711 amplifier. The load cell sensor will be responsible for measuring the weight, while the HX711 amplifier will amplify and convert the output signal from the sensor to a digital value that can be read by the Arduino. Make sure to follow the wiring diagram provided by the manufacturer to connect the load cell sensor to the HX711 amplifier correctly.

Step 2: Connecting the Components to the Arduino

Next, you will need to connect the HX711 amplifier, LCD display, and button to the Arduino. Use jumper wires to connect the components following the wiring diagram provided in the Arduino sketch. Make sure to pay attention to the pin configurations to ensure everything is connected correctly.

Step 3: Programming the Arduino

Now, it’s time to upload the code to the Arduino. You can find a sample code for a digital scale project online or create your own custom code. The code will read the output from the load cell sensor, display the weight on the LCD display, and allow you to calibrate the scale using the button. Once you have uploaded the code to the Arduino, test the scale to ensure everything is working as expected.

Step 4: Calibration

To ensure the accuracy of your digital scale, you will need to calibrate it. Place a known weight on the scale, such as a calibration weight, and adjust the calibration factor in the code until the scale displays the correct weight. Repeat this process for different weights to verify the accuracy of the scale.

Step 5: Enclosure

Finally, you can choose to enclose the components in a case or enclosure to protect them and give your digital scale a more polished look. Consider using a 3D printer to create a custom enclosure or repurpose a project box to house the components.

Building your own digital scale using Arduino is a fun and rewarding project that can teach you valuable skills in electronics, programming, and prototyping. With this step-by-step guide, you can create a custom-built scale that is accurate, customizable, and tailored to your specific needs. So grab your Arduino and start building your digital scale today!

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