How to Build an Arduino Weight Sensor for Objects up to 100kg

Are you looking to build a weight sensor using an Arduino for objects up to 100kg? Well, you’re in luck! In this article, we will guide you through the process of creating your own weight sensor that can accurately measure the weight of objects up to 100kg.

Components needed:

– Arduino Uno
– Load cell (up to 100kg capacity)
– HX711 weight sensor amplifier
– Breadboard
– Jumper wires
– 10kg weight for calibration

Setting up the load cell:

The first step in building your weight sensor is to set up the load cell. Connect the load cell to the HX711 weight sensor amplifier using the recommended wiring diagram. Make sure to connect the load cell to the designated terminals on the HX711 amplifier.

Arduino setup:

Next, connect the HX711 weight sensor amplifier to the Arduino Uno. Connect the VCC pin on the HX711 to the 5V pin on the Arduino, the GND pin to the GND pin, the DT pin to digital pin 2, and the SCK pin to digital pin 3.


Calibration is essential to ensure accurate weight measurements. Start by uploading the following code to your Arduino:

#include “HX711.h”

#define DOUT 2
#define CLK 3

HX711 scale(DOUT, CLK);

void setup() {

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

With this code, you can measure the weight of the 10kg weight and make any necessary adjustments to ensure accurate readings.

Finalizing the setup:

Once you have successfully calibrated your weight sensor, you can start measuring the weight of objects up to 100kg. Place the object on the load cell and read the weight using the Serial Monitor in the Arduino IDE.

With this DIY weight sensor, you can accurately measure the weight of objects up to 100kg. Whether you are working on a project that requires precise weight measurements or simply want to experiment with Arduino, this weight sensor is a great tool to have in your arsenal. Happy building!

Leave a Comment