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Weight Sensor Load Cell 20Kg With HX711 AD Module

Weight Sensor Load Cell 20Kg With HX711 AD Module

This digital weight sensor module is ideal for a variety of applications, from kitchen scales to Arduino-based smart projects. It uses the high-precision 24-bit HX711 A/D converter chip, which includes a 128x programmable gain amplifier for accurate weight measurements. The module features easy digital control, built-in oscillator, and selectable data rates of 10SPS or 80SPS, making it a powerful and cost-effective solution.

Package Includes:

  • 1 x 20KG Load Cell Sensor
  • 1 x HX711 24-bit Precision ADC Module

30.45 AED 30.45 AED Tax Included
30.45 AED Tax Included

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Weight Sensor Kit
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Features:

  • Two selectable differential input channels
  • On-chip low noise PGA with selectable gain (32, 64, 128)
  • On-chip power supply regulator for load cell and ADC analog supply
  • Built-in oscillator (optional external crystal supported)
  • Power-on-reset and low power standby
  • No programming required – simple pin-driven control
  • Selectable output data rate: 10SPS or 80SPS
  • Simultaneous 50Hz and 60Hz rejection

Specifications:

  • HX711:
    • Operating Voltage: 2.7 - 5VDC
    • Differential Input Voltage: ±40mV
    • Data Accuracy: 24-bit
    • Refresh Frequency: 10Hz / 80Hz
    • Operating Current: < 1.5 mA
    • Standby Current: < 1 uA
    • Dimensions: 24 x 16mm
  • 20Kg Load Sensor:
    • Capacity: 10 - 20 Kg
    • Input/Output Resistance: 1000 ± 20 Ω
    • Insulation Resistance: ≥5000 MΩ
    • Excitation Voltage: ≤10V
    • Operating Temp: 0 – 50°C
    • Overload Capacity: 150% F.S
    • Dimensions: 80 x 12.7 x 12.7mm

Applications:

  • Kitchen scales
  • Industrial and postal weighing systems
  • Luggage weighing and DIY smart weight projects

Pin Connections:

Weight Sensor:

Wire Color Connection
Red E+
Black E-
Green A+
White A-

HX711 Module:

HX711 Module Pinout

Sample Project:

Circuit Diagram:

HX711 Circuit Diagram

Libraries:

Calibration Sketch:


#include "HX711.h"

#define LOADCELL_DOUT_PIN 3
#define LOADCELL_SCK_PIN 2

HX711 scale;
float calibration_factor = -7050; // Change as needed

void setup() {
  Serial.begin(9600);
  Serial.println("HX711 calibration sketch");
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale();
  scale.tare();
  long zero_factor = scale.read_average();
  Serial.print("Zero factor: ");
  Serial.println(zero_factor);
}

void loop() {
  scale.set_scale(calibration_factor);
  Serial.print("Reading: ");
  Serial.print(scale.get_units(), 1);
  Serial.print(" lbs    Calibration Factor: ");
  Serial.println(calibration_factor);

  if (Serial.available()) {
    char temp = Serial.read();
    if (temp == '+' || temp == 'a') calibration_factor += 10;
    else if (temp == '-' || temp == 'z') calibration_factor -= 10;
  }
}

Example Program:


#include "HX711.h"

#define calibration_factor -7050.0
#define LOADCELL_DOUT_PIN 3
#define LOADCELL_SCK_PIN 2

HX711 scale;

void setup() {
  Serial.begin(9600);
  Serial.println("HX711 scale demo");
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(calibration_factor);
  scale.tare();
}

void loop() {
  Serial.print("Reading: ");
  Serial.print(scale.get_units(), 1);
  Serial.println(" lbs");
}

 

References: