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Weight Sensor Kit 1KG - Load Cell Amplifier HX711

Weight Sensor Kit 1KG - Load Cell Amplifier HX711

The 1KG Load Cell Weight Sensor Kit is designed for high-precision weight measurements. It includes a 1kg load cell and an HX711 ADC amplifier module. The load cell is a transducer that converts pressure or force into an electrical signal, while the HX711 amplifier accurately reads and amplifies the signal using a 24-bit ADC. Ideal for kitchen scales, luggage weighing devices, and various embedded or industrial applications.

Package Includes:

  • 1 x 1Kg Load Cell
  • 1 x HX711 Amplifier Module

35.00 AED 35.00 AED Tax Included
35.00 AED Tax Included

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Weight Sensor Kit
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Features:

  • High-Precision Measurement: Uses a 24-bit ADC for accurate weight readings.
  • Adjustable Gain: Programmable gain amplifier with gain options of 32, 64, and 128.
  • Dual Input Channels: Supports two analog differential input channels.
  • Bridge Voltage Support: Can be configured for use with Wheatstone bridges.
  • Low Noise: On-chip active low-noise PGA with selectable gain.
  • Digital Output: Simple serial interface for easy integration with microcontrollers.
  • Power Efficient: Internal regulator for ADC and load cell analog supply.
  • Supply Rejection: Handles both 50Hz and 60Hz power supply interference.

Load Cell with HX711 Amplifier Module

Specifications:

Load Cell:

  • Rated Load: 1Kg
  • Rated Output: 1.0 mV/V ± 0.15 mV/V
  • Zero Output: ± 0.1 mV/V
  • Creep: 0.03% F.S / 30 minutes
  • Recommended Operating Voltage: 3V – 12V DC
  • Max Operating Voltage: 15V DC
  • Input Impedance: 1115 ± 10% Ω
  • Output Impedance: 1000 ± 10% Ω

HX711 Amplifier Module:

  • Operating Voltage: 2.7V – 5V
  • Operating Current: <1.5mA
  • Sample Rate: 10Hz
  • Size: 16mm x 24mm
  • Channels: 2 differential inputs

Applications:

  • Kitchen weighing scales
  • Luggage and parcel scales
  • Industrial material weighing
  • Agriculture: weighing feed, livestock, etc.
  • Robotics: grippers with weight sensing
  • Medical devices: patient or infant weighing
  • Fitness equipment
  • Shipping and logistics systems

Pin Connections:

Load Cell:

Wire Color Connection
Red E+ (Excitation +)
Black E- (Excitation -)
Green A+ (Signal +)
White A- (Signal -)

HX711 Module:

HX711 Pinout Diagram

 

Sample Project:

Circuit Diagram:

HX711 Circuit Example

Library:

HX711 Arduino library by Bogde: GitHub - HX711 Library

How to install Arduino libraries: Arduino Library Guide

Example Code - Calibration:


#include "HX711.h"

#define LOADCELL_DOUT_PIN 3
#define LOADCELL_SCK_PIN 2

HX711 scale;
float calibration_factor = -7050;

void setup() {
  Serial.begin(9600);
  Serial.println("HX711 calibration sketch");
  Serial.println("Remove all weight from scale");
  Serial.println("After readings begin, place known weight on scale");
  Serial.println("Press + or a to increase calibration factor");
  Serial.println("Press - or z to decrease calibration factor");

  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");
  Serial.print(" 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;
  }
}

References: