HX711 24-Bit Precision Load Cell Amplifier Module – Dual-Channel Weight Sensor ADC
Product Description
The HX711 24-Bit Precision Load Cell Amplifier Module is a high-precision analog-to-digital converter (ADC) breakout board designed for electronic weighing scales and weight measurement applications. It amplifies the small electrical signals generated by load cells and converts them into digital data that can be read by a microcontroller.
Based on the HX711 IC, this module features a 24-bit ADC, two selectable differential input channels, and an integrated programmable gain amplifier (PGA). It supports selectable gain settings of 32, 64, and 128, making it suitable for measuring small changes in load cell output.
The module uses a simple two-wire serial interface, making it easy to connect with Arduino, ESP32, and other compatible microcontrollers. It is widely used in digital weighing scales, smart weight measurement systems, industrial measurement prototypes, and DIY electronics projects.
Key Features
24-Bit ADC: High-resolution digital conversion for load cell signals.
Dual Differential Input Channels: Supports two selectable analog input channels.
Integrated Amplifier: Built-in low-noise programmable gain amplifier.
Selectable Gain: Supports gain settings of 32, 64, and 128.
Simple Two-Wire Interface: Uses DT (Data) and SCK (Clock) communication pins.
Selectable Output Rate: Supports 10 SPS and 80 SPS.
Power Supply Regulation: Integrated regulator for the load cell and analog circuitry.
Noise Rejection: Supports simultaneous 50 Hz and 60 Hz power-line interference rejection.
Microcontroller Compatible: Suitable for Arduino, ESP32, and other compatible development boards.
Easy Integration: No external operational amplifier is normally required for standard load cell interfacing.
Technical Specifications
Parameter | Specification |
Product Name | HX711 Load Cell Amplifier Module |
Main IC | HX711 |
ADC Resolution | 24 Bit |
Input Channels | 2 selectable differential channels |
Amplifier | Integrated Programmable Gain Amplifier |
Gain Settings | 32, 64, 128 |
Output Data Rate | 10 SPS / 80 SPS |
Communication Interface | Two-wire serial interface |
Data Pin | DT / DOUT |
Clock Pin | SCK |
Power-Line Rejection | 50 Hz / 60 Hz |
Internal Oscillator | Yes |
Applications | Electronic weighing scales and load cell measurement |
Applications
Digital weighing scales
Arduino weight measurement projects
ESP32-based smart weighing systems
Kitchen and postal weighing scales
Industrial load measurement prototypes
Force and pressure measurement experiments
Smart inventory and storage monitoring
DIY electronic balance projects
Educational electronics and STEM projects
How It Works
A load cell produces a very small differential voltage when weight or force is applied. The HX711 module amplifies this signal using its built-in programmable gain amplifier and converts it into a 24-bit digital value.
A microcontroller reads the digital output through the DT and SCK pins. With suitable calibration using known weights, the readings can be converted into weight measurements.
Package Includes
1 × HX711 24-Bit Precision Dual-Channel Load Cell Amplifier Module
Important Notes
The HX711 is an ADC and amplifier module; a compatible load cell is required separately for weight measurement.
Although the IC has two selectable differential input channels, typical weighing-scale projects commonly use Channel A.
The 24-bit resolution describes the ADC output format; actual measurement precision depends on the load cell, noise, wiring, calibration, and mechanical setup.
Select the appropriate gain and data rate for your application.
Check the breakout board's supply voltage and pin compatibility before connecting it to a microcontroller.
Stable mounting and proper load-cell calibration are important for reliable measurements.
