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The HX711 24 Bit Load Cell Module – Dual-Channel Weight & Pressure Sensor Board is a high-precision A/D converter designed for weight scales and industrial control applications. Featuring a dual-channel differential input and a 24-bit resolution ADC, this module is ideal for interfacing with load cells and strain gauges to obtain accurate weight and pressure measurements in microcontroller-based systems.
This compact module integrates a low-noise programmable gain amplifier (PGA) with selectable gains of 32, 64, and 128. It eliminates the need for an external oscillator, thanks to the on-chip oscillator, and is simple to connect using just two digital GPIO pins (Clock and Data). Whether you’re building a DIY digital scale or working on a presence detection system, the HX711 ensures stable, high-resolution output.
🔧 Key Features
- 24-bit Precision ADC – Accurate measurement of load cell signals
- Dual Differential Channels – Supports two separate sensor inputs
- On-Chip PGA – Programmable gain of 32, 64, and 128 for flexible input ranges
- Two-Wire Interface – Uses only Clock and Data pins for communication
- Integrated Oscillator – No external crystal required (optional support for external)
- Low Power Operation – Ideal for embedded and battery-powered applications
📐 Technical Specifications
| Module Name | HX711 Load Cell Amplifier |
| ADC Resolution | 24 bits |
| Channels | 2 Selectable Differential Inputs |
| Output Sensitivity | 1.0 ± 0.1 mV/V |
| PGA Gain | 32 / 64 / 128 |
| Communication | Two-Wire (Clock, Data) |
| Oscillator | Built-in, supports optional external crystal |
| Power Supply | 2.6V – 5.5V DC |
| Output Type | Digital Serial Output |
| Board Size | Approx. 20mm × 17mm |
📌 Applications
- Digital Weighing Scales – Accurate weight measurement using load cells
- Pressure Monitoring – Monitor and log pressure changes in sensitive systems
- IoT Weighing Systems – Data logging and remote monitoring with MCUs
- Robotics & Automation – Load detection in mechanical systems
- Presence Detection – Detect objects or humans by pressure sensors
💡 Why Choose the HX711?
The HX711 Load Cell Module offers a complete and compact solution for converting analog weight sensor data into precise digital signals. With dual channels, 24-bit resolution, and high input flexibility, it is the go-to component for DIY and professional load sensing projects.
📦 Package Includes
- 1 × HX711 24-Bit Load Cell Amplifier Module
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