HX711 Load Cell Amplifier Module – 24-bit Precision ADC for Weighing Sensors | Arduino & ESP32 Compatible

A high-precision HX711 Load Cell Amplifier Module designed for accurate weight and force measurement. Featuring a 24-bit analog-to-digital converter (ADC), this module can detect extremely small signal changes from load cells with excellent accuracy and stability.

Ideal for use with load cells and strain gauges, the HX711 converts analog signals into digital data that can be easily read by Arduino, Raspberry Pi, ESP32, and other microcontrollers.

Key features

• 24-bit high-resolution ADC for precise measurements
• Supports dual-channel input (A & B)
• Built-in programmable gain amplifier (PGA)
• 2-wire digital interface (DT, SCK)
• Low noise and high stability readings
• Compact module for prototyping and embedded systems

Pinout & wiring

Microcontroller connection

• VCC – Power supply (2.6V–5.5V)
• GND – Ground
• DT (DOUT) – Data output
• SCK (CLK) – Clock input

Load cell connection (left-side pins)

• E+ – Excitation positive (power to load cell)
• E- – Excitation negative (ground)
• A+ – Channel A signal positive
• A- – Channel A signal negative
• B+ – Channel B signal positive (optional)
• B- – Channel B signal negative (optional)

Note: Most applications use Channel A (A+ / A-) for a single load cell. Channel B is typically unused unless working with multiple sensors or specialised configurations.

Specifications

Common applications

• DIY digital weighing scales
• Smart kitchen and IoT weight systems
• Industrial force measurement
• Pressure and load monitoring
• Arduino and ESP32 sensor projects

Why use HX711? Standard microcontroller ADCs lack the precision needed for load cells. The HX711 provides high-resolution amplification and conversion, enabling accurate and stable measurements.

Note: This module is designed to work with load cells (sold separately). Calibration is required for accurate readings.