HX711 Strain Gauge Amplifier for Arduino, Raspberry Pi, and ESP32

HX711 Strain Gauge Amplifier for Arduino, ESP8266, ESP32, and Raspberry Pi

A two-channel strain gauge amplifier module based on the precision 24-bit HX711 chip. It was designed specifically to work with strain gauge beams, making it an excellent choice for any project requiring accurate weight measurements. For proper operation, the module requires an external strain gauge sensor.

Key Technical Features

The module offers high accuracy thanks to the use of 24-bit converters and a built-in, low-noise preamplifier with selectable gain (32, 64, 128). It features a built-in voltage regulator and does not require an external oscillator. Control is via a simple serial interface that does not require complex system programming.

Specifications

• Supply voltage: 2.6–5.5 V
• Number of input channels: 2
• Converters: 24-bit
• Built-in voltage regulator
• Built-in low-noise preamplifier with selectable gain: 32, 64, 128
• No external oscillator required
• Refresh rate: 80 Hz
• Simple digital control via a serial interface
• Dimensions: 34 x 20 x 2 mm

Example Applications

• Building your own high-precision electronic scales
• Automated dosing and weighing systems
• Smart beehives with a weight monitoring system
• IoT projects using microcontrollers
• Test stations for measuring tensile or compressive force

Benefits

• High measurement precision thanks to 24-bit signal processing
• Easy integration with popular microcontroller platforms
• Compact dimensions for easy installation in small projects
• Wide supply voltage range allowing operation with 3.3V and 5V circuits
• Ready for use without the need for additional external components