Gravity: Arduino Digital Weight Sensor

A digital weight sensor kit based on the HX711 24-bit ADC, capable of measuring up to 1 kg. The HX711 is designed specifically for weight scale applications, interfacing directly with a bridge sensor to deliver precise, reliable measurements via the Gravity interface.

The kit includes both the HX711 weight sensor module and a 1 kg load cell, making it easy to build a digital scale for home, laboratory, or industrial use with Arduino and other microcontrollers.

Key Features

• HX711 24-Bit ADC – High-precision analog-to-digital converter for weight scales
• 1 kg Range – Suitable for small-scale weighing applications
• Selectable Gain – PGA with 32, 64, and 128 gain settings
• Selectable Data Rate – 10 SPS or 80 SPS output
• Wide Supply Voltage – 2.6–5.5V
• Low Current – Less than 1.6 mA
• Gravity Interface – Simple plug-and-play connection

Weight Sensor Specifications

• Range – 1 kg
• Excitation Voltage – 5–15V
• Output Sensitivity – 1.0 ±0.15 mV/V
• Input Impedance – 1055 ±15 Ω
• Output Impedance – 1000 ±5 Ω
• Overload Capability – 200% F.S.
• Module Size – 33 × 38 mm

Wiring

• Red – E+
• Black – E-
• White – S-
• Green – S+

Package Contents

• 1× Weight Sensor Module (HX711)
• 1× Weight Sensor (1 kg load cell)
• 2× Sensor Cables

Resources

• Product Wiki
• HX711 Datasheet (PDF)
• Schematic (PDF)
• Arduino Library (ZIP)
• 3D Printed Module Design Files