DFRobot
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,...
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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
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- Impedance
- Impedance is the total opposition a component or circuit presents to alternating current, measured in ohms, combining resistance with frequency-dependent reactance. It appears in many contexts, such as matching a speaker's impedance (for example 4 ohm or 8 ohm) to an amplifier or the input and output impedance of signal circuits, and a correct match helps avoid weak signals, distortion or damage.
- SPS
- SPS means samples per second, the number of measurements an analogue-to-digital converter takes each second. A higher SPS gives faster updates, while on many converters a lower sample rate allows higher-resolution or lower-noise readings.
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Brands
Sensors & Input
Supplier page — dfrobot.com
Supplier Description · 509.4 KB · Click any page to view full size
SEN0160 digital weight sensor schematics V1.0
Schematic · 42.4 KB · Click any page to view full size
SEN0160 digital weight sensor datasheet V1.0
Datasheet · 160.4 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
