1KG Load Cell Weight Sensor with HX711 ADC Module
Precision Weighing for Arduino and DIY Projects
The 1kg load cell sensor is a straightbar strain gauge transducer, designed to measure force up to 1 kilogram (approx. 2.2 lbs). When paired with the HX711 24bit ADC module, it provides an ideal foundation for building portable electronic scales, 3D printer filament monitors, and other precision weighing projects .
UltraPrecise Measurement Achieves accuracy to 0.1 gram and detects minute weight changes.
Complete Sensing Solution - Converts mechanical force into a digital signal readable by Arduino, ESP32, or other microcontrollers.
A 1kg load cell generates a tiny analog voltage signal (in millivolts) proportional to the applied weight. This signal is too weak for a microcontroller to read directly.
The HX711 amplifier solves this by providing a highprecision 24bit analogtodigital conversion, simplifying the communication with your development board.
Technical Specifications
| Parameter | Load Cell | HX711 Module |
|---|
| Capacity | 1kg | - |
| Rated Output | 1.0 ± 0.1 mV/V | - |
| Accuracy | 0.1g | - |
| Excitation Voltage | 5-10V DC | 2.6V - 5.5V DC |
| Output Signal | mV/V (Differential) | Digital |
| Interface | - | 2-Wire (DT, SCK) |
| Dimensions | ~80 x 12.7 x 12.7mm | 16 x 24mm |
= Wiring and Connection Guide =
Correct wiring is crucial for stable and accurate readings. The standard color code for this sensor is [citation:5]:
- *Red*: E+ (Excitation Positive)
- *Black*: E- (Excitation Negative)
- *Green*: A+ (Signal Positive)
- *White*: A- (Signal Negative)
*Connection to HX711 Module:*
- Connect Red to E+ on the HX711
- Connect Black to E- on the HX711
- Connect Green to A+ on the HX711
- Connect White to A- on the HX711
*Connection to Microcontroller (e.g., Arduino):*
- VCC (HX711) to 5V (Arduino)
- GND (HX711) to GND (Arduino)
- DT (HX711) to Digital Pin (e.g., D3)
- SCK (HX711) to Digital Pin (e.g., D2)
The HX711 module uses a simple 2-wire interface (Data and Clock) for communication, which requires no programming of the chip itself [citation:11].
For best results, use a stable power source and keep the wiring away from sources of electrical noise.
Troubleshooting
Fluctuating readings:
- Ensure all connections are firm. Loose wires are a common cause of instability.
- Check the power supply for stability and noise.
No output or incorrect values:
- Verify the wiring matches the color code above (Red, Black, Green, White) [citation:5].
- If the code fails to compile, ensure you have installed a compatible HX711 library.
