HX711 Load Cell Amplifier Module (24-bit ADC)
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Prices updated: 13 Oct 2026
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About this product
The HX711 load cell amplifier board uses a 24-bit ADC with a low-noise programmable gain amplifier to read strain-gauge bridge sensors. It converts the small load cell signal into digital data for Arduino or other microcontrollers. It is used in weighing scales and force measurement projects and has two differential inputs, A and B.
Specifications
- ADC resolution
- 24-bit
- Input channels
- Channel A and Channel B (differential)
- Programmable gain
- 128 and 64 on channel A, 32 on channel B
- Interface
- Two-wire serial (DOUT, SCK)
- Supply voltage
- 2.6 V to 5.5 V
Frequently asked questions
How do I wire a load cell to the HX711?
A standard four-wire load cell connects to E+, E-, A- and A+ on the module. Connect DT (data) and SCK (clock) to two microcontroller pins, then power the module with VCC and GND. Wire colors vary by load cell, so check its datasheet.
Can the HX711 run on a 3.3 V microcontroller?
The HX711 supports 2.6 V to 5.5 V, so it can be powered from a 3.3 V supply. Make sure the DT and SCK signals match the logic level of your microcontroller, and calibrate the readings with a known weight before using them.
