HX711 Load Cell Amplifier
24-bit ADC front-end for strain-gauge load cells and weigh scales. DT/DOUT and SCK are MCU-facing pins; E+/E-/A+/A- connect to the load cell bridge.
24-bit ADC front-end for strain-gauge load cells and weigh scales. DT/DOUT and SCK are MCU-facing pins; E+/E-/A+/A- connect to the load cell bridge.
Logic and analog supply. Many breakout boards work from 2.6V-5.5V; use 3.3V logic with ESP32/Pico.
Common ground
Data output from HX711 to MCU input; also called DOUT.
Serial clock input from MCU.
Bridge excitation positive output to load cell.
Bridge excitation negative output to load cell.
Differential bridge input positive.
Differential bridge input negative.
| Pin | Type | Function | Voltage |
|---|---|---|---|
| VCC | Power | Logic and analog supply. Many breakout boards work from 2.6V-5.5V; use 3.3V logic with ESP32/Pico. | 3.3 |
| GND | Ground | Common ground | |
| DT | GPIO | Data output from HX711 to MCU input; also called DOUT. | |
| SCK | SPI | Serial clock input from MCU. | |
| E+ | Power | Bridge excitation positive output to load cell. | 3.3 |
| E- | Ground | Bridge excitation negative output to load cell. | |
| A+ | Analog | Differential bridge input positive. | |
| A- | Analog | Differential bridge input negative. |
Logic and analog supply. Many breakout boards work from 2.6V-5.5V; use 3.3V logic with ESP32/Pico.
Common ground
Data output from HX711 to MCU input; also called DOUT.
Serial clock input from MCU.
Bridge excitation positive output to load cell.
Bridge excitation negative output to load cell.
Differential bridge input positive.
Differential bridge input negative.
Analog · I2C · 3.3 – 5 V · Bare
Verify supply voltage and logic levels before powering up.
Module pins: VCC, E+, GND, E-, SCK, A+, A-. Schematik maps them to your board in the app.
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