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 | Position | 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 | digital | Data output from HX711 to MCU input; also called DOUT. | ||
| SCK | digital | 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. |
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.
Interlink-style FSRs, strain-gauge load cells with HX711 amplifiers, and ready-made kits like DFRobot's Gravity I2C 1kg scale — from simple touch detection to accurate mass measurement.
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