ET-S67
HX711 Load Cell Amplifier
24-bit amplifier for scales and force sensors
AED 39.00
Out of stockOverview
24-bit amplifier for scales and force sensors
The ET-S67 is built around the Avia HX711 — 24-bit, gain 128/64 (ch A), 10 or 80 SPS. It talks over 2-wire serial (DOUT/SCK) — any GPIO, not I2C.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Kitchen and parcel scales
- Beehive and plant-pot weighing
- Force and strain tests
Key features
What makes it different
ADC
Avia HX711: 24-bit, gain 128/64 (ch A), 10 or 80 SPS
Bridge
Excitation = VIN (ratiometric), 4-wire load cells / 4×half-bridge scales
Interface
2-wire serial (DOUT/SCK) — any GPIO, not I2C
Libraries
bogde/HX711, olkal HX711_ADC, ESPHome hx711
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| ADC | Avia HX711: 24-bit, gain 128/64 (ch A), 10 or 80 SPS |
|---|---|
| Bridge | Excitation = VIN (ratiometric), 4-wire load cells / 4×half-bridge scales |
| Interface | 2-wire serial (DOUT/SCK) — any GPIO, not I2C |
| Size | 25.4 × 20.3 mm |
|---|---|
| Mounting | 2 mounting holes (M2.5) |
| Connectors | 4-pin 2.54 mm header · Screw terminal 2P 5.0mm 17A (THT) — Excitation E+ / E− · Screw terminal 2P 5.0mm 17A (THT) — Signal A− / A+ |
| Main IC | HX711 (LCSC C6705483) |
| Revision | Rev A |
| Libraries | bogde/HX711, olkal HX711_ADC, ESPHome hx711 |
|---|
| JP1 (default 10Hz) | 3-way: 1-C = GND (10Hz, 50/60Hz rejection), 2-C = VIN (80Hz) |
|---|
Performance
Speed
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 2.7–5.5V (also bridge excitation) |
| 2 | GND | Ground | Ground |
| 3 | DOUT | SPI | Data out |
| 4 | SCK | SPI | Clock / power-down |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-S67 HX711 Load Cell Amplifier (assembled)
- 1 × 4-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, GND, DOUT, SCK
- Libraries: bogde/HX711, olkal HX711_ADC, ESPHome
hx711
Compare
Which load-cell amplifier?
| HX711 Load Cell Amplifier (this board)This board | ET-S09 NAU7802 24-bit Load-Cell ADC | |
|---|---|---|
| What it does | 24-bit amplifier for scales and force sensors | 24-bit bridge ADC for load cells and scales |
| Interface | 2-wire serial (DOUT/SCK) — any GPIO, not I²C | I²C, fixed 0x2A |
| Best for | Kitchen and parcel scales | Digital kitchen and parcel scales |
| Price | 39 AED | 19 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.