HX711 Load Cell Amplifier

24-bit load-cell amplifier for weighing scale projects.

Weight Sensor InterfaceRM4-RM15Intermediate

Arduino ✓ESP32 ✓Raspberry Pi ✓

Use HX711 in my FYP View related FYP titles

HX711 Load Cell Amplifier electronics module illustration

AI Ready Overview

Quick Summary

HX711 is a weight sensor interface commonly used in FYP and embedded projects. It is best for weighing scale and smart bin weight, with wiring and testing planned around Arduino, ESP32, Raspberry Pi.

Difficulty

Intermediate

Time Required

1-2 weeks for wiring, basic code, platform integration and repeated test readings

Cost

RM4-RM15 module range in Malaysia; full project cost depends on scope.

Components

HX711, Arduino, ESP32, Raspberry Pi

Overview

What is HX711?

HX711 amplifies load-cell signals for digital reading by Arduino or ESP32. It is common in smart weighing, inventory and bin-weight projects.

Engineering Reference

Quick Specs

Operating Voltage	3.3V / 5V
Interface	Digital serial
Difficulty	Intermediate
Typical Malaysia Price	RM4-RM15
Best For	Weighing scale, Smart bin weight

Real Usage Notes

Suitable / Not Suitable

Suitable for

✓ Weighing scale
✓ Smart bin weight
✓ Inventory measurement

Not suitable for

✕ No calibration projects
✕ Fast dynamic force measurement
✕ Wrong load cell wiring

Build Planning

Difficulty

HX711 is rated Intermediate. Plan around 1-2 weeks for wiring, basic code, platform integration and repeated test readingsdepending on wiring, libraries, calibration, dashboard/app integration and testing evidence.

Build Planning

Time Required

1-2 weeks for wiring, basic code, platform integration and repeated test readings

Malaysia Price Guidance

Cost

Typical module price range: RM4-RM15. This is component guidance only; a complete FYP cost depends on controller, sensors, casing, display, app/dashboard, documentation and timeline.

Connections

Connection overview

Module revisions can use different connector names and electrical limits. Treat this as a planning overview and verify the exact board marking, manufacturer datasheet and seller documentation before wiring.

Power

Use only a supply supported by the exact board or module variant. Common listings for this part mention 3.3V or 5V.

Ground

Connect a common ground between the controller, module and any external supply.

Primary interface

Plan for Digital serial; confirm the exact terminal names in the manufacturer documentation.

Variant-specific connections

Connector names and optional pins can differ between breakout-board revisions.

Platform Notes

Wiring Guides

HX711 with Arduino / ESP32

This is a planning overview, not a board-specific pin map. Confirm the exact module revision, supply limits and Digital serial terminals in its datasheet before wiring. Use suitable level shifting when logic voltages differ.

Power	Confirm against the exact board; listed variants commonly use 3.3V / 5V
Ground	Common ground with the controller
Interface	Digital serial (exact pins vary by module)

Fix Common Problems