In this video, I explain how to connect a four-wire load cell to the HX711 amplifier module and how to read the weight value with an Arduino.
Diagrams and pictures:
https://circuitjournal.com/four-wire-load-cell-with-HX711
Github page of the "HX711_ADC" library:
https://github.com/olkal/HX711_ADC
3D printed parts:
https://www.thingiverse.com/thing:4602226
Buy from Amazon:
Crimping tool (I am using this one): https://amzn.to/3jaDwci
DuPont connector set: https://amzn.to/3rCPT8e
Load Cell with HX711: https://amzn.to/2zwTcG1
Genuine Arduino Uno: https://amzn.to/2ZXfdsr
Male to male jumper wires: https://amzn.to/2TX0GZP
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Buy from Aliexpress:
Crimping Tool: https://s.click.aliexpress.com/e/_dVTkVNc
DuPont Connector Set: https://s.click.aliexpress.com/e/_dUQew9o
Load Cell with HX711 Module: https://s.click.aliexpress.com/e/_9GL349
Arduino Uno Compatible Board: https://s.click.aliexpress.com/e/_AVaoKb
Set of Jumper Wires: http://s.click.aliexpress.com/e/cnhvUw2c
Disclosure: Bear in mind that some of the links in this post are affiliate links and if you go through them to make a purchase I will earn a commission. Keep in mind that I link these companies and their products because of their quality and not because of the commission I receive from your purchases. The decision is yours, and whether or not you decide to buy something is completely up to you.
Timecodes:
00:00 Intro
00:20 Demo
00:45 Different load cells
01:44 How does the load cell work?
02:39 The HX11 amplifier module
02:50 Assembly
05:03 Verifying the wires
06:16 Connecting the load cell to the amplifier module
06:50 Connecting the HX711 module to Arduino
07:19 Downloading the HX711_ADC Library
07:42 Arduino code
08:14 Calibrating the load cell
09:35 Testing the load cell with various objects
10:15 End
Music from Youtube audio library.