Weigh Objects with an Arduino Scale - Arduino Project Hub

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A000066 iso both

Arduino UNO & Genuino UNO

Necessary tools and machines

09507 01

Soldering iron (generic)

About this project

I found a dead scale at work, the electronics were fried. I figured the load cell inside was still good, and would be fun to hack. I stripped out the load cell, and connected it to an Arduino with a HX711 amplifier / 24 bit ADC.

Schematic

Output

Code

Load Cell SketchC/C++

Copy into Arduino IDE and upload to your Arduino. Don't forget to install library (see code line 4)

/* sample for digital weight scale of hx711
 * library design: Weihong Guan (@aguegu)
 * library host on
 *https://github.com/aguegu/ardulibs/tree/3cdb78f3727d9682f7fd22156604fc1e4edd75d1/hx711
 */
 // See original article and code / library link at http://arduinotronics.blogspot.com/2015/06/arduino-hx711-digital-scale.html

// Hx711.DOUT - pin #A2
// Hx711.SCK - pin #A3

#include <Hx711.h>
Hx711 scale(A2, A3);

void setup() {
  Serial.begin(9600);
}

void loop() {
  Serial.print(scale.getGram(), 1);
  Serial.println(" g");
  delay(200);
}

Schematics

Schematic

created with schemeit from digikey

Hx711%20schematic

Comments

Team Arduinotronics

Steve Spence

1 project
10 followers

Additional contributors

Library code by Weihong Guan

Published on

August 24, 2015

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