Load cell is a metal bar that gets stretched when weight is put on top. Instead i am going to flog my two scales and buy a complete 3axis dro off ebay from a chinese seller, for slightly more than i paid for the scales. It supports the architectures atmelavr, espressif8266, espressif32, atmelsam, teensy and ststm32 by corresponding platformio targets. I figured the load cell inside was still good, and would be fun to hack. Digital scales best digital scales online shopping. I am officially abandoning this project, but will leave my notes here in case they are useful to someone. D4, d5, d6 and d7 pins are respectively managed by 3, 5, 6 and 7 digital pins of the arduino uno. I found a dead scale at work, the electronics were fried.
You can make a relation ship between amount of stretch and resistance change. Arduinos hardware are based on open source platform and using like c or java development environment to make the development process simple and easy to understand. When the metal gets stretched it changes its electrical resistance. For example, capacitive sensing takes difficult timing and pulsing of digital pins. Rs is managed by pin 8 and the enable pin from pin a0 this configuration will also be specified in the software. Balanza electronica digitalbalanza digital perubalanza. This document explains the functioning of the pins in those modes. Because the output of the module is already in the form of gram hx711, this causes fairly mild arduino workload. The opensource arduino software ide makes it easy to write code and upload it to the board. While the title of this document refers to digital pins, it is important to note that vast majority of arduino atmega analog pins, may be configured, and used, in exactly the same manner as digital pins. I stripped out the load cell, and connected it to an arduino with a hx711 amplifier 24 bit adc. Arduino users have written lots of exciting addons for arduino. The environment is written in java and based on processing and other opensource software.
The display is connected to the arduino by asynchronous serial interface 57600 allowing a satisfactory fast data refresh. Dzc11 lcd display digital scale double range pocket scales 100g 0. We can write the code from scratch, or we can stand on the shoulders of great people. An arduino library to interface the avia semiconductor hx711 24bit analogtodigital converter adc for reading load cells weight scales. Want to be notified of new releases in sparkfunhx711loadcellamplifier. Arduinobased digital scale with hx711 and vfd display. If nothing happens, download github desktop and try again. In this project we will be interfacing hx711 load cell amplifier with arduino and 162 lcd for designing arduino weighing machine using load cell hx711. The arduino as a data processor will read the data output of the module hx711. March 2015 updated january 2016 update january 2016. Construye tu propio robot con arduino sin programar. This is a simple precision scale project that employs a cool vfd display.
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