HX711 Balance Sensor3. Communicating with the Balance Module requires a driver for the HX711 sensor. After that, we need to find an object with known weight. 2 years ago 4 weeks ago, I was interfacing this module with raspberry pi. 10 months ago, In fact, to make it even easier for others (and myself, should I need it again), I'll just paste in the code contained HX711.rar right here: /* Setup your scale and start the sketch WITHOUT a weight on the scale Once readings are displayed place the weight on the scale Press +/- or a/z to adjust the calibration_factor until the output readings match the known weight Arduino pin 6 -> HX711 CLK Arduino pin 5 -> HX711 DOUT Arduino pin 5V -> HX711 VCC Arduino pin GND -> HX711 GND*/#include "HX711.h"HX711 scale(5, 6);float calibration_factor = 20; // this calibration factor is adjusted according to my load cellfloat units;float ounces;void setup() { Serial.begin(9600); Serial.println("HX711 calibration sketch"); Serial.println("Remove all weight from scale"); Serial.println("After readings begin, place known weight on scale"); Serial.println("Press + or a to increase calibration factor"); Serial.println("Press - or z to decrease calibration factor"); scale.set_scale(); scale.tare(); //Reset the scale to 0 long zero_factor = scale.read_average(); //Get a baseline reading Serial.print("Zero factor: "); //This can be used to remove the need to tare the scale. By connecting the amplifier to your microcontroller you will be able to read the changes in the resistance of the load cell, and with some calibration, you’ll be able to get very accurate weight measurements. 4. The input circuit can be configured to provide a bridge voltage electrical bridge (such as pressure, load) sensor model is an ideal high-precision, low-cost sampling front-end module. Four wire load cell connection Utilcell Four wire load cell connection UTILCELL, s.r.o. Don't write about products or I will start making this project from tomorrow. 1 year ago, https://www.allaboutcircuits.com/projects/how-to-build-weighing-scale-wheatstone-bridge-strain-gauge-microcontroller/, Question Nonetheless, this module is commonly being used to measure weight. Do someone know a code to put the hx711 to an graph bar with neopixels ? The four wires coming out from the wheatstone bridge on the load cell are usually : Then, connect your Arduino Uno Board to your Computer via USB. After put the known weight, on the serial monitor we will see the weight readings values, this value are without scale. The load cell is connected with the HX711 Load cell Amplifier using four wires. Luckily I found this free online RAR extractor web page/service: https://www.ezyzip.com/open-extract-rar-file-online.html...that did the job for me. Based in Barcelona and founded in October 2012, Industrial Shields is the brand under the company Boot and Work Corp S.L. You probably don't care about this anymore, but the load cell could be the wrong way around.I just had this issue and was messing around with the calibration factor for an hour before realizing it was the other way around. So if this is correct one Red wire would go to the A+, and the other to the A-, (of the Hx711 board). We chose the red and black wire pair to be the power wires of the load cell. Load cell is a transductor that generate an electrical signal directly proportional to the measured force. This module uses 24 high-precision A / D converter. 10 months ago To create a full bridge you want to connect at least two of these load cell parts to form a 4-wire connection: simulate this circuit. This can be used for single shot reads, or repetitive reads. EthernetPLC Favorited Favorite 3. In this example is used the HX711 that is very used in industrial applications. This video shows how to interface HX711 Balance Module with Load Cell. These four wires are Red, Black, White, and Green/Blue. A Positive Input) of HX711. Once the HX711 library is installed, we can proceed to calibrate the weighing scales. We are a company with the aim to become the biggest e-commerce of industrial automation electronic devices based on Open Source Hardware electronics. on Step 5, Sir I need hx711 adc converter weighing load cell with 8051 ,I need both assembly ,c language code hole program ,because I m beginner so please, Answer You have to calibrate only once for each load cell. We did not use the correct calibration factor. The red wire of the Strain gauge or Load cell should be connected with the E+ pin of the HX711 break out board. Do you have a specific reason for connecting the white and green wire of the load cell the way you did? The HX711 load cell amplifier has two input channels, and the bridge can be straightaway connected to the S+, S-, E+, and E- pins of the module by using only one channel. The DT pin is connected to the Arduino Pin 4, SCK is attached to pin 5. I was playing with my cables, and I noticed that if I link the 3v pin of nodemcu, to the E+ pin on the HX711, suddenly the load cells … The load cells the scale came with have three terminals and are connected in a bridge. On market there are different transmitters that can convert this analog signal to digital. Refer the image above for your references. On HX711 board you will find E+, E-, A+, A- and B+, B- connections. You can choose other pins if you want. The Grove - ADC for Load Cell (HX711) is a 24-bit A/D converter designed specifically for the load cell. The output can be monitored on the Serial monitor of Arduino IDE. 2 years ago. Useful in permanent scale projects. The four wires of the Load cell or Strain Gauge are connected with the HX711. Download the ZIP file below > Open Zip File > Extract to your Arduino Uno Library folder. Hi, and welcome to the forum. Thx. Note: VCC is the analog voltage to power the load cell. I'll brief you in couple of days. 1. Load cell comes in various weights depending on your application select the load cell weight specification, In this tutorial I have used 40Kg, Precision Grade C2 load cell. Connect the GND of the HX711 module to the Arduino GND and VCC to the Arduino 5V pin. ... Interfacing Load cell(5KG) & HX711 with Raspberry PI 3 V2. You are at the right page :) This is 1kg load cell that comes with HX711 amplifier board. Question 1 year ago I used a 16X2 I2C LCD Display to minimize the connection. Have tried different pins, etc and am still having no luck. Have you found an answer to this problem? In this project we will be “interfacing HX711 Load cell amplifier with Arduino” and 16*2 LCD for designing Arduino Weighing Machine using Load Cell HX711. 1 year ago, thanks in advance for somebody regarding helping me.i am using 10kg straight bar type simple load cell..... help me in full detail how to calibrate that. The Load Cell Amplifier is a small breakout board for the HX711 IC that allows you to easily read load cells to measure weight. Navigate using the tag cloud or search using specific criteria, How to connect and configure a load cell using HX711 transmitter with Arduino based PLCs, Arduino based PLC Controller for Industrial Applications by Industrial Shields. The remaining pins, B- and B+, can be used if a second load cell has to be connected to the HX711 module. I have used a push-button tact switch to reset the weight to zero. In this tutorial, you will need :1. To connect the HX711 to the Arduino you only need 2 pins (Clock and Data). Reply The next step is to upload the next sketch to our PLC: The program has to run without the known weight, because when the program begin to calculate de tare. The connection between Load Cell & HX711 has been explained above. It is better if the known weight is closer with the maximum value of the working range of our load cell. VDD is the digital supply voltage used to set the logic level. The simplest way to install the driver is to download the HX711 library. It contains an on-chip low noise programmable … on Step 3. Question Its power consumption is 1.5 milliamperes. Qwiic Scale Hookup Guide April 11, 2019. You will find multiple applications, solutions, code examples. As you can see in the connections diagram. 11 months ago. In this example is used the HX711 that is very used in industrial applications. This is just a few dozen lines of code, so I don't understand why it would need to be compressed. After open the serial monitor and wait for restart the tare, we can put the known weight. With an average of these values we can calculate the value of the scale, following that formula: Once the scale value has been calculated we have all the requirements to configure the load cell. The four cables of the Load Cell must be connected to the weight sensor. Connect the red wire to the E+ and the black wire to the E- output of the HX711 module. NOTE : This tutorial only show you on how to interface HX711 with load cell. Grove – ADC for Load Cell (HX711) The HX711 is a precision 24-bit analog-to-digital converter (ADC) that is designed for weighing scales and industrial control applications to interface directly with a bridge sensor. Now, you can set your own calibration factor by adjusting the value using the '+' or 'a' to increase the value OR '-' or 'z' to decrease the value. Did you connect one or two load cell to the HX711, and how (post a picture). A+ and A- are the measurement inputs from the cells. Load Cell (can be any weight of load cell ie 20KG, 60KG or 100KG). If three load cells are needed then you could put on load cell on each HX711 or two load cells on one HX711 and the last load cell on the A channel of a second HX711. hello.. i have difficulties with my loadcell from step 9 .. i dont actually understand how the software part functions... when i run the code i get "0.00g" on the serial monitor and the value does not changes no matter the load i use on the loadcell.... Answer HX711 Basic wiring Minimum connection of the HX711 to the Arduino UNO. Easy and peasy! 5 months ago We just have to write the scale value on the HX711 function set_scale(). The HX711 is an inexpensive 24bit ADC with programmable 128x, 64x, and 32x gain. Create your own digital scale quickly and easily using the Qwiic Scale! Remember that each load cell with different weight ie. The second one MUST switch from 0V to about 4V depending of power_down and power_up. If you want the four load cells to measure separate loads, use two HX711, or alternatively a 4-input ADC like the ADS1234. The module can be operated with voltages between 2.6 and 5.5 volts. Anyone can help ? Below the connection details and diagram: RED Wire is connected to E+; BLACK Wire is connected to E-WHITE Wire is connected to A- The main component of this project is a Load cell and HX711 load cell amplifier module.As you can see, one side is marked with ten kilograms. 2 years ago, Reply Connect the middle wires (red) of the load cells to the A+ and A- inputs of the HX711 module. Also, what do the notations "(S+)+" and "(S-)+" mean? The polarity doesn't matter. 5 months ago. We will be using a simple Arduino library to communicate with the HX711 that provides a calibration and Tare (reset) feature to easily determine the weight of an object. Typo/copy-paste error? I have a 100kg load cell , on each of the wires i get 30Ohms , Connected to a HX711 , i'm pretty sure my wiring is OK (i tried switching it every possible way) Tried it on a Mega and a Yun, but i get no increase in readings when i apply pressure on the cell. Load cell wires hooked up to the HX711 Amplifier board Once the load cell is is hooked up to the amplifier, you can hook up VDD, VCC, DAT, CLK, and GND to a microcontroller such as a RedBoard or Arduino board. when the serial monitor give u a value for reading, it means that u has succesfully interface your load cell. Step 2: Wire the Load Cells and HX711. There may be a slight variation in the colors of wires from module to module. All you need to do is connect the wires to the HX711 … First between GND and VCC + VDD ( 5V ) and between RED and BLACK. If this happens, you're sure that at least the Arduino communicates with the HX711. A Negative Input) of HX711, and the green wire "Output- (O-), Signal- (S-)+ or Amplifier- (A-)" is connected to pin 4 (A+) in J1, which goes to pin 8 (INPA, Ch. Load cell is a transductor that generate an electrical signal directly proportional to the measured force. Next is showed an example of how can look a final program for a load cell: Explain the benefits you offer. E+ and E- are the sensor power outputs of the HX711 module. One thing though: I was slowed down by the use of the .rar compressed file for the example code. on Step 9, I’m soldering my hx711 to the load cell and checking continuity between a- and a+ and e- and e+. On aluminum load cells, multiple strain gauges are already wired together to for a Wheatstone bridge. Reply More information is needed. Basically to find the value of the scale, that is to find the conversion factor to convert the read value to weight unit. Am I wrong that I should have continuity, Question 36mm x 21mm x 4mm / 1.42" x 0.83" x 0.16", 3. Used 3D printed base frame and Top plate for Load cell. The brain of the project is as always the arduino, you can use any Arduino board model. Most Load cell have four wires red, black, green and white. This module provides access to an HX711 load cell amplifier/ADC. On market there are different transmitters that can convert this analog signal to digital. Sometimes I am getting the wrong value(getting value without load and value is continuously changing).Anyone having tips for this problem please help me.Thanks in advance. I used the same code as above here, same results. The connection is as follows: on Introduction, Question Open Serial Monitor and it will show u as shown in the picture above. You have to set your own calibration factor for your load cell. Interfacing Load cell(5KG) & HX711 with Raspberry PI 3 V2. The load cell has four wires, which must be connected to the first four pins of the HX711 module: Red wire to E+, black wire to E-, white wire to A-, and green wire to A+. After the main purpose is reached, we will compare the output between myRIO and arduino. Next easiest would be to make the uncompressed Arduino .ino file itself available for download (<2KB). Thanks for the instructable - it has helped me get going quickly with my project using the HX711. See the wiring diagram for how to connect the load cells, HX711, and Arduino. ArduinoPLC If you have a voltmeter, you could measure the voltages on the HX711 board. Answer 7 months ago. Download the sample source code below, open and upload this sample source code into your Arduino IDE. The green HX711, however, has six connections, of which we only need four for the cables. Question It can translate up to 1kg of pressure (force) into an electrical signal. HARDWARE OVERVIEW HX711 myRIO Load Cell 20kg Arduino Uno Virtual Bench Connection Diagram SOFTWARE Labview with FPGA module This software is used to program … © 2020 Industrial Shields - All Rights Reserved | Raspberry Pi is a trademark of the Raspberry Pi Foundation, Course - Programming Arduino on Industrial Environments, Browse our Blog. The HX711 is a 24 bit analog to digital converter “ADC”. This would support two load cells. Simply inserting the text so someone could copy and paste would be easiest. Arduino Weighing Machine Working. Did you make this project? The project consists of Arduino, Load cell and HX711 load cell amplifier board and a computer. Connect the DT & SCK Pins of Load Cell to ESP8266 D5 & D6 Pins respectively. 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