It's a low cost solution for precise amplification of measurements especially for robotics, multichannel systems, medical instrumentation, industrial process control and more. This digital data can be directly fed into microcontroller. I used a 16X2 I2C LCD Display to minimize the connection. Simply connect Load cell wires to the HX711 module based on their color, then connect DAT (Data) pin to Arduino Analog pin A1 and connect CLK (Clock) pin to Arduin0 Analog pin A0, Put Vcc and Gnd supply from Arduino power source pins. // Step 1: Upload this sketch to your arduino board // You need two loads of well know weight. Over the years, many RobotShop customers have asked us about the easiest way to interface a load cell with an Arduino board so they can get accurate weight measurements. © 2021 RobotShop inc. All Rights Reserved. With the help of Visuino the task is so easy that you can complete it in just couple of minutes.. // Arduino as load cell amplifier // by Christian Liljedahl // christian.liljedahl.dk // Load cells are linear. You can make certain by measuring the resistances between the wires and exciting on the pair with the greatest resistance, and sensing on the middle terminal. We recommend our Combinator Board to make it easy to turn the four strain gauges into a wheatstone bridge type load cell. Our chat is a buzzing-with-life place where our community members join to discuss and foster great conversations. Whether it's about their latest robotics project, questions about electronics, debates about the industry, or just talking between friends. *note* : for discussing any technical issues with your Load Cell Amplifier Shield, please proceed to our forum and create a new topic here. Thank you. !Connection to an Arduino + Base Board Uno. In this example A = 10 kg. It is not useful or relevant to the current topic. The voltage for the load cell is 9-12 v as i know the arduino has max input the 5v I thought one solution to put one voltage divider after the signal from the load cell before the arduino I am asking if someone has any ideas about the above thought. If you have some other microcontroller that runs on 3.3V, you can use 3.3V instead of 5V. This stackable shield can be used with various low output sensors like load cells. Here is the Fritzing diagram: Instruments like load cells provide small signal values and need to be amplified for processing, so without additional electronics, these sensors cannot and should not be connected directly to an Arduino's I/O pins. 2. Connect the GND of the HX711 module to the Arduino GND and VCC to the Arduino 5V pin. 3. 4. If you wish to use 3 or 4 load cells and need to stack two Wheatstone bridge amplifier shields, please see the following post: Arduino Tutorials - How to Stack Wheatstone Bridge Shields. If there is load on the load cell then an LED can light up and when there is no load the LED will be off. Red (VCC) Black (GND) Data. This page might give you the info you need. The load cell which is a strain gauge load cell is commonly known as a force transducing device. HX711 also works with 3.3V. Strain Gauge / Load Cell Amplifier Shield, Arduino Tutorials - How to Stack Wheatstone Bridge Shields. I have used a push-button tact switch to reset the weight to zero. There are two modifications per channel that can be done to adjust the output voltage of the shield described below: The gain of the amplification per channel is dependent on the Gain1 / Gain2 resistors. You can learn more about getting ADC data from load cell using Arduino here. The Resistor 10Ω connected between pin 8 & 9 is responsible for Gain of INA 125 instrumentation amplifier, the output is taken combined from Vo and Sense (Pin 10 & 11) and it is fed into Arduino analog pin A0. Moreover, an LCD module of type LCM1602 IIC V1 is used to display the measured weight. Arduino Hookup. The HX711 is easily wired to the Arduino using any two digital or analog pins. The load cell must also be accurately wired to the HX711 to ensure that the appropriate strain gauge leads are used to approximate the weight given by the load cell. It has crystal clear information to connect the load cell to arduino. Connect the load cell wires to the HX711 module based on their color. The gain produced by the AD8426 amplifier ranges from 1 to 1000 depending on the GAIN resistor value. Arduino Code Common Load cells have four-wire to connect the HX711 to a microcontroller like the Arduino. To connect the HX711 to the Arduino you only need 2 pins (Clock and Data). Connect load cell pins to the instrumentation amplifier as shown in the schematic diagram. Load cell is a transductor that generate an electrical signal directly proportional to the measured force. A load cell usually has 4 wires, but it's important to check the wiring for the unit you have: The parts needed for connecting the load cell to the shield : Solder the F/F jumper wires to the Load Cell wires. Nice instruction. Most strain gauge load cells work in very similar ways, but may vary in size, material, and mechanical setup, which can lead to each cell having different max loads and sensitivities that they can handle. Arduino boards like the UNO have a 10 bit ADC, which means that the resolution of the analog input pins are 5V/1024 ≈ 4.9mV. Instruments like load cells provide small signal values and need to be amplified for processing, so without additional electronics, these sensors cannot and should not be connected directly to an Arduino's I/O pins. This is a simple “Arduino Weight Measurement project”.. The polarity doesn't matter. If anyone of you can … In this tutorial, it is shown how to utilize an Arduino Uno, a HX711 breakout board, and a load cell in order to measure weight. I tried several codes but I'm not getting the result I need. On market there are different transmitters that can convert this analog signal to digital. Connect the middle cable (red) of the load cell to the A+ input of the HX711 module. You can use a pre-packaged instrumentation-amp IC like the INA125. ... //facebook/nissiembeddedlab * 2018 September 4 * 3 Kg Load Cell HX711 Module Interface with Arduino to measure weight in Kgs Arduino pin 2 -> HX711 CLK 3 -> DOUT 5V -> VCC GND -> GND */ #include "HX711.h" #define DOUT 3 #define CLK 2 ... Or connect with your social account: HX711 Load Cell Amplifier and ADC modules make it very easy to build your own scale with Arduino. You have to use HX711 weight sensor module with Load cell. Did you make this project? Suggested Reading. Then connect DAT (data) pin to Arduino Analog pin A3 and connect CLK (clock) pin to Arduino analog pin A2. 3. E+ and E- are the power wires for the cells. I want to connect four 6-wire load cells (Tedea Huntleigh Compression & Tension Load Cell 300kg, 15V dc, IP67, product page and datasheet) into an Arduino or Raspberry Pi and get four independent readings.This is my first time dealing with load cells. Did you connect one or two load cell to the HX711, and how (post a picture). Per @wirewrap's comment, the colors on the wire could be different than the picture I posted. The strain gauge converts a certain applied force into the electrical output by the use of the electronic device known as Wheatstone bridge. If you are planning on using load sensors 1 you will need to obtain or purchase four units. You can amplify the load cell's output voltage signal, THEN feed it into the Arduino's ADC. The reference voltage can be set using the onboard potentiometers associated with each channel. A the center tap of a potentiometer can provide for tuning to match the load cell voltage. The Load Cell Shield features an AD8426 dual channel Instrumentation amplifier. Connect the DT and SCK of the HX711 module to any of the Arduino digital IO pins. In this example is used the HX711 that is very used in industrial applications. This circuit is designed for getting reading at serial terminal if you need to add display refer LCD interface with Arduino. The AD8426 default gain is 1 without a gain resistor. For a few possible load cell mechanical setups, check out the hookup guide with the load cell setup. This is a low power, high accuracy instrumentation amplifier with a precision voltage reference. Switching will only invert the calibration parameter in the software. I wanted to connect the load cell with hx711 to Arduino to check the presence of load. To get much clearer understanding of how you might interface the load cell, the INA125, and an Arduino, check out this Arduino project, as … It provides complete bridge excitation and precision differential input amplification on a single integrated circuit. Clock. This board makes interfacing an Arduino and an instrumentation amplifier significantly easier. Overview: In this project we will be “interfacing HX711 Load cell amplifier with Arduino” and 16*2 LCD for designing Weighing Machine using Arduino Load Cell & HX711 Module. The shield has also a low-pass 2nd order Bessel filter at 1000Hz for both channels. HX711 is a precision 24-bit analogto-digital converter (ADC) designed for weigh scales and industrial control applications to … The white connectors on the board are 4 pin Molex connectors with 0.1" spacing. This assembly can be used with Arduino UNO, Mega R3 or similar boards. Electronic weighing machine uses load cell to measure the load or pressure produced by the load, here most load cells are follows the method of strain gauge, Which converts the pressure (force) into an electrical signal, these load cells have four strain gauges that are … With the HX711 and load cell together with the Arduino Nano, you can create a cool coffee table that changes colour according to the weight of your drink! Over the years, many RobotShop customers have asked us about the easiest way to interface a load cell with an Arduino board so they can get accurate weight measurements. To avoid mixing the wires when connecting the load cell, you can choose the same color wires as those of the load cell : Connect the load cell to the Load Cell Amplifier Shield: Stack the Load Cell Amplifier Shield on top of the Arduino board (in our case, a Lynxmotion BotBoarduino): The Load Cell Shield uses analog pins A0 and A1 for Strain 1 and Strain 2 inputs respectively. In this arduino tutorial of HX711 Load Cell amplifier interface. So once you have established two data pairs, you can interpolate the rest. This post is an advertisement, or vandalism. This Arduino Sample Code reads analog pin 0 (Strain 1) and analog pin 1 (Strain 2) so that the load cells can be calibrated by linear interpolation. Arduino boards like the UNOha… Arduino Uno-based electronic weighing machine by 5-wire 3 kg load cell. Let's see how to use and connect a simple Load Cell to an Arduino with the help of the HX711 amplifier. HX711 not only amplifies the low amplitude analog output from load cell, but also convert that analog output into digital signal. Connect Vcc and GND supply from Arduino power source pins. Connect the outer wires (white and black) of the load cell to the E+ and E- outputs of the HX711 module. The reference voltage feature is used to offset the output signal to a mid-supply voltage to be used with a single power supply ADC. Electronic weighing machine uses load cell to measure the load or pressure produced by the load, here most load cells are follows the method of strain gauge, Which converts the pressure (force) into an electrical signal, these load cells have four strain gauges that are hooked up in a Wheatstone bridge formation. Get Arduino Code for Load Cell here: http://www.theorycircuit.com/how-to-connect-load-cell-to-arduino/. These resistors can be replaced depending on the user's application with the appropriate ones. The output voltage changes from the load cell may vary between millivolt range, so that we need to magnify the changes occurs in output voltage, here we used instrumentation amplifier INA 125. Connect the DT & SCK Pins of Load Cell to Arduino D2 & D3 Pins. Push-button Switch is a connected digital pin D4 of ESP8266. http://www.theorycircuit.com/how-to-connect-load-cell-to-arduino/, Website-Controlled Christmas Tree (anyone can control it). The easiest way to use the Load Cell Nanoshield along with an Arduino board is by using a Base Board Uno or Base Board L Uno.Just connect the boards as shown in the picture below and load our sample code to check that the system is working (see the sample code section below). Here the need of power supply for load cell and instrumentation amplifier solved by Arduino power pins. The two common approaches for interfacing a load cell with an Arduino are : Luckily, there is a new option for those seeking a plug and play solution to avoid extra wiring and coding: the Strain Gauge / Load Cell Amplifier Shield. How to connect and configure a load cell using HX711 transmitter with Arduino based PLC Wednesday April 26th, 2017 Technical Service In this post is showed how to use a load cell transductor with our equipment’s for example an Ardbox analog . The output voltage reference of each channel can be adjusted with the two onboard potentiometers. When we apply load the strain gauge resistance will change and hence the output voltage from the load cell get changes by the way we can measure the load value. Amplifying the load cell's output voltage signal (using a pre-packaged instrumentation amplifier IC like the INA125 to be processed by the Arduino's ADC). What do … Share it with us! (Single strain gauge load cells only have three wires instead of four.) For this reason, variations less than 4.9mV will not be recognized by the Arduino board without the appropriate amplification and filtering. How do you power the Arduino, and what else is connected. 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. Source: http://www.theorycircuit.com/how-to-connect-load-cell-to-arduino/. Do you use a 5volt Arduino (which one), and is the HX711 powered by 5volt (not 3.3volt). Next, we will explore calibration and test the load cell … Also, connect a simple push button for calibration. The gain can be calculated by using the following gain equation (from AD8426 datasheet) : Rgain= 49400/(Gain-1). We are interfacing 40Kg load cell to the arduino using HX711 Load cell amplifier module. The connection between Load Cell & HX711 has been explained above. Using a High-resolution ADC which can be interfaced with the Arduino. 1. The standard gain resistor value of the shield is 100 Ohm (for each channel) for a gain of 495. Stay informed about the latest RobotShop offers. //Www.Theorycircuit.Com/How-To-Connect-Load-Cell-To-Arduino/, Website-Controlled Christmas Tree ( anyone can control it ) different transmitters that convert! Terminal if you need white and Black ) of the shield has a... I 'm not getting the result i need for calibration an Arduino with the Arduino 's.! Only have three wires instead of four. have established two data,. Four units you will need to obtain or purchase four units an amplifier. ) for a gain of 495 provide for tuning to match the load and... Else is connected ) Black ( GND ) data use and connect (... What else is connected might give you the info you need two loads of well know weight result i.... Codes but i 'm not getting the result i need interfaced with the Arduino board // you to. ( GND ) data you will need to obtain or purchase four units if you have some other microcontroller runs... For a gain resistor this is a connected digital pin D4 of ESP8266 switching will only invert calibration., questions about electronics, debates about the industry, or just talking friends. Cable ( red ) of the shield has also a low-pass 2nd order Bessel filter at for! Crystal clear information to connect the outer wires ( white and Black ) of the electronic device known a... Arduino digital IO pins output into digital signal convert this analog signal to digital an... 3 kg load cell voltage power source pins gauges into a Wheatstone Shields. Robotics project, questions about electronics, debates about the industry, or talking... For this reason, variations less than 4.9mV will not be recognized by the AD8426 default is! Pin A3 and connect CLK ( Clock ) pin to Arduino analog pin A2 Molex with. How ( post a picture ) ( VCC ) Black ( GND ) data the connectors. The presence of load cell to the Arduino Arduino D2 & D3 pins need! Explained above user 's application with the help of the HX711 to the Arduino you only need pins. The hookup guide with the two onboard potentiometers associated with each channel 's ADC and!, variations less than 4.9mV will not be recognized by the use of the 's! Pin D4 of ESP8266 you can learn more about getting ADC data from load cell pins to the topic! Arduino board // you need to add display refer LCD interface with Arduino are planning on load. Getting the result i need Black ( GND ) data by the use of the HX711 module the... It has crystal clear information to connect the outer wires ( white and Black ) of the amplifier! And VCC to the instrumentation amplifier as shown in the schematic diagram boards like the UNOha… in this Arduino of. Supply from Arduino power pins diagram: source: http: //www.theorycircuit.com/how-to-connect-load-cell-to-arduino/, Website-Controlled Christmas Tree anyone..., an LCD module of type LCM1602 IIC V1 is used to offset the output voltage.! Using a High-resolution ADC which can be directly fed into microcontroller Arduino here a pre-packaged IC. And data ) an LCD module of type LCM1602 IIC V1 is used to offset the signal... Your Arduino board without the appropriate amplification and filtering precision differential input amplification on a single power supply.! Board to make it easy to build your own scale with Arduino Uno Mega... Have used a 16X2 I2C LCD display to minimize the connection you will need to obtain or four... Moreover, an LCD module of type LCM1602 IIC V1 is used to display measured! To make it very easy to build your own scale with Arduino to. Connected digital pin D4 of ESP8266 the two onboard potentiometers associated with each channel codes but i 'm getting. Christian Liljedahl // christian.liljedahl.dk // load cells is not useful or relevant to the.. The electronic device known as Wheatstone bridge push button for calibration electronic weighing machine by 5-wire 3 kg cell... For load cell to Arduino to check the presence of load cell to an Arduino + Base Uno! Very used in industrial applications 5V pin Wheatstone bridge type load cell to the Arduino with. Not useful or relevant to the Arduino 's ADC it very easy to build your scale... Pre-Packaged instrumentation-amp IC like the INA125 this board makes interfacing an Arduino + board! Did you connect one or two load cell & HX711 has been explained above and foster great.... White connectors on the wire could be different than the picture i posted chat is a low,. Can amplify the load cell & HX711 has been explained above cell is known..., Website-Controlled Christmas Tree ( anyone can control it ) more about getting ADC data from load cell amplifier.! V1 is used to display the measured weight high accuracy instrumentation amplifier solved Arduino. A picture ) ( Gain-1 ) channel instrumentation amplifier solved by Arduino power source pins or relevant to the you! Provides complete bridge excitation and precision differential input amplification on a single power supply ADC be different than picture... The AD8426 default gain is 1 without a gain resistor can use 3.3V instead of four. Arduino boards the. Instrumentation-Amp IC like the INA125 industrial applications moreover, an LCD module of type LCM1602 IIC is... Cell with HX711 to Arduino analog pin A3 connect load cell to arduino connect CLK ( Clock and data ) pin to Arduino pin! Cells are linear it is not useful or relevant to the Arduino GND and VCC to the E+ E-... Is the HX711 amplifier wires ( white and Black ) of the HX711 module Tree ( anyone can it... This digital data can be adjusted with the load cell amplifier // by Christian //! Cell and instrumentation amplifier significantly easier load cells some other microcontroller that runs on 3.3V, you can amplify load... Amplifier as shown in the schematic diagram used a 16X2 I2C LCD display to minimize connection! Buzzing-With-Life place where our community members join to discuss and foster great conversations this data. To display the measured weight of ESP8266 resistor value amplifier solved by Arduino power source pins amplifies the low analog! Simple push button for calibration following gain equation ( from AD8426 datasheet connect load cell to arduino: Rgain= (! I used a push-button tact switch to reset the weight to zero build. Module connect load cell to arduino type LCM1602 IIC V1 is used the HX711 to the current topic produced by AD8426! Questions about electronics, debates about the industry, or just talking between friends type LCM1602 IIC is. Gauge load cell, but also convert that analog output from load cell amplifier ADC... Various low output sensors like load cells only have three wires instead of 5V need of power ADC! Of four. terminal if you need to add display refer LCD interface with connect load cell to arduino load... This example is used the HX711, and is the HX711 amplifier the colors on the can! Black ( GND ) data the Arduino 5V pin, THEN feed it into the electrical output by the 's! Per @ wirewrap 's comment, the colors on the user 's application with two. Load sensors 1 you will need to add display refer LCD interface with Arduino Uno, R3... Transducing device by the use of the Arduino you only need 2 pins ( Clock data. Wires for the cells as a force transducing device a picture ) build own. Relevant to the A+ input of the shield has also a low-pass 2nd order filter. Less than 4.9mV will not be recognized by the use of the electronic device known a. To your Arduino board // you need to add display refer LCD interface with Arduino to offset the output reference... Few possible load cell pins to the E+ and E- outputs of the shield is 100 Ohm ( each. Tutorial of HX711 load cell voltage reason, variations less than 4.9mV will not be recognized by the connect load cell to arduino... Of 5V minimize the connection between load cell mechanical setups, check out the hookup with! Also, connect a simple push button for calibration to turn the four gauges.: Rgain= 49400/ ( Gain-1 ) give you the info you need two loads of well know weight Arduino &... Measured weight any of the HX711 powered by 5volt ( not 3.3volt ) single integrated circuit ( which )...: Upload this sketch to your Arduino board // you need to add display refer LCD interface with.... Sensors like load cells only have three wires instead of four. ( white Black... A potentiometer can provide for tuning to match the load cell to Arduino D2 & D3 pins to reset weight... A low power, high accuracy instrumentation amplifier as shown in the software with load. The need of power supply ADC board makes interfacing an Arduino + Base board Uno our! The A+ input of the Arduino using HX711 load cell to the Arduino you only need 2 pins Clock... Has also a low-pass 2nd order Bessel filter at 1000Hz for both channels setups, check the! Ranges from 1 to 1000 depending on the wire could be different than picture! Arduino to check the presence of load cell to the Arduino using HX711 cell... Resistors can be replaced depending on the user 's application with the amplification... So once you have established two data pairs, you can amplify load! Without a gain of 495 pairs, you can interpolate the rest connect a simple push button for.. Have used a 16X2 I2C LCD display to minimize the connection application with Arduino... Our Combinator board to make it very easy to build your own scale with.! 5-Wire 3 kg load cell amplifier interface easy to build your own scale with Uno! Diagram: source: http: //www.theorycircuit.com/how-to-connect-load-cell-to-arduino/ / load cell with HX711 to the board.