Arduino Scale with HX711 and 50kg Bathroom Scale Load Cells

Arduino Scale with HX711 and 50kg Bathroom Scale Load Cells | Step by Step Guide.

Рет қаралды 263,584

4 жыл бұрын

Wiring diagrams for 4 x 50kg, 2 x 50kg, and 1 x 50kg.
In this video, I explain the three different ways to connect the 50kg bathroom scale load cells to the HX711 amplifier module and how to read the weight value with an Arduino. You can connect four of the load cells as a loop, two as a pair, or a single one with two external resistors.
Diagrams and pictures:
circuitjournal.com/50kg-load-...
Github page of the "HX711_ADC" library:
github.com/olkal/HX711_ADC
Buy from Amazon :
50kg load cells with HX711 module: amzn.to/3F4pc3z
Genuine Arduino Uno: amzn.to/2ZXfdsr
Resistor set: amzn.to/3bhwzIt
Male to male jumper wires: amzn.to/2TX0GZP
Wires: amzn.to/2zQj93q
(As an Amazon Associate I earn from qualifying purchases)
Buy from Aliexpress:
50kg Load Cells with HX711 Module: s.click.aliexpress.com/e/_AOZBU4
Arduino Uno Compatible Board: s.click.aliexpress.com/e/_AVaoKb
Resistor Set: s.click.aliexpress.com/e/_dTF...
Male to Male Jumper Wires: s.click.aliexpress.com/e/cnhvUw2c
Wires: s.click.aliexpress.com/e/_dWz...
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.
Music from KZfaq audio library.
/ @natkeefe

Пікірлер: 415

@MichaelHoffmannG 10 ай бұрын

I've been looking everywhere for how to use just a single one, and you not only explained it but made some diagrams. Thanks!

@blezalex 3 жыл бұрын

Huge thank you for explaining how to use 2 cells and 1 cell. There is a lot of info on 4 cell wiring in the internet, but almost no info on other configs

@L3on3ss4 2 жыл бұрын

I have spent hours looking for something like this online. I keep on coming back to it! Thanks so much. The presentation is incredibly well put together! Circuit tested and it worked!

@medb2322 2 жыл бұрын

hi i did the same thing as he did but when I put the weight I got the wrong result for example when I put a weight of 1200 g =>>>> i have this result Now, place your known mass on the loadcell. Then send the weight of this mass (i.e. 100.0) from serial monitor. Known mass is: 1200.00 New calibration value has been set to: 3.13, use this as calibration value (calFactor) in your project sketch. Save this value to EEPROM adress 0? y/n Value 3.13 saved to EEPROM address: 0 End calibration *** To re-calibrate, send 'r' from serial monitor. For manual edit of the calibration value, send 'c' from serial monitor. *** Load_cell output val: 1209.92 Load_cell output val: 1225.28 Load_cell output val: 1225.28 Load_cell output val: 1225.28 Load_cell output val: 1240.64 Load_cell output val: 1245.44 Load_cell output val: 1256.64 Load_cell output val: 1255.36 . . . Load_cell output val: 2963.20 Load_cell output val: 2950.08 Load_cell output val: 2933.76 Load_cell output val: 2947.84 Load_cell output val: 2943.68 Load_cell output val: 2949.12

@lebogangmagano3114 Жыл бұрын

Please share the code 👌

@demix3000 3 жыл бұрын

Great video. I've been working on a little project to transform an old bathroom scale into "smart scales" but didn't want to have to solder 12 wires into the "combinator" board that I have to then find out I had done it incorrectly. Showing the resistance between each wire and what to expect and more importantly "why", was a great aid. My load cells are in fact exactly the same as yours in terms of colour coding. I can't wait to get started this weekend! Once I've finished the project and I do a little write-up I will definitely recommend your channel!

@IndrekL 3 жыл бұрын

Thanks!

@gust4699 10 ай бұрын

Man, thanks a lot. Not many people that explain about loadcell such as the 3 wire loadcell. God bless you man

@joaocol2978 4 жыл бұрын

Very good Tutorial, best on the load cells out there! Thank you!

@IndrekL 4 жыл бұрын

Glad it was helpful!

@muhammadsameer883 4 жыл бұрын

Excellent brother. This worked perfectly on NodeMCU with my hacked bathroom scale

@markpostlethwaite9672 4 жыл бұрын

Brilliantly explained video! I’ll be keeping tuned in.

@IndrekL 4 жыл бұрын

Awesome, thank you!

@TheRealStructurer Жыл бұрын

Clearly described and just what I needed for a project. Thanks for sharing 👍🏼 My project will sound different though 😉

@evan5542 3 жыл бұрын

Thank you so much for this video. it really help me for my thesis

@EdyBraun 3 жыл бұрын

Nice video! I just ordered this kit and going to build it, thanks for making the video! I will watch closely! Wish me luck.

@sumitpandey-tw7rm Жыл бұрын

have you made that.

@AnthonyHigham 4 жыл бұрын

Thank you for the detailed video! For some reason my 3d printer was printing the load cell mounts completely solid with no opening at the bottom. To remedy this, I opened the STL files in Creo as a .prt and then saved it again as an .STL and it now prints correctly.

@IndrekL 4 жыл бұрын

Maybe it depends on the slicer software. I used MatterControl and had no issues. I found it on Thingiverse and I didn't design this part myself.

@AnthonyHigham 4 жыл бұрын

Indrek that’s a good point. I was using Cura for this project. Do you have a preferred layer height for good strength?

@jaquelinedealmeidasouza7277 4 жыл бұрын

I Just wanna thanks to you for share your knowlodge with us and this will help me with my school's projects more than ever cause I don't have real teacher's support and I need show this for him and I don't have any ideia where I've should start.. until now ♥️🇧🇷

@IndrekL 4 жыл бұрын

Glad I could help!

@adarshprasad965 5 ай бұрын

😇 Thank you so much, the explanation was pretty detailed. I have been all over the internet for this...

@dendrxxoliver2712 2 жыл бұрын

Great job this was a great help for my little pet project that I was gonna work on.

@jaroslawmazur1312 3 жыл бұрын

Great respect for movies about weights.

@chrischivers1471 3 жыл бұрын

Very good tutorial pal. Keep it up

@meierjoe 3 жыл бұрын

Finally understandable explanation thank you so much

@shabyousaf7599 3 жыл бұрын

Very good video and much more detail which helps. Thank You

@perkarlo 2 жыл бұрын

Thank you, that was so clean 👏

@tempeldeswahnsinns2357 Жыл бұрын

thank you for this great explanation!

@hahaha2894 4 жыл бұрын

Thank you very much for this great video and for the explanation.

@IndrekL 4 жыл бұрын

Glad it was helpful!

@valked6485 Жыл бұрын

Finally... I founded. Thank You very much!

@connormarston8311 2 жыл бұрын

Hello, thank you so much for this tutorial. I am confused on one point-> in your video, when you wire your four weight sensors it appears the sensors are arranged (referencing the red wire) E+ upper left, A- upper right, E- lower right, A+ lower left. The wiring diagram on your video shows the same clockwise arrangement of E+,A-,E-,A+. However, the diagram connects white->white on the top sensors and bottom sensors & black->black on side sensors. When you wire in the video you have flipped, with black on top-bottom and white on side-side. Am I wrong/or missing something...or does this change not affect anything?

@billd01rfc 3 жыл бұрын

Excellent tutorial, thnx!

@Tony770jr 3 жыл бұрын

Nice video... It will help me a new project I'm working on.. Thanks!

@arduino5267 6 ай бұрын

Excellent work sir. Thanks for the explaination.

@qzorn4440 2 жыл бұрын

very interesting 🤔 i just worked with a load-cell calibrated in newtons 🥳 thanks a lot

@thalesdossantosvignoli4932 Жыл бұрын

Great video, thanks!

@stephanstaheli404 5 ай бұрын

Thank you very much, your tutorial is excellent!

@IndrekL 4 ай бұрын

Glad it was helpful!

@jerryrace4021 2 жыл бұрын

Its easy to understand you thanks for the video

@izzdin158 3 жыл бұрын

Thank you for the video i can use this sensor for my project

@sebakiller9736 2 жыл бұрын

Very cool and helpful presented for me thanks

@EliteGamerNumber8 2 жыл бұрын

If you were to apply a load to the sensors, would you notice a increase/decrease in the resistance that’s significantly different than 1 ohm? I think my cells are defective

@alejandroduarte5245 Жыл бұрын

Great video @indrek , I have a question , can I replace the load cells by just 4 strain gauges ?

@charlesw.61 3 жыл бұрын

Brilliant, thank you!

@harlequin516_yt 2 жыл бұрын

Excellent! Thank you! It look a while for me to understand how the 4 load cell arrangement is just a additive resistance (joined color 1 wires) and subtractive resistance (joined color 2 wires) across two sides of the two cells. I had to stare at it for a long time to really get it.

@stefanguiton 3 жыл бұрын

Great video!

@IndrekL 3 жыл бұрын

Thanks!

@wdanni9410 Жыл бұрын

Cool video!

@Jim_One-wl4ke 3 ай бұрын

Thanks for sharing ❤

@farizmamad 4 жыл бұрын

Good explanation

@farajelsakloul2703 2 жыл бұрын

Hi there, Thanks for your instructions which is really helpful. I am trying to use the same load cells with 4 cells designed. I am wondering about how can I power them as I am trying to use them with data logger. Could you please assist me with this? Many thanks

@hkalebjian Жыл бұрын

This amazing! Quick question. How much energy does this setup use if left on for an hour?

@neerajgupta1251 Жыл бұрын

Hi, This is very good video, no wit is time to got to the next level of tearing down smart scale which use bluetooth connection to send the data to the mobile app!

@chsjqn9323 2 жыл бұрын

Thanks for detail making video. Can I ask how you connected the jumper cable with HX711 ?

@luke77408 2 жыл бұрын

Thanks for the video I need to make something to measure 1 mg to 1 g can I use this tools or the measurements wit this device isn’t going to be precise to 1 mg.

@annmanalo2686 Жыл бұрын

Thank you for your helpful tutorial. Question: If you only stand on one side of the four cell circuit, is the result will be accurate?

@Porter587 2 жыл бұрын

I have been struggling. Is there a piece to help the HX711 amplifier module to the loadcell wires?

@georgeshaw5959 2 жыл бұрын

Would I be able to use this with an s-type load cell for a more dynamic system? It still is Wheatstone. I have a system where the load oscillates between 500 lbs in tension and 500 lbs in compression multiple times per second. Based on the time it took for the measurement of your weight to get back to 0, I'm not sure this type of load cell/load cell amplifier would work.

@gyggit 2 жыл бұрын

Hey, buddy, thank you so much!! You really helped to sort out this case. And you have a worthy assistant growing up :))

@stevenpetryk6869 2 жыл бұрын

Is there a good way to put some nice rubbery feet on the bottoms of the load cells? I want to build my own scale, but this would slide all around on a tile floor.

@paolospagnoli6029 8 ай бұрын

Excellent work, congratulations!! if I wanted to activate a relay output from Arduino on a weight greater than 50Kg how could I do it?

@zuecifer 26 күн бұрын

you a real one

@jessejoejackson Жыл бұрын

Hi, super good video with how to add a screen like you have or a smaller one

@iotan09 3 жыл бұрын

Thanks for sharing

@NMRocketry 4 жыл бұрын

Can you change the rate of the load cell amp from 10 to 80 hertz? I have the sparkfun HX711, and there is supposed to be a way to change the rate, but I don't know how. Thanks.

@IndrekL 4 жыл бұрын

Hey! The "HX711_ADC" library has "setSamplesInUse" method. Maybe this sets the sampling frequency. I haven't tried it myself.

@robostudio4305 Жыл бұрын

Hi Indrek, many thanks for your very well prepared lecture. Can you do me a favour and explain to me, why the wiring, which you describe for the 4 loadcells, ensures the proper power supply and measurement. Somehow I cannot see there, why this circular wiring supplies the loadcells with the proper voltage. Thanks in advance, Detlev

@antonparkinson8834 2 жыл бұрын

I have just purchased an S-type load cell which has 5 output wires, will I be able to use this set up to take a reading? If so what is the fifth wire for? I hope you can help, thank you Anton

@yosialukumai4593 6 күн бұрын

Thanks for the great content, if I am getting negative from my sensor whar could be wrong

@esintufekci8344 3 жыл бұрын

So usefull thanks

@Bear9211 4 жыл бұрын

hi love the video, super well explained, but if i could please get some help?, im getting a drift with my measurements, like when i dont change the weight i still see the measurement either go up o down constantly, what could i be doing wrong?, i've already cheeked my connections, and everything seems to be in order could i have some faulty sensors?

@IndrekL 4 жыл бұрын

It is normal with those cheap sensors. Those are suitable for short term measurements - you set the zero point and then measure. They will also drift over time due to temperature changes during the day.

@bagaspermana88 4 жыл бұрын

Lol this is what I am looking for recently

@ericw46732 Жыл бұрын

I am new to the world of Audrino IDE. I am trying to build a scale using in-line load cells to a junction box to an amplifier to an Audrino Uno R3. I have a display hooked into the Audrino. I am looking to put fasteners onto the scale and convert the weight to PC count and have it show on the display. I am having problems on which libraries to load in the IDE and the proper coding to use to get the results that I seek. Any suggestions????

@mejekin 3 жыл бұрын

I want to make this weighing scale for commercial purposes... can you help me with pcb layout and other arrangements. I have sourced toughen glass and 3wire load cells..

@raslenharrabi1210 4 жыл бұрын

thnaks , great video but i don't find HX711 amplifier in isis proteus ? can some one help me plz ?

@ignaciobarubayce5710 4 жыл бұрын

Thanks for the explanation. Is it possible to connect more than four load cells to the HX711 amplifier? If possible, is it possible to detect in which load cell the pressure ejection is?

@IndrekL 4 жыл бұрын

Hey! Yes, the HX711 has two channels A and B. So you can connect 8 load cells to one HX711. In a four cell circuit you can not detect the pressure on a single cell. If you wan to detect pressure on a specific load cell then you have to connect them one by one. In that case you can only connect two cells per HX711

@ferhatkangal4153 2 жыл бұрын

dude, thanks for saving my ass at the last day of my project. huge respect.

@maximilianooyarce6866 2 жыл бұрын

Hello, a query do you have the design of the housing that you did to the cell please, I need that to be able to print it in 3D, thanks for the video.

@costeldinu8525 3 жыл бұрын

Thank you for video, it helped me. one question, please, what do you think, supposing that between the plate with the four load cells and the arduino will be a cable of 2 meters, would be better that the hx711 to be on the plate or on the arduino? the analog signal from the bridge is around 1mv and maybe will be not transmitted accurate. Thank you

@bixenbaer 3 жыл бұрын

Plate of course

@djamilaguettache4913 4 жыл бұрын

THANK YOU VERY USEFULL

@IndrekL 4 жыл бұрын

You're welcome!

@ebealienthy 3 жыл бұрын

Thanks and a like for the tutorial. I'm working on a logitech G25 steering wheel, and I would like to connect (many have done so but there are no schemes) the load cell in question to the brake pedal. Is it possible to receive support? It originally worked with "apelectric" cell and "DIView" software but it burned out. Now would I really like to use these by creating a new brake and calibrating them? Thanks in advance

@IndrekL 3 жыл бұрын

Hey! If you have some specific questions then I can try to answer.

@korina7942 4 жыл бұрын

Thank you for your tutorial. How to connect the LCD screen with the board and what code should be added to display the index onto the screen? Could you please give more info about this and also the wiring diagram for adding the screen?

@IndrekL 4 жыл бұрын

Hey! I didn't add screen to this tutorial since it depends which screen you have. Every screen have it's own connection diagram and libraries.

@raffaelecesarano9186 3 жыл бұрын

@@IndrekL hi please can you upload the code with the screen ?

@abderrahmanmellalou359 3 жыл бұрын

hi thank you for this wonderful video. Please do you have a code that display the load scale every 10 minutes. and thank you

@mikephilmelendez 2 жыл бұрын

Great video!! 👍. Question, what is the difference between genuine Arduino and Arduino nano compatible board??

@BujjiWir 3 жыл бұрын

Thank you bro.

@dads2wo415 Жыл бұрын

Great video. I have one question, what is the problem if the load cell can't detect any Calibration it is still a 0 value? First, I already did but now it didn't get the calibration factor. The load cell, module, and wiring are good. I don't know what is that the problem

@saikiran-io1sy Жыл бұрын

I would like to use I2C concept because i want to connect each load cell seprately to single arduino so do i need to keep each amplifier for each load cell or is it sufficient connecting each load cell separately to single amplifier, please suggest?

@csake1 Жыл бұрын

Hi how would I program 4 separate hx711 scale to show up on the arduino individually

@MarkAnthonyJAVIER-hi5gb Жыл бұрын

Hello Indrek, I have tried to calibrate with a 4 load cells but the serial monitor displays unknown characters what could be the possible fault?

@fenix11599 2 жыл бұрын

hi good video bro, excuse me i have a question i need the load cell but for 200kg with the old bathroom scale how can i calibrate for that?

@kiullervieirafirmino3261 3 жыл бұрын

Is there any possibility of use 3 Load cells instead of four, maintaining the same precision???

@mouhssinaakil 4 жыл бұрын

THANK YOU

@user-kv3pr4pl7u Жыл бұрын

Great video!!! Is IT possible to setup IT with GSM module so i can receive SMS on demand with actual weight of beehive?

@neerajgupta1251 Жыл бұрын

Hi, I am using a one button load cell (Load Cell - 200kg, Disc (TAS606)) to measure weight, it has allready 5 wires, so I am just connecting it to HX711 to amplify the output. Now the problem is the reading are very unstable, swaying around very fast. Is there a way to satbilise its readings? Thanks for your help

@dnhftm 3 жыл бұрын

Very Nice video

@lucianoaraujo4479 3 жыл бұрын

Teria como fazer uma esteira com pesagem dinamica de frascos. Parabens pelos videos

@wtf1379 4 жыл бұрын

thanks for the great video, really usefull, i would like to know how to reuse the calibration value so i do not have to calibrate it everytime i run the program

@IndrekL 4 жыл бұрын

Hey! After you have run the "HX711_ADC"->"Calibration" once then the calibration parameter has been written to the eeprom address 0. Then you can open "HX711_ADC"->"Read_1x_load_cell" instead. Uncomment line 28: EEPROM.get(eepromAdress, calValue); Then it will read the calibration parameter from eeprom and you don't have to re-calibrate every time.

@rakabayuwana4830 4 жыл бұрын

Hey, I've tried to write the command in line 28 in Read 1x load cell example but then I get " 'EEPROM' does not name a type" error message. How could I possibly resolve it?

@IndrekL 4 жыл бұрын

@@rakabayuwana4830 Hey! The example code has changed since the video. It's not line 28 anymore. Find this line: //EEPROM.get(calVal_eepromAdress, calibrationValue); and remove the two "//" in front of it.

@andreasrottmann4520 Жыл бұрын

Wauw. looks great! can i use 6 pieces of weight scale? i need 300kg. can i use B- und B+ for it?

@appledoodle7464 2 жыл бұрын

heya! this is pretty awesome however how would it work with 3 load cells? would you need the 2 1k resistors just like you need them for the 1 load cell setup and then basically mimic the 4 load cell setup? thanks in advance!

@adamfermor2669 2 жыл бұрын

If possible I'd use 2 or 4 instead of 3

@thomasb4118 Жыл бұрын

@indrek I'm utilizing the 2 load cell configuration and getting a readout in Arduino of "Load_cell output val: nan" after calibration...Any ideas on how to fix?

@kaio_p.a 2 ай бұрын

how you solucionated?

@neshineshi1896 Жыл бұрын

hey, i made the same setup with four. When I run the program, it shows the correct value at the beginning, but immediately starts to increase or decrease slowly and endlessly. Any idea?

@adynis Жыл бұрын

Is there any solution for 6 load cells ? (or I need to use 2 HX711 and read them both from the microcontroller?)

@muhdsyihaam4413 4 ай бұрын

hi, if we use the other lcd do we need to change the coding?

@unknownblueblue 3 жыл бұрын

Thanks :)

@kuanhau4323 2 жыл бұрын

Is it possible to connect 4 pairs of load cells (total 8 cells); to give 4 output values?

@rom19824sc1r 2 жыл бұрын

Hi... Is it possible to add 6 load cells total ? Or two hx711 with 4 load cells each to weight 400 kgs? Thanks

@aboodabuibaid3405 3 жыл бұрын

HI .. Can Ibuy a scale and connect it to arduino with a small robot arm connecting to the same arduino so that if thw weight of the object goes down , the robot arm can get a signal and take the object away ?

@hacismailgenel6223 3 жыл бұрын

Hello. Can't we use this sensor 3 channels?

@Brigada85 2 жыл бұрын

Sorry for my noobie question Indrek but what the name of the adaptators that you used on the hx711 ? Thank you :)

@TadyZaZ 4 жыл бұрын

I have a question. I would like to make a scale to measure beehive weight changes during a year, make a kind of weight data logger that would take weight value every hour. I'm worried that this type of load cell would not handle constant heavy load very well and over time become inaccurate. What do you think about that?

@IndrekL 4 жыл бұрын

Yes, I am afraid that it will just deform over time. But, I have not tested it like that.