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

[@MichaelHoffmannG]

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

[@demix3000]

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]

Thanks!

[@gust4699]

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

[@stephanstaheli404]

Thank you very much, your tutorial is excellent!

[@IndrekL]

Glad it was helpful!

[@L3on3ss4]

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]

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]

Please share the code 👌

[@blezalex]

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

[@joaocol2978]

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

[@IndrekL]

Glad it was helpful!

[@muhammadsameer883]

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

[@harikrishnanharikrishnan6074]

Sir, I have a doubt. I followed the same procedure, but the output of the load cell shows only NaN. I have checked the connections twice, but the result is still the same. What should I do, sir?

[@markpostlethwaite9672]

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

[@IndrekL]

Awesome, thank you!

[@TheRealStructurer]

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

[@adarshprasad965]

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

[@AnthonyHigham]

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]

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]

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

[@evan5542]

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

[@jaquelinedealmeidasouza7277]

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]

Glad I could help!

[@EdyBraun]

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]

have you made that.

[@dendrxx]

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

[@jaroslawmazur1312]

Great respect for movies about weights.

[@valked6485]

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

[@arduino5267]

Excellent work sir. Thanks for the explaination.

[@chrischivers1471]

Very good tutorial pal. Keep it up

[@meierjoe]

Finally understandable explanation thank you so much

[@praveenathsathyamoorthy495]

is it possible to connect 3 load cells?

[@izzdin158]

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

[@jerryrace4021]

Its easy to understand you thanks for the video

[@ferhatkangal4153]

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

[@shabyousaf7599]

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

[@Tony770jr]

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

[@perkarlo]

Thank you, that was so clean 👏

[@billd01rfc]

Excellent tutorial, thnx!

[@sebakiller9736]

Very cool and helpful presented for me thanks

[@hkalebjian]

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

[@neerajgupta1251]

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!

[@farizmamad]

Good explanation

[@Passepartout01]

Is this load sensor suitable for underwater use?

[@thalesdossantosvignoli4932]

Great video, thanks!

[@hahaha2894]

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

[@IndrekL]

Glad it was helpful!

[@Porter587]

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

[@johnnybuoy9551]

in such a case, if one of the 4 load cells is not working, or is out of order, how do we find out which one that one is? Instead of having to test all 4 one by one?

[@qzorn4440]

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

[@yosialukumai4593]

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

[@JulianJawadAhmad]

What is the maximum weight one can meaaure with this setup?

[@charlesw.61]

Brilliant, thank you!

[@CameronJeffers-fj3vd]

what screen did you use?

[@jessejoejackson]

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

[@luke77408]

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.

[@alejandroduarte5245]

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

[@Jim_One-wl4ke]

Thanks for sharing ❤

[@luigibuffone5533]

Good video. I am looking for a code to get in output 4 different measurement

[@connormarston8311]

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?

[@albertoazzinari7180]

Very nice video, but I have a problem getting the measurements. The values I get are constantly oscillating and none of them are correct. What could the problem be?

[@IndrekL]

Check th wiring. Maybe you have some bad connections. For me it was fluctating around 10 grams.

[@muhdsyihaam4413]

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

[@vaishnavipriya1387]

is there an HX711 library in C for BBB?

[@korina7942]

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]

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]

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

[@alvinkarmana7009]

can you explain how i can display the value in the tft display??

[@iotan09]

Thanks for sharing

[@Bear9211]

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]

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.

[@antoniobautista5302]

Does it need to be recalibrated everytime i turn it off and start it?

[@rjb-y4v]

can we conect to arduino without the clock pin ? tanks

[@wtf1379]

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]

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]

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]

@@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.

[@ItsmeJuds]

can it use it with a battery ?

[@cihankelesoglu2346]

Load_cell output val in calibration serial port: nan ,what could be the problem ? thank you

[@krisk3035]

same here

[@EliteGamerNumber8]

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

[@chsjqn9323]

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

[@stevenpetryk6869]

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.

[@milan1_092]

Can I use an esp32 for this project?

[@maximilianooyarce6866]

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.

[@BorisMarinković-t6d]

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

[@costeldinu8525]

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]

Plate of course

[@andreasrottmann4520]

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

[@RobertMurarik]

Hi, do you think it would be possible to connect 6 sensors and thus achieve the possibility of measuring up to 300 kg?

[@rsilvers129]

Why not get a 300 kg sensor?

[@anonymous2874]

What display is this?

[@mikephilmelendez]

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

[@paolospagnoli6029]

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

[@alejandromonsalvek.2014]

Hi Indrek, thanks for your video!! I'm having problems though using the Calibration example with 4 connected load cells, the measurement is not even close to what I'm weighing.... I've checked all the wiring and tried with different known weights in the calibration process. Thanks in advance for any advice!!

[@alejandromonsalvek.2014]

Got it, my problem was intermitency in cables continuity. I rewired and it worked just fine.

[@bahrilnugroho1474]

@@alejandromonsalvek.2014 did u solder it on board or just connected it directly?

[@alejandromonsalvek.2014]

@@bahrilnugroho1474 i soldered cell cables to pins and then connected these through a board

[@bahrilnugroho1474]

@@alejandromonsalvek.2014 okey i'll try it , thankyou alejandro

[@nadhinadhish8005]

Is it necessary mounting case for load cell?.... plz reply

[@IndrekL]

It is important that there is room for the inner part to flex. The mounting frame helps it. You could also drill a hole into your mounting plate to make room for the inner part to move relative to the outer part.

[@dads2wo415]

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

[@NMRocketry]

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]

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

[@bhargaj2706]

Can you create same video using 4 wire load cell

[@fenix11599]

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?

[@cornel830]

Hello, can i use 2 of them for 100kg? Thanks!

[@politicallycorrect8288]

What if I have 4 cable load cells, What do I do with the green cables?

[@antonparkinson8834]

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

[@abhidnyamhatre9177]

After Calibration step what should be done to check the output from load cell ?

[@esintufekci8344]

So usefull thanks

[@NashKowlagi]

What is the accuracy we get using a single 50kg load cells. The readings i get is very erratic and everytime I take the weight off the tare weight seems to change

[@mouhssinaakil]

THANK YOU

[@zuecifer]

you a real one

[@Powerhouse415]

Excellent tutorial, when I am calibrating the 4x 50 kg configuration my output values are significantly variable and cannot hold close to any mass. Is there any common causes for such instability/noise in the output?

[@IndrekL]

How much noise do you get? For it always fluctuated around +-10 grams

[@Powerhouse415]

Indrek it can be as great and sometimes greater than 1kg. Plus i find if i add a new load (5kg dumbell) it doesn’t end up recognizing the new load. I tried resoldering the connections to see if it would make a difference but I am seeing the same issue. Cheers for getting back to me

[@lehlologeloudi7575]

@@Powerhouse415 I'm experiencing the same problem, I'm even thinking it's coz I damaged the Amp module when soldering

[@MarkAnthonyJAVIER-hi5gb]

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?

[@annmanalo2686]

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?

[@rorypenstock1763]

Your accent is really cool, and I have no trouble understanding. Where are you from?

[@csake1]

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

[@abderrahmanmellalou359]

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

[@quadriakinbode4812]

Thank you for this project explanation. I'm working on this project and when I uploaded the "persistent zero offset" code, I was getting six digit float values as output val instead of the actual weight value. Kindly assist please

[@djamilaguettache4913]

THANK YOU VERY USEFULL

[@IndrekL]

You're welcome!

[@hacismailgenel6223]

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

[@pero2727]

Could you connect multiples of 4 of these load cells to a single HX711 to get a higher load rating? (for example 12pcs of 50kg cells to get 600kg load rating?) How would they be wired then?

[@niklasdecker8895]

Hey i want to meassure gramms, do they come in different sensitivities

[@IndrekL]

These three-wire load cells are 50kg each. But you can get the four-wire straight block load cells at lower weight range.

[@AlexanderMartinez-ej2rl]

Can this project be created using an arduino r4 wifi?