you did good job bro, keep creating video like this

@ Friedrich Kegel Hello, I'm working on a similar project, but we use 4 cells of 2 tons each. I'm looking for information about accuracy, I should put it in 500 gr but I have not found information. I thank you for guiding me.

A good video. Go one step further and activate a relay, when the scale reaches a target weight; make that target weight adjustable via two buttons (+ve / -ve)

@mediahawkai

3 жыл бұрын

How would one do that?

Hello I used the same organs like you. The problem is, on the screen I get a variation on the value obtained after the weighing. So I need to stabilize this value, I don't know if there is a component / organ (filter for example) that I can use to stabilize the displayed value. Please help me

Hello, what hardware was used for this load cell configuration? Thanks!

Спасибо хорошее видео!

Have u tried with 1kg load cell? I'd need 0.1g of accuracity. It's possible?

good job

Hola amigo, Muy excelente tu aporte, le agregue unos cambios para exportar Datos a Excel PLX-DAQ, te compartiré pronto el proyecto.

halllo bro.. What is the minimum weight that can be weighed?

I am surprised that you get this amount of precision when supplying the power to the HX711 from the arduino, that itself is powered from your PC. I have issues with tremendous amounts of voltage ripple using that same setup. I'm currently trying different approaches using various LP-filters. Do you have some more information about the code that you added? You wrote something about a creep filter and zero point drift.

@FriedrichKegel

3 жыл бұрын

As you mentioned, you would probably would need to work on stabilizing the power supply and compensate temperature I think. Check out the spark fun website with their code for comparison!

hi, I wanted to know if the calibratioin factor is different with different setups. Or do you calculate the calibration factor once and then you always use that factor for that load cell. Thank you!

@FriedrichKegel

5 жыл бұрын

It is the same for the same load cell - might vary over different load cells due manufacturing tolerances. Additional factors might be environment temperature and material consistency - which i didn't explore in detail. There is also a thing called "drifting" which moves the value over time - i can imagine its solved in more "industrial ready" devices :)

@ptaczek

3 жыл бұрын

@@FriedrichKegel Hi there, drifting is a phenomenon well know in the weiging world. The more precise the scale the more sensitive it is to the environment. Next to calibration which should be done idelally before every weighing session starts, the environment selection and treatment is at the same level of importance. Once you want/need repeatable precise measurements say to the 4th 5th decimal place and lower, you need to have dedicated weiging desk, firmly set to the ground without any moving air, vibrations, direct sun light, magnetic or electromagnetic noise and with stable temperature and moisture :D Scales like this usually employ automatic calibration mechanisms and are capable to compensate most of the normal fluctuation of the variables I mentioned. And then there is a whole weighing manual every lab asistant needs to follow to actually get the right readings :D But even miligram-precise scales need recalibration on regular basis and at least a solid desk in a room with no wind, direct sun light or nearby heating. Otherwise there will be the permanent change in the reading also known as drift.

@FriedrichKegel

3 жыл бұрын

​@@ptaczek Thank you for the insights on the topic! I already imagined there is a whole world behind the details of it.

Thanks for the video. What would you say is the minimum weight you can securly measure with that 100g load cell?

@FriedrichKegel

5 жыл бұрын

i would say at least 0,1g, but more likely 0,05g

@peteraugust5295

5 жыл бұрын

@@FriedrichKegel Thanks. i would need at least 0.05g accuracy... maybe i will order a loadcell and test it.

@johnminnick1228

Жыл бұрын

@@peteraugust5295 I am working a similar problem with a need for 0.05g accuracy as well. I know this is a 3 year old comment but did you have any success? Were you able to get the 0.05g accuracy?

@peteraugust5295

Жыл бұрын

@@johnminnick1228 scary to see that this was 3 years ago and I still did not finish the project ;) I foung a 50g losdcell, and can easily measure 0.05g with it. I trust it with an accuracy if 0.1 grain or 0.005gramm.

@johnminnick1228

Жыл бұрын

Would you be willing to disclose the specific 50g load cell? I found some online but I would like to know the specific one you're referring to.

can you name which load cell you used with HX711 ???

@FriedrichKegel

7 жыл бұрын

this one is the standard 100g Load-Cell you can find at aliexpress under the searchterm: "100g small range high precision weighing sensor"

The link to the Load Cell code appears to be for calibration. I've found it useful for my project, but is it missing the follow up code once the load cell is calibrated? Can you post the code for that?

@FriedrichKegel

6 жыл бұрын

Which you mean? It is the code i linked in the video discription. Just modify it and hide the calibration stage in the background.

@areenzyoud9489

5 жыл бұрын

@@FriedrichKegel i work on same project, how should i use the code i have no idea please help me

@FriedrichKegel

5 жыл бұрын

@@areenzyoud9489 Whats the problem?

@areenzyoud9489

5 жыл бұрын

@@FriedrichKegel Is there a way to contact with you?

@areenzyoud9489

5 жыл бұрын

@@FriedrichKegel I put the code on IDE as it is and trying to weight different things but reads don`t change

does the code still work for a 500g or 10kg load cell?

@FriedrichKegel

4 жыл бұрын

Yes, you just have to pick the correct calibration factor for the setup once!

Did someone tell you today, "I LOVE YOU"? "ICH LIEBE DICH"? Darn nice and complete study, thank you.

What is the highest weight it can handle ? On AliExpress it is said 150g and you put 400 !

@FriedrichKegel

4 жыл бұрын

Paul #GRL You can overload it savely around 200-300%- just take into account it might deform permanently at one point and influence further readings. However this might reduce the reliability of the readings.

@paulgrl5227

4 жыл бұрын

@@FriedrichKegel Ok this explains why the seller says the safe limit is about 150%. But did you really get some noticeable deformations when overloading it?

@FriedrichKegel

4 жыл бұрын

@@paulgrl5227 I don't remember the exact overload capacity, i think it also relates to manufacturing tolerances of the flexible adhesive and the machined part. But i found some scales deformed after several tests. However they can still be used - just the calibration needs to be reset. And i can imagine that the total range might change as well from that.

@paulgrl5227

4 жыл бұрын

@@FriedrichKegel Ok i won't try to go over the limits. Btw i saw on AliExpress that the safe limit is 150g

why does the value fluctuate so much?

@FriedrichKegel

3 жыл бұрын

Because its a 5€ sensor and not a 500€ sensor? Needs temperature compensation, electrical filters and advanced filtering of code ;)

@muhammadbasir83

3 жыл бұрын

because he moves/touch the weight.

I bought cheap 10 kg load cell from China, and my best accuracy I can get from that sensor is about +- 10 g in short-time measurement. Is there anyone who have experience with this range? What was your accuracy?

@FriedrichKegel

4 жыл бұрын

I guess thats pretty good - i mean the accuracy always relates to the total measurement range - so if you have 10.000g that is 0,1% which is pretty good i think. If you need more i think you have to upgrade to more precise/high end solutions. Or downgrade to a smaller measurement range like 5 or 2kg.

@FUKYFILM

4 жыл бұрын

@@FriedrichKegel Thanks a lot :)

why this seen.please tell (mehx711.h no such file or directory)

@FriedrichKegel

5 жыл бұрын

Hey, sorry no idea why - maybe there was a server issue? I tried right now and its working

I have still drift issue

@FriedrichKegel

3 жыл бұрын

If you want to eliminate it fully, you have to add temperature compensation also or use advanced filtering.

@ravikumarbiradar1115

3 жыл бұрын

@@FriedrichKegel can u provide some documentation

@ravikumarbiradar1115

3 жыл бұрын

Ppz tell mi wich filter should I use, I am using 500gm load cell it drift to .35gm.