Multiple Load Cells

Projects General Guidance
1

Hello,

I am working on a project where I would like to fairly accurate measure weights (+-1g). I have tried the square shaped load cells, which work perfectly fine for my use case:

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image262×192 37.7 KB

As I need more stability for the measured weight, I thought I would go with the human scale load cell:

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image1024×1024 117 KB

However, when I bought them, the tolerance was nowhere to be found and only after I have tried them, I figured out that the tolerance is around +-10g (in my case even more).

Now to my actual question, I want to use 3-4 of the square shaped 1kg load cells and was wondering if there is a certain setup that I should follow in order to make it work. As these have 4 cables and the wheatstone bridge is already set up inside of each load cell, I assume that I will need 3-4 HX711 Amplifiers as well.

Adding up all readings should do the job?

This is how the Thermomix does it: Thermomix TM5 Teardown - iFixit (Step 12)

Thanks in advance!
Schlappo

2

https://www.google.com/search?q=4+HX711&source=lnms&tbm=isch

1 Like
3

Great thanks for sharing a google link, unfortunately it doesn't answer my question.

4

Yes

1 Like
6

Yes I did read google (even page 2 :wink: ). However, I am not quite sure which part of my question you don't understand? Let me repeat what I said in my first post, and highlight the important parts for you:

Now to my actual question, I want to use 3-4 of the square shaped 1kg load cells and was wondering if there is a certain setup that I should follow in order to make it work. As these have 4 cables and the wheatstone bridge is already set up inside of each load cell, I assume that I will need 3-4 HX711 Amplifiers as well.

The picture you sent are 4 x 50kg loadcells.

Hope this clarification helps?

7

Yes and Yes

1 Like
9

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