Two load cells and INA125P

Using Arduino General Electronics
1

Hi again, :slight_smile:

I made Half-Bridge 2 Load Cell sensors and INA125P circuit. This circuit works, but not how I thought. Positive sensor increases voltage and negative sensor decreases voltage. How to calculate voltage between two sensors?

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Edited..
Depending on how you have mounted the sensors, you might have to swap one of the sensor's white and black wires, so one sensor outputs a positive going voltage while the other one outputs a negative going voltage.
Connecting both the same way is like this.
Leo..

3

Pretty sure that the red wire is the sense wire on those strain gauges, not excite+. I think he has it wired correctly.

I'm just not sure what the question is.

4

I think you're right about the colours.
I have edited the post.
The other half of the story is still valid.
Two load cells "in phase" will always null, independent of the weight.
Leo..

5

Thanks Wawa!
One box of beer from me! I changed wires and got 0mV. When I pressed 1st and 2nd sensor volume increased!

+1 your karma!

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Thank you.
Leo..

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