Using a 9~12V load cell with Arduino

Other Hardware General Electronics
1

Hi all,

I'm a complete newbie trying to connect some load cells to an arduino. I have some loadcells like this one: https://www.digikey.be/product-detail/en/sparkfun-electronics/SEN-13329/1568-1852-ND/7393715 and this amplifier https://www.digikey.be/product-detail/en/sparkfun-electronics/SEN-13879/1568-1436-ND/6202732.

If I connect them to an arduino, will the loadcell just take the 5V it provides and be maybe a bit less accurate but operational, or will everything go up in smoke? In the second case can I just connect some resistors to the load cell to lower the voltage it takes? Or would I be better off getting new load cells (I'd rather avoid that because I couldn't find 5V ones with two mounting holes like that)?

Thanks

2

The regulated ~4.25volt excitation voltage that the HX711 produces for the load cell is perfectly fine.
Load cells just give a lower output voltage when powered with a lower excitation voltage, but the HX711 compensates for that.
Leo..

3

Thank you Leo!

4

SPARKFUN TAL220 HX711 example

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