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avatar_shantanu@india

HX711 grief

Started by shantanu@india, Sep 25, 2021, 04:12 AM

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shantanu@india

Hi,
I am facing alarming levels of drift in HX711 load cell amplifier.
Have anyone faced this before?
Thanks.
Regards
Shantanu

shantanu@india

Seems to be due to an ill configured precision voltage regulator circuit that comes built-in.
These devices seem to very cheap and very unreliable.
Thinking of using TI 20 bit sigma delta ADS1230 with a multiplexer like 4066/51 at the frontend to connect to multiple load cells.
Is switching load cells recommended?
Regards
Shantanu

keytapper

I think that the cells should be joined in series. About those module it would be better if use an average reading.
I made a small test, see this (I hope it will be translate for you)