Hello I am a software engineer and I dont have much experience of analog electronics.
I am doing a project of weight measurement using HX711 weighing sensor . below shown is a rough schematic of my circuit .
I am trying to measure various weights . As i increase the load cell capacity the fulctuations seems to increase as well . For load cells of 1 ton and more the fluctions increase tremendously . I have interfaced Hx711 with raspberry pi using this library Tatobari-hx711. i tried averaging that is given in this library ,that too doesnt seem to work. I also read that the Excitation vtg to load cell thru HX711 is noisy so i am powering the loadcell from SMPS itself .
1) Is there a simple way to reduce fluctions ? What can I try ?
2)what can be done in software to reduce noise ?
3)if the output of load cells is same (0-20mv) why does this issue arise ? is it due to multiplication factor ? lower range load cells work fine ..is it due to stable first bits of ADC output ?
4)I read somewhere that fluctions can be reduced using some hardware peripherals like resistors .
how to do it ?