HX711 Amplifier

[KILLERKID]

Hello guys, im currently working on a load cell project using strain gauges and the HX711 amplifier.

Coding wise all good but ive been searching and reading everywhere but still could not find how the HX711 converts voltage coming from the load cell into weight? is there a formula that converts voltage to weight ? if so whatt is this mathematical formula that the HX711 is using?
I tried to see if maybe the arduino does the conversion of the voltage to weight but still no clue.
It would be a great help if u could point me to the right article or the formula in question because i want to understand the principle behind going from voltage to weight and if you would be kind to explain if the microcontroller does the conversion to weight and the hx711 just amplifies the signal or not.

Update: i found that the arduino does the conversion from the voltage sent by the hx711 but still could not find how and again no formula
Thank you very much in advance.

[rolfk]

https://www.alldatasheet.com/view.jsp?Searchword=Hx711

It simply contains a 24-bit ADC controller. And a programmable PGA with 32*, 64*, and 128* amplification.

[KILLERKID]

Thank you for your response but i wanted to know what is the formula then that converts the voltage to weight? thank you

[dsb@NI · Accepted solution]

Try these resources:

https://www.ni.com/en-us/innovations/white-papers/07/measuring-strain-with-strain-gages.html

http://elektron.pol.lublin.pl/elekp/ap_notes/NI_AN078_Strain_Gauge_Meas.pdf

https://www.engineeringtoolbox.com/stress-strain-d_950.html

You may have to do some more research to verify how your load cell measures load. The resources above are relevant to a measurement based on strain gauges used most commonly in a Wheatstone Bridge configuration.

The load cell materials and geometry strain under the applied load. The bridge converts that strain into voltage. The linked resources provide those conversions, and you can solve for load as a function of measured voltage (V_out).