i have the load cell of 100kg i have a ADC NAU7802. i have to calculate weight through this ADC. can anyone have idea how to convert ADC value to weight.
Ok, but see my calculation is right or not
Look, do some basic tests and collect some data.
Put some standard weight combinations you know on the load cell. Measure the voltage observed. Get, say a dozen, measurements across the full range of the cell. Measure them with a volt-meter or scope, measure them with your ADC configuration. Put this data in a table. Write a small test application that enumerates through the table and generates results using your calculation method.
Then ask yourself are the results credible or not.
This is your work, magic internet fairies are not available to do it for you, it shouldn't take more than an hour or two of lab time.
You should be able to test the functional correctness of a calculation or algorithm autonomously with others holding your hand. Get to it!
Write a small test application that enumerates through the table and generates results using your calculation method MS Excel is a good tool for this. you can use formula bar to feed calculation formula.
Open Office and a couple of others are even good for the wallet.