Simple Math

[brenda]

Hi,

I am playing with a pressure transducer. It has a capacity of 0 to 2.5 bar. the output is 0 to 5vdc proportional to the pressure.

Here is what I get using RA0 of 16f877.

At no load.... somewhere around 1.095vdc
With max load (1.5Bar) .... 2.4985vdc

Here is the question:

How can i convert it to percentage.
1v = O% and 2.5v=100%

Thanks!
Brenda

[SuB-ZeRo]

1v =1000 mv
2.5 v =2500 mv
2500 -1000=1500
1500 /100 =%1
i hope it will work

[CocaColaKid]

Off topic slightly but I have a silly question, I thought at 2.5 bar it should output 5V, not 2.5V? Either way the math still works.

[brenda]

hi,
many many thanks

brenda