analog to digital using 89c2051

[Micro Lover]

hi
i want to read the analog signal using 89c21, and convert it to digital

e.g

if signal signal is 5v then convert it to 255 in digital form, and if signal is 2.5 volt then it will be 127

is it possible, if yes then HOW?

using software : KEIL
language : C

thnx

 

[ud23]

you can use 8 bit adc ad0804 and its easy for conversion hope you are familial with analog to digital conversion(ADC).

**broken link removed**

see this site

if signal signal is 5v then convert it to 255 in digital form, and if signal is 2.5 volt then it will be 127

is it possible, if yes then HOW?

if you use 8bit adc it will give you 0 to 255 digital count according your analog voltage you want 255 at 5v so set your vref+ to 5 v and vref- grnd so your maximum rang is 5v
and at half rage 2.5 v you will get 127 count i think that's what are you looking for.