How to display the exact analog value?

[Madhu]

Hi!

I’m presently working on a data acquisition system using  8051 microcontroller  and ADC 0809. I’m getting digital data in my lcd corresponding to the analog signal but I need to display the exact analog data (say 2.366V) . Could you please help me develop an asm program to display the exact analog value?

 

Thanking you in anticipation.

[nikhiljain]

use the reverse algorithm which is used by the ADC to convert the analog siginal into digital signal.

[Madhu]

Thank you Nikhiljain……Hope this works out.

[Paramasivan]

I can’t understand. What is the reverse algorithm. Can you please explain in detail. I’m doing a project Energy Meter. It’ll be helpful for me.

[anurudh tiwari]

if u want to display the whole digit(including decimal point ) . first display the ral part of that.then display the decimal sign..after that display the digit after the decimal point…. algorithm for the display the correct decimal point is given below …

 

 

 1- reminder obtan from the real part first multiplied the 100(64h)

2-then divid the again from the divdend its give the some real part display it after the decimal sign….

3-repeat the above point again and again till which no digit want to display after the decimal point

 

 

i have done this program in assembally if any one required post here again..

 

[Author]

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