Problem in my PIC16F877A Program displaying correct dc input voltage on the LCD!!!!

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BRL6

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Hi,everybody.I wrote a program with mikroC for PIC PRO/2009/V2.50 ,to measure
a DC voltage input using 16F877A.But it shows the input dc voltage wrongly and uncorrectly;[ it shows 0.014v instead of correct form; 14v ].
I attached my program and its proteus.would you please tell me what is wrong with my program to correct it?

Thanks,
 

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  • XHE1X16.c
    2.9 KB · Views: 191

hi,
You appear to be dividing the adc value by 1000.? before you decimalise it.
ch0 = adcval0/1000 ; //prepare value for display in V . xxxxxxxxxxxx
 
Hello,ericgibbs.Thanks for your help;would you please tell me how I should decimalise the adc value?

Thanks,
 
I would do it this way
ADC_value x 1400/1024

tc = tc/100;
LCD_Out(1,1,tc);which should give a nice 0 to 14 volt reading

like this
It's set 15 volts
 
Last edited by a moderator:
My input dc voltage range; 0-100V

Hello,be80be .Thanks a lot for your solution.If my input is 0-100v ; any changing
at your instructions will occurs?

Thanks,
 
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