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Title: Picbasic pro source help Post by: leemarrow on April 27, 2005, 01:07:17 13:07 i have write a code for 16f876 for reading a temperature from a lm35cz.
Now i must subtract a vref of 2,5 volt from ad conversion result: ADCIN 0,AD_Raw Place the conversion of channel0 into AD_RAW AD_Result=(AD_Raw*10) */ Quanta ' Quantasize the result where Quanta is 1250 (source from EXPERIMENTING WITH THE PICBASIC PRO COMPILER). Now i have try to subtract from AD_Raw the number 25000 (2,5 volt) but it not work correctly. which number I must subtract from AD_Raw??? (2,5 volt is my ref voltage for negative mesure) Title: Picbasic pro source help Post by: nimdonia on April 27, 2005, 02:39:02 14:39 is
25000 = 2.5 volt? check tht first proly haf u make it the proper size? WORD? instead of byte Title: Picbasic pro source help Post by: leemarrow on April 27, 2005, 06:32:50 18:32 Quote from: nimdonia is 25000 = 2.5 volt? check tht first yes, 2,5 volt is 25000 i have found my error :D the formula to calculate temperature is wrong :rolleyes: |