how to get maximum value(Vmax) of sine wave??

[tenaja]

...And while I have the "floor" - I can't understand why everyone isn't moving over to the PIC 18F series. They have much more capabilities, are better in almost every way, and don't cost much more. ?????

I can give you one good answer. Most folks can't even manage to read a 120 page datasheet, much less one that is over 2 or 300 pages.

[rmteo]

It is not so much whether they manage to read the datasheet, as to whether they even bother to download and absorb it. Maybe they should have to take an oath such this before they ask the question.

I hereby solemnly affirm that:
a. I have downloaded the datasheet for the device in question.
b. I have read (and have done my utmost to comprehend) the relevant section and/or sections that pertain to my question.
In witness whereof, I humbly submit my question, and where it is deemed to be helpful, I will quote the relevant section of the datasheet.

[Charles Linquis]

Look at the MAX function - it is in the manual.

Vmax = Vmax MAX ADCvalue

As the ADC value rises the value of VMAX rises. When the ADC value falls, the value
of Vmax stays the same. If you sample for more than a full cycle VMax has the peak value of the sine wave.

If you are looking at the sine wave cycle-by-cycle, you will have to clear Vmax at zero crossing.

[donatelo]

thnx for the reply....
i'll figure it out tomorrow...