Mark, I am not familiar with "ADC's anti-aliasing filter" can you explain? thanks Andre -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf Of Mark Rages Sent: Tuesday, June 19, 2007 7:49 PM To: Microcontroller discussion list - Public. Subject: Re: [pic:] Software low pass filter any idea? On 6/19/07, Andre Abelian wrote: > Hi to all, > > I am using external 13 bit ADC witch originally won't necessary > to go that high resolution "not under my control" now the result > I am getting is noisy numbers are going high and low. what I did is > reading it 10 times then I add them together then divide it by 10. > It helps but one of our engineer asked me to add software low pass > filter witch I am familiar with it. Reading 10 times values are up to 15 point > different. > My question is do you have any experience or know how software LPF work? > any link or info will appreciate. I searched piclist.com not enough info > I found to understand what to do. > What kind of anti-aliasing filter is on the ADC? Regards, Mark markrages@gmail -- Mark Rages, Engineer Midwest Telecine LLC markrages@midwesttelecine.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist