Fabricio, thanks for your help. since I use 2 bytes (13 bit) I will go with 13 or 16 bits. thanks Andre -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf Of Marcos Fabricio Bezerra Sent: Tuesday, June 19, 2007 12:12 PM To: Microcontroller discussion list - Public. Subject: Re: [pic:] Software low pass filter any idea? Hi, Andre. I advice you to use a digital implementation of an IIR filter. How many bits do you really need? Fabricio. ----- Original Message ----- From: "Andre Abelian" To: "Microcontroller discussion list - Public." Sent: Tuesday, June 19, 2007 3:36 PM Subject: [pic:] Software low pass filter any idea? > 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. > > thank you for your help > > Andre > > -- > 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 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist