Mike Singer wrote:
> There is a formula F =  1 / (R * C)

There is, but if you're looking for the 3dB rolloff frequency then it's

  F = 1 / (2 * Pi * R * C)

******************************************************************
Embed Inc, Littleton Massachusetts, (978) 742-9014.  #1 PIC
consultant in 2004 program year.  http://www.embedinc.com/products
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist