Highly recommended. Look at it. Marvel. > http://www.holmea.demon.co.uk/GPS/Main.htm I saw one "homemade" GPS receiver design in the early days of GPS. The author was subsequently employed by (AFAIR) Trimble :-). I went to look at this one not believing it would be a low level creation and feeling it was a waste of time regardless. While from almost any practical point of view it IS a waste of time and of vast amounts of effort, it is utterly utterly superb. The lengths he had to go to, the effort expended, the things he had to get right to make it work at all and more are staggering. A relatively simple circuit overall. More or less understandable. Even his overall descriptions are understandable if you don't think too too hard as you skim through them. An utter joy to see somebody doing something like this in this day and age. Somewhat akin to climbing Everest in a small party with a minimum of Sherpas :-) (Maybe not quite up to climbing K2 standard). Russell On 5 October 2011 02:59, M.L. wrote: > Link from a friend: > http://www.holmea.demon.co.uk/GPS/Main.htm > > Homemade GPS receiver. Haven't had time to read it yet but looks very > interesting. > > -- > Martin K. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .