Thanks for the link Tony. Unfortunately those plans are for a serial UIRT. I'm looking more specifically for USB. Some history. I built a couple of WinLIRC circuits (http://winlirc.sourceforge.net/
) and had one connected to a PIII 550. Using Girder with the Igor plugin, it has worked great and flawlessly. I built a second one for experimentation and tried it both with a 733 and 866 PIII and have been having flawed communication. I figured that if there are too many services running in the background, there could be missed communication from the COM port and figured a USB IR Receiver might perform better (Note all three computers are running Win2k Pro). But after reading that link you provided, I'm wondering now if there is induced noise in the room where both those computers (733 and 866) sit which is giving me the problems. I might try that noise filter and see if that helps.
As for my post, Mr "M", your post made it apparent that I had to explain my justification into why I wanted to take the project on, both economically and "spiritually". The reason for posting here is the simple fact that it is supposed to be a DIY forum (and tweaker forum) and I shouldn't have to justify the reasons for wanting to build a project such as this or any project for that matter, especially on a forum of this nature. If I had asked this same question in the HTPC forum, then I could understand and accept a response such as the one you gave (which I was originally going to do).
Enough of all that, let's get back to DIY'ing. Again I ask the question:
Has anyone tried to build a USB IR Receiver for remote controlling their computer? Or more specifically have tried either one of the circuits I have linked above?