All, I have written an Excel spreadsheet that acts as a timing delay calculator. It works similarly to, and was modeled after, the online version by Nikolai Golovchenko available on the piclist website. Is there anyone on the list that would be willing to check it out to see if it functions properly? I am planning on writing an application, as a contest entry, that runs on my PALM IIIc that will perform this function. I would like to make sure the algorithm is correct before committing it to code. If anyone is interested, let me know, and I'll forward a copy to you to try out. Thanks and Regards, Jim -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist