You don't need the 555 timer - use software timing loops. ************************************************* Roy Hopkins rdhopkins@ihug.co.nz ************************************************* > It's visible at cowshed.8m.com/trigger any comments are appreciated Mr > Prosser has already advised that I need the 20pF caps, and some other > parts that I might not need... --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.560 / Virus Database: 352 - Release Date: 8/01/2004 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics