In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Sawmiller wrote: another thing you can try is placing a 1000uF cap between Vss and Vdd on you test board.... ( thanks gunther) it smooths out the pulses from the power supply somewhat if you do a search from this forum over the last year you will find a number of ideas on this subject... i had too as i had the exact same problem.. search is in the top right corner... best of luck dan ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=103063#m103092 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)