In SX Microcontrollers, SX/B Compiler and SX-Key Tool, eagletalontim wrote: it's the crystal that says 75.990Z on it. Do you have to match the speed of the crystal in the program or can you run at a slower pace? I just put the program back to 4Mhz still running the external crystal and it heated up just as fast. The SX does not get hot at all....just the 7805 voltage regulator. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=317003#m317028 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2009 (http://www.dotNetBB.com)