In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Bongo wrote: I would think that the back emf caused by your transport's starter motor is going to cause you far more grief than the reg running a little warm. Would suggest a bipass diode as a bare minimum to some supply filtering. bongo ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=144373#m145306 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)