In SX Microcontrollers, SX/B Compiler and SX-Key Tool, davehein wrote: Bob, It sounds like the SX is working correctly, since it works OK with a switch driving the input pin. The problem must with the BS2. You should verify that the BS2 is driving the output pin correctly by checking it with a voltmeter or put an LED with a series resistor on the output pin. Dave ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=135496#m135619 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)