In SX Microcontrollers, SX/B Compiler and SX-Key Tool, edgellmh wrote: I want to determine whether house power is on at a remote location. The microcontroller whose job it is to do this will be powered by a UPS. Presumably I need some kind of relay but it is unclear to me what kind of relay and how to sample the ac power. If I use a power cube to put a low voltage onto a relay then what I am detecting is whether or not the power cube is working. Is there a way to directly sample the AC power? ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=268432 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)