In SX Microcontrollers, SX/B Compiler and SX-Key Tool, leon_heller wrote: A former colleague of mine used a 555 timer to create a signal for a perimeter wire for a robotic lawn mower he was designing. I think the frequency was 500 kHz. He didn't have any problems detecting the signal with some simple hardware connected to a PIC. leon ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=371404#m371547 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)