In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: Yes, pulsin will give you time for 1 revolution in 10 uSec units. So 6,000,000 / (time in 10 uSec units) = RPM The math is going to be a little trick, but will be the most accurate. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=199012#m199082 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)