In SX Microcontrollers, SX/B Compiler and SX-Key Tool, lmolter wrote: Bean, I think I finally get the whole pwm thing. Hopefully I didn't embarass myself too badly in my posts . So, it's on to Plan B: Dual 555 as pulse-width modulators - one for the fast speed and one for the slow. I'll use the i/o pins from my footswitch controller to switch the speeds through logic gates. This is actually a better approach because I can trim the speeds with small pots. Thanks to everyone who replied. Larry ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=258538#m258776 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)