At 07:29 AM 9/23/99 -0400, you wrote: >The basic idea behind a brushless dc motor is that it regulates its own >speed. Trying to control the speed externally without messing w/ the >electronics inside is not going to give you a very good/nice range. Not all brushless motors have the controller internal. From his questions, I believe he was talking about controlling a brushless motor with external electronics. To see what I mean, visit these sites: http://www.maxcim.com http://www.aveox.com These motors are quite a bit more powerful than your Pentium fans . Several of the controllers available for the above motors use PICs. Maxcim has "sensorless" controllers in development, if not already deployed. Andy ================================================================== Eternity is only a heartbeat away - are you ready? Ask me how! ------------------------------------------------------------------ andy@rc-hydros.com http://www.rc-hydros.com - Race Boats andy@montanadesign.com http://www.montanadesign.com - Electronics ==================================================================