You shouldn't have to look far for the lawnmower engine cutoff as all modern lawnmowers have a "deadmans" bar that needs to be held in before even starting the lawn mower. I'm still wondering, what is the make and model of the engine?? Mike ----- Original Message ----- From: "Barry Gershenfeld" To: Sent: Friday, August 10, 2001 12:11 AM Subject: Re: [PIC]: Building a Servo > >:( The motor I am using (and no I can't change the kind of motor being used! > >:) )uses a "coil flying by a magnet really quickly" approach to develop the > >spark. > > > > That's a "magneto", though I rather like "coil flying by > a magnet really quickly" (CFBMRQ?). And I used to believe > that it was the "really quickly" part that caused the spark. > But one day I pulled the flywheel off the lawnmower and > lo and behold underneath was a set of breaker points. > So I guess the magnet's not quick enough. V must be > equal to di/dt or something :) Maybe it's not that way > on all magnetos, but find the coil and see if it doesn't > have another connection. That one should be a low > voltage control. > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu