You can show a step down Permanent Magnet Motor as well as cogging effect=20 due to iron and magnets. Not so difficult, a PWM circuit to emulated PM driver. ----- Original Message -----=20 From: "IVP" To: "Microcontroller discussion list - Public." Sent: Saturday, May 18, 2013 4:08 AM Subject: Re: [EE] Uses for stepper motors >> More uses randomly thought up: >> * Line following robot. >> * Make something that will open/close your windows to regulate >> room temperature. Actually this one's been on my mind, didn't try >> it yet though. * Make a truly automatic guitar tuner. Piano tuner if >> you're up to it. > > Yes, they're all good, and would be an opportunity to introduce them > to subjects like PID (whatever happened to fuzzy logic ?) > >> Basically anything to do with XY motion, or robotic/automation, or >> something you find annoying to do and would rather have a machine >> do it for you > > One project I'd like to do is a feeder for my scrollsaw, for spirals > and other programmable profiles. They can be done by hand but > it's a real chore and sometimes you just don't want "character by > imperfection" > > Joe > > --=20 > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist >=20 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .