wow thats realy cool!!!
I dont understand what is making the marker spin like that?
where are the magnets?
what king on magnets were used?
whats that a 6 rpm motor?
how about a tutorial?
Thanks, everybody!
Iceman--There is a large magnet at the end of the wiper arm that goes back and forth underneath the Ouija Bd. It's a 2 inch bar magnet I got at Harbor Freight. There are also two small magnets stacked on top of each other mounted UNDER the moving pointer. These I got at Lowe's--they are discs about the size of a dime, and 1/4" thick. I guess it has something to do with the changes in the magnetic field as the arm moves the pointer across the board that makes it spin.
The two magnets on the pointer need to be exactly in the middle of the bottom of the pointer, letting the pointer balance on these magnets with none of the 3 legs touching the board. I also glued a piece of one of those "magic slider" things on the bottom of the magnet that touches the board. This helps it slide easier.
It all kind of happened by accident when I built the first board.
The motor is a 5 RPM motor.
I guess I can do a tutorial sometime. Would have to be after this Halloween, though.