Homopolar Motor With Five Speed Manual Stick-Shift  This video
show how to build a homopolar motor that's really
different...it's got a five-speed shifter!  The homopolar motor
is the simplest design electrical motor in the world. It uses a
battery, a neodymium magnet and a wire. Usually, either the
copper wire or the magnet rotates. In this case the battery
rotates.  Here, I've used a battery, a neo magnet, and a copper
wire wrapped around a coat-hanger. The coat-hanger acts as both
electrical connection and support for the hanging battery. Coins
are used to change speeds of the rotating "battery-plus-change"
motor.  I've been recently told that US coins, being non-
magnetic, won't work for this Instructable. (Sorry about that!)
Perhaps the US coins could be glued together to make it work.
Furthermore, some Canadian pennies are magnetic and some are
not.  You can order the BEST neodymium super-magnets from K&J
Magnetics here.  See more of my homopolar motor videos at :
Check my other comments about this in th