They Like It
Gyroscope by degroof is licensed under the Attribution - Creative Commons license.
© 2010 by degroof
Instructions
In addition to the listed parts, you'll probably need a few pieces of hardware for counterweights (to balance out the difference between the weight of the motor and the weight of the batteries). I used a nut and few washers I had lying around.
Print flywheel and frame. Insert nails into holes in frame, glue in place and cut off excess. Attach flywheel to motor. Strap motor into inner disc. Strap batteries and counterweights to disc. Wire one lead of motor to batteries. Assemble frame - there are indentations where the nail points go. Attach remaining wire to batteries.
It's a bit difficult to get the counterweights arranged just right. Wiring is pretty much just wedging one lead against either end of the battery stack.
The motor I used was pulled from a toy gearmotor assembly (Solarbotics GM17 solarbotics.com/products/gm17). I left the pinion gear on the shaft to make mounting easier.
