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the pot works, but i dont think it has enough ohms to cover a wide enough range to change the shape drastically. since the motor is only 6 volts and i have a 25 ohm resistor. radioshack sells 5k ohm potentiometers, but don't think that would work at all. the other stuff works.

Hey im doing a project for school, and i need/want to make a spirograph. but i have one problem i can only seem to make 1 shape. I think its due to either the helicopter blades spinning too quickly or the 25 ohm pot not doing that much to the speed. all i want it to do is maybe make 3-4 diff...