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Old 05-04-2013, 10:55 PM #1
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Default First Spirograph

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 shapes nothing fancy

http://laserpointerforums.com/attach...1&d=1367708101

edit: also im using a 5mw laser not that it matters
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First Spirograph-dscn0861-1-.jpg  



Last edited by poparms; 05-04-2013 at 10:57 PM.
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Old 05-04-2013, 11:59 PM #2
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Default Re: First Spirograph

If you are only getting one shape, then one of the following is happening:

1) one of your mirrors is exactly flat
2) one of your mirrors is not spinning
3) your pot is not doing anything to the speed of the motor

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Old 05-05-2013, 01:10 AM #3
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Default Re: First Spirograph

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.
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