I used to make and sell these machines, 20 odd years ago. They work very well.
Although limited with the visual patterning, they are a wonderful relaxation/trance aid.
A few tips on manufacture:Use an old 70's 33/45/78 turntable and strip all the unnecessary parts off it...only the table, motor and switching needs to stay (
couple of $ at a flea market).
Plastic plumbing pipes and bends can be used to construct the bulb hanger. The wiring can be integrated into the power source.
A base can be constructed out of cheap 2x1" wood to house the turntable and light source assembly.
A wooden (
or similar) stabilizing ring can help with slotted strobing card cylinder.
Varying the size of the strobe cutouts can vary the visual patterning.
Switching between 33-45-78 rpm can cause very effective visual transitions. A real 'wooah' effect.
If possible, use a variable voltage switch instead of the manual/linkage switch for rpm transitions.
I used to really enjoy the field of red spikey tomatoes...
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