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Space Music

Space Music

Read about Dan's planetarium synthesizer.

About 38 years ago I built a synthesizer for my planetarium and some laser shows I did. My school had no budget for the planetarium, so I had to make things for myself.

I used a calculator key pad, resistors, a 555 chip and an old speaker. I put "rubber dam" from Edmond's Scientific over the speaker stretched tight. I glued a piece of the first surface mirror on the rubber. Shining the laser at the mirror, I could project shapes on the dome.

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