

Here's how to make an optical theremin-like from stuff you can get at Radio Shack. As it's exposed to light it will produce different distortion - Link.
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Here's how to make an optical theremin-like from stuff you can get at Radio Shack. As it's exposed to light it will produce different distortion - Link.
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Ah, Forrest Mims would love to see 21st century kids using 555 timer ICs from Radio Shack.
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Mims is still alive and kicking, he was featured in the book "Makers" by make magazine. Cool circuit.
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So I got the RS Optical Theremin working, but for some reason my volume phototransistor burns out or something after a day. It still reacts to the light on the pitch phototransistor, but it is not as loud as it is the first day a built it because of that cell. I built two and this happened both times.
Any thoughts as to why this may be happening?
Thanks
-Alice
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