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Digital Heliograph
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Historical Heliograph Illustration
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Liquid Crystal Shutter
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My Digital Heliograph Signal from 19 Miles
My Science Fair Trifold
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Sight Calibration, Aiming and Tracking
Testing Accuracy
The Arduino Code
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Digital Heliograph
My Science Fair Trifold
You must have a trifold. This is what the judges see.
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