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Printablesfjkraan

Portable Sun Dial

Based on a description in an old (1984) education magazine I build a virtual replica of a portable sun dial which was inspired by medieval portable sundial from Canterbury. What I originally planned to do was make a temporal or 12-hour…

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63

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15

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Printablesfjkraan

Zuse inspired Z1 logic gate demonstration set

This is my interpretation of the operation of basic logic gates as they could be used in the Zuse Z1 programmable calculators. The information is from pages 216-2217 in the book described below. The illustrations are from the patent Zuse…

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39

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10

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