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Jacob's ladder behind plexiglas.

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A hand-cranked electrical generator.

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Piloting a rover with a dataglove.

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The 'glove is wired up with accelerometers and probably conductive thread.

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Hand-cranked magnetic RF detector, tuned to a local radio station.

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Ooblick: equal parts cornstarch and water.

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It does weird stuff when you subject it to low frequency vibrations.

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An American field crypto unit from World War II.

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American field crypto gear.

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Captured German Enigma machine, also from World War II.

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Where's the punctuation?

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Usage instructions.

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HacDC's table.

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Kits for the electronics classes.

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A vintage ham station built around a spark gap transmitter.

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An old-school ham ticket.

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Dry cell batteries.

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Back when they still used water pipe grounds.