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The Digi Comp II is a replica of a binary mechanical computer that can perform basic mathematical functions. As shown by Windell Oskay of Evil Mad Scientist Laboratories at Maker Faire Bay Area 2011, it uses billiard balls as its counters and performs calculations in real time as the balls make their transit down a ramp with specially places guides and levers.

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Becky Stern

Becky Stern

Becky Stern ( is a DIY guru and director of wearable electronics at Adafruit. She publishes a new project video every week and hosts a live show on YouTube. Formerly Becky was Senior Video Producer for MAKE. Becky lives in Brooklyn, NY and belongs to art groups Free Art & Technology (“release early, often, and with rap music”) and Madagascar Institute (“fear is never boring”).