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Logic gates introduction through Portal 2 Perpetual Testing Initiative

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Published on May 16, 2012

Demonstrating the concept of digital circuits (AND, OR, NOT, NAND, NOR, and some flipflops) through Portal 2's recently released puzzle editor.

This is probably my only video so far that contains narration that was neither meticulously scripted beforehand, nor edited afterwards. There was very little editing to this video, but due to numerous mishaps I had to redo everything several times, literally. Puzzles, playtesting, narration, encoding.
The resolution is just 640x360, because even with that resolution CamStudio could only record at 15-20 FPS rate. A higher resolution would have meant even worse frame rates for the recording. I still have just a Intel GMA circuit for a 3D "card", and the Source recorder cannot be used with the puzzle maker.

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