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1. benj11+(OP)[view] [source] 2024-11-28 11:36:49
I seem to recall reading somewhere that 'everything' is a thermometer, on the basis that many things behave differently at different temperatures.

You can also use an LED as a light sensor.

and I also came across a YT vid of a console that used a piezo electric speaker for motion sensing.

I wonder if you could use a track pad to pick up sound.

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