/diy/ - Do It Yourself

Anonymous Sun Feb 23 22:55:50 2020 No.1772359 [View]
File: 8 KB, 400x400, tegaki.png [View same] [iqdb] [saucenao] [google]

>>1765937
How about capacitive sensors in the chairs themselves? So they'd pick up on a person's presence by the radiated 60Hz noise if he's within 5cm. An open-gate FET with a filter on it would work well. Possibly with an AC signal generator nearby with another capacitive plate to ensure that the person is at a reasonable potential, but if you did that you'd want it to be at.

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/diy/ - Do It Yourself

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