Home-made Mat Switch

Simple and Elegant

Whenever someone steps onto this simple device, its inner circuit is completed and the device is switched “on”. Easy to make, although difficult to use (for example, once the thing is turned on, it won’t turn off until someone stomps on it, again).

On a separate note: supermarkets’ automatic doors (or indeed ANY automatic doors) use radar detectors and/or pressure mats to detect a passerby’s presence. They are, I believe, among the most common switches (I think they qualify as switches, no?).

— Christine


1 comment so far

  1. mdgross on

    I don’t understand why it stays on after someone steps off the mat? (“difficult to use because …”)

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