What is this thing?

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[Solved] Anyone know what this is? They are embedded in the sidewalks around the city (programming.dev)

submitted 3 weeks ago* (last edited 3 weeks ago) by catch22@programming.dev to c/whatisthisthing@lemmy.world

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Any ideas?

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[–] chemical_cutthroat@lemmy.world 30 points 3 weeks ago

Yeah, this. You can step on one, and it's fine. Just don't step on two and complete the circuit, it's like boofing the third rail.

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