They got those cards, you can record a 20s. message on them. Just tear one down, and record no-no-cat.What if we just rig something so it plays like every half hour or so? Really loud too, to make the postal workers wonder wtf is going on
The circuit is going to be a little thing like a postage stamp. A tiny piezo for a speaker and a small 1.5v watch battery.
The only moving part is the little slip-strip that triggers the battery. Problem is mailing this without giving some security scanner an alert.
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Can't mail shit like this these days,
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