Mint Tin Personal Alarm
by x2Jiggy.com
Combine a mint tin, piezo siren and some basic components into a personal alarm that's both functional and visually pleasing. This design involves connecting a 12 volt A23 battery to a piezo siren through a toggle switch and a tact switch. The toggle switch is used to arm the device (preventing accidental activation) and the tact switch activates it.
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