Burglar Alarms

Burglar alarms not only protect your stuff, they put the intruder into a panic while they attempt to disarm the triggered noisemaker. This experiment teaches students how to make simple burglar alarms, which are really clever switches, out of their basic circuit equipment.

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This particular burglar alarm is an NC (Normally Closed) switch, and kids will learn how to wire it up in a circuit and pull the trigger.