Ep. 15: 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.

Download the student worksheet that goes with this lesson.

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.

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Ep. 14: Guesstimations

When it's too hard to count 'em up and too much time to calculate, it's time to guesstimate the answer. I use this technique all the time to "ball park" my answer so I know if I've made a mistake ...Read More

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