Page 94 - 15 Dangerously Mad Projects for the Evil Genius

CHAPTER 7

Laser-Grid Intruder Alarm

PROJECT SIZE: Medium

SKILL LEVEL: ★★★✩

LASER BEAMS LINE THE ENTRYWAY to the Evil
Genius’ Lair (Figure 7-1), forcing the secret agent
to bend and arch through the beams in a series of
agile moves. With skills honed by years of Twister
and limbo dancing, the agent navigates his way
through the beams. Suddenly an alarm sounds and
vertical doors slam to the ground, trapping the
agent. The Evil Genius triumphs again.
This is a working alarm. It uses a laser beam
that bounces between mirrors attached to two walls
that face each other. For instance, the entrance to
the Evil Genius’ Lair. When the beam is broken, a
buzzer sounds.

Note that the more ingenious agent will work
out that they can defeat the alarm by attaching a
flashlight to the sensor, or indeed just turning it
off. Figure 7-1 has also been Photoshopped to
show the path of the beam.

The Evil Genius also likes to amuse himself by
Figure 7-1 Laser beam alarm
holding “Laser Limbo” competitions at his sadly
under-attended parties. To shouts of “How low can
you go?” the Evil Genius limbos under the beam.
The wise minion will hide when the buzzer
sounds.

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