Page 157 - 15 Dangerously Mad Projects for the Evil Genius

Chapter 10 ■ Laser Voice Transmitter 135

Figure 10-21 Wiring the transmitter

If you now turn on the receiver, you will Step 8. Box the Transmitter
probably find that when you shine the laser onto
Now that we are confident that everything works,
the diffuser you get a bit of feedback howl. If this
we can box up the transmitter in much the same
happens, it’s a very good sign and you can try out
way we did the receiver.
the project properly by taking the transmitter away
Start by laying out the components in the box
from the receiver and setting it to point at the
(Figure 10-22). In this case, the laser module will
diffuser. This normally requires careful alignment.
stand vertically against one of the plastic pillars to
The author found it useful to prop things up with
which the lid screws attach. A hole will be drilled
stacks of coins, taken from the pockets of his
in the bottom of the box for the light to emerge.
minions (the Evil Genius does not carry cash).

Figure 10-22 Laying out the transmitter