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130 15 Dangerously Mad Projects for the Evil Genius

In both cases, the material is just glued in place.
As an alternative, you could use a headphone
socket in place of the speaker.
The stripboard should be fixed in place using
glue or self-adhesive pads. The box that the author
used was just the right width to hold the battery in
place, so there was no need to secure it.
All that remains is to fit the switch, attach the
battery, and screw down the lid of the box. The Figure 10-13 The completed receiver
final boxed receiver is shown in Figure 10-13.
going into a laser module. The schematic diagram
for this is shown in Figure 10-14.
The Laser Transmitter
More information on how this works can be
The laser transmitter will take the signal from a found in the “Theory” section at the end of this
microphone and amplify it to modulate the power chapter. But the basic idea is that the signal from

Figure 10-14 The schematic for the laser transmitter