Page 66 - 15 Dangerously Mad Projects for the Evil Genius

Chapter 4 ■ Mini Laser Turret 45

Step 10. Fit the Project into a Box is essentially connected in parallel, as shown
Figure 4-20.
Because the joystick has quite a wide range, this
is a difficult project to box. However, fitting the
battery, the stripboard, switch, and joystick into Theory
a box without a lid will at least neaten up the
project and provide a firm base for the joystick When it comes to making things move, servo
(Figure 4-19). motors are great. They are easy to use, quite low
power, and only require one wire to control their
A hole is drilled for the switch, and another
position. In this section we learn a little more
for the cable to the servo turret. The joystick frame
about how to use Servo motors.
is glued to one side of the box. The adventurous
Evil Genius may even decide to provide a lid for We also take a look at the 555 timer IC, which
the box. is used to generate the pulses for the project. This
timer chip is extremely versatile and it is useful to
know how to use it.
Ideas
Servo Motors
The Evil Genius might like to make more than one
turret connected to the same joystick. That way, Servo motors are most commonly used in radio-
when the joystick is moved, all the turrets move. controlled model vehicles.
This is very easy to do. Each turret servo assembly

Figure 4-19 Boxing the project