Part I: Basic Hacks, Tools, and Techniques
Reinstall the camera on top of the pole and reattach all of the wiring. You
now have a video periscope that will allow you a unique view of traffic!
Test out the camera assembly
Take the entire assembly out to the car, but do not attach the trunk
mount—you first want to see if everything works. Plug in the video camera
to the LCD TV set and plug the power cable into the power supply. Connect
the power supply to the 12V cigarette lighter and see if there is a video pic-
ture on the LCD TV.
Close the trunk of the car over the cables and connect the camera. Plug in
the cigarette adapter and look for video. Don’t go for a ride just yet—you
will need to check the weatherproofing at the enclosure and tighten all of
the tie wraps.
Adjust the Madol antenna mount to give you the view you want. It can be
oriented forward to get a peek at traffic up ahead, or backward to see what
(or who) is behind you.
Once you have the camera working, you may want to experiment with dif-
ferent configurations. Here are four examples.
Multiple cameras can be attached
around the car. Simply purchase and
build additional cameras and hous-
ings and add a multi-pole switch to
rotate the power and video among
the different cameras. Figure 6-21
shows an example of how multiple
cameras can be connected.
If you want to be able to rotate the camera left and right, you can use a
model airplane servo. Pick up a medium-size servo and mount it to the pole
and the camera. You will need some sort of control circuit to send position
information to the servo; a simple circuit that accomplishes this is shown
in Exhibit C. The circuit consists of an LM55 timer IC, a few resistors and
capacitors, a transistor, and a potentiometer. Build the circuit and mount
it in a small box with a large potentiometer sticking out. Add a knob that
allows rotation of the camera to be controlled from the front seat of the car.
Color LCD TV
12V from car
Figure 6-21: Multi-camera setup
1/21/2002 12:48:41 PM