with a servo extension cable, soldering its
white/yellow and black wires to each contact
For the LED, wire another servo cable to
the LED, black (ground) side to its cathode,
which is indicated by the shorter leg and flat
part of the plastic. Glue the LED into the hole
in the top of Digger’s collar, where its leash
used to connect (Figure H).
To help you during assembly and in the
future, label the cables and plugs of all your
peripherals using a label maker, or just masking tape and a marker. Label each servo by
its position (right/left) and each sensor by
its type. For Digger, we have a left servo,
right servo, speaker, and LED.
For the camera, unscrew its case and
remove its internal workings. Doing this with
any peripheral device saves room, making
it easer to fit. Use hot glue to lightly secure
the camera inside the toy shell, with the
lens pointing out of the nose hole (Figure I).
Don’t use too much glue, as you may want
to realign the camera or reuse it later in
a different project.
5. Final assembly.
Determine the mounting position of the robot
controller and battery pack. With Digger, its
belly area was the perfect width to host the
EZ-B Controller with the battery underneath.
Refer to the EZ-B manual to determine the
connection points for each servo and sensor.
Digger’s left servo plug is connected to
pin row D14 and the right servo is connected
to pin row D13. The speaker signal and ground
are connected to D7. The LED anode is connected to the signal wire and the cathode
to ground on pin row D6. Keep track of all of
these connections; you’ll need to know them
when configuring the software.
Once the connections are completed,
carefully reassemble the shell, trying to
protect the controller connections and any
other fragile parts (Figure J).
To give your robot a unique look, you can
paint the shell. Scuff the smooth finish with
sandpaper and then clean it to allow the paint
to bond. I painted over the Playskool doggy
tag with red paint, then replaced it with an
EZ-Robot label from our trusty label maker.
You can also paint the entire shell a custom
color. Bring it to a paint store and ask them
what type of paint and process they suggest.
6. Connect to the PC.
Right-click the Bluetooth icon that should
appear in the System Tray and select
Add Device to bring up a listing of nearby
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