Page 114 - Programming the Raspberry Pi Getting Started with Python

Figure 11-8 Wiring the display
To the remaining RCA plug I attached the male-to-male RCA adapter. The power leads are then
twisted onto the power leads of the same color from the battery clip and inserted into the screw
terminals of the plug adapter. If your battery box is terminated in a plug, you can snip off the plug and
strip the insulation of the wires. These wires can then be used as if they were the leads from the
battery clip. Either way, the project wiring is summarized in Figure 11-9.

Figure 11-9 Wiring diagram
One consequence of this wiring arrangement is that the display will still be connected to the battery,
even if you unplug the power on the RaspiRobot- Board. For this reason, use the battery clip on the
battery box to turn the robot on and off.

NOTE More adventurous readers might like to add the luxury of an on/off switch.
The screen is attached to the chassis by means of adhesive putty. This is not a good permanent
solution; some kind of plastic bracket might be better.
Step 3: Update the Software
The updated hardware needs an update to the software to accompany it. The program can be found in
the file 11_02_rover_plus.py. You also need to arrange for this program to start rather than the