The rover also optionally provides a platform for a wireless web cam or a second Android phone with wireless web cam software on it, as shown in Figure 5-1. The author used an app called IP Camera from the Android Market, which converts the phone into a web cam that acts as a server over WiFi. You can then go to a URL in your browser and see the image from the web cam.
The outputs of an IOIO board are not powerful enough to drive electric motors, so a motor control breakout board is used. This little board (Figure 5-3) allows bi-directional control of the motors. That is, you can control both the speed and direction of two separate motors.
Figure 5-4 shows the schematic diagram for the project. This time, for obvious reasons, we will use batteries rather than a power adaptor.
The IOIO pins for the motor control are selected so that we can use header pins to ...