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Make Your Own PCBs with EAGLE: From Schematic Designs to Finished Boards by Simon Monk

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CHAPTER 9

ImagesA Raspberry Pi Expansion Board

In this chapter, we will look in detail at another of the author’s open-source hardware (OSH) projects, specifically, version two of the RaspiRobot board (www.raspirobot.com). This board (Figure 9-1) is designed to allow a Raspberry Pi single-board computer to be powered by batteries and also to control two direct-current (dc) motors. The board has a number of interfaces including to an HC-SR-04 ultrasonic range finder, a 5V I2C interface designed to easily accommodate displays and other I2C devices, and a pair of open-collector outputs.

FIGURE 9-1   The RaspiRobot board version 2.

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