CHAPTER 4Interfacing Electronics

This chapter introduces you to the type of practical electronics that you need to work correctly and effectively in interfacing electronic circuits with the Beagle boards. The chapter begins by describing some equipment that can be helpful in developing and debugging electronic circuits. It continues with a practical introductory guide to circuit design and analysis, in which you are encouraged to build the circuits and utilize the equipment that is described at the beginning of the chapter. The chapter continues with a discussion on the typical discrete components that can be interfaced to the general-purpose input/outputs (GPIOs) on the Beagle boards, including diodes, capacitors, transistors, optocouplers, switches, and logic gates. Finally, the important principles of analog-to-digital conversion (ADC) are described, as such knowledge is required to interface to the Beagle board ADCs.


  • Components for this chapter (if following along): The full list is provided at the end of this chapter.
  • Digilent Analog Discovery (version 1 or 2) or access to a digital multimeter, signal generator, and oscilloscope.

Further details on this chapter are available at

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