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 Raspberry Pi (RPi) platform. The chapter begins by describing some equipment that can be very 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 RPi, 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 in Chapter 9 to build circuits that interface the RPi to analog sensors.

Equipment Required for This Chapter:
  • 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

Get Exploring Raspberry Pi now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.