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Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
book

Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

by Steven Lawrence Fernandes, Tim Cox
April 2018
Beginner content levelBeginner
552 pages
13h 58m
English
Packt Publishing
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

Using just the PCF8591 chip or adding alternative sensors

A circuit diagram of the PCF8591 module without the sensors attached is shown in the following diagram:

Circuit diagram of the PCF8591 module without sensor attachment

As you can see, excluding the sensors, there are only five additional components. We have a power-filtering capacitor (C1) and a power-indicating LED (D2) with a current-limiting resistor (R5), all of which are optional.

Note that the module includes two 10K pull-up resistors (R8 and R9) for SCL and SDA signals. However, since the GPIO I2C connections on the Raspberry Pi also include pull-up resistors, these are not needed ...

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Publisher Resources

ISBN: 9781788629874Supplemental Content