April 2018
Beginner
552 pages
13h 58m
English
book
Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
by Steven Lawrence Fernandes, Tim Cox
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
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Motor speed control using PWM control
Currently, the Rover-Pi robot motors are controlled by being switched on and off; however, if the robot is moving too fast (for example, if you have fitted bigger motors or used higher gearing), we can make use of the ENA and ENB input on the controller. If these are set low, the motor output is disabled, and if set high, it is enabled again. Therefore, by driving them with a PWM signal, we can control the speed of the motors. We could even set slightly different PWM rates (if required) to compensate for any differences in the motors/wheels or surface to drive them at slightly different speeds, as shown in the following diagram:
A PWM signal controls the ratio of the ON and OFF times
A PWM signal is ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.