October 2014
Beginner
432 pages
10h 9m
English
Content preview from Robot Builder: The Beginner’s Guide to Building RobotsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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7. Harnessing Infrared
There is an invisible light that surrounds us—infrared, or IR. Its wavelength is below the visible spectrum, meaning that we cannot see this light without the help of technology.
The upside to this limitation is that we can stutter the light to transmit information. The 1s and 0s of digital communication represent a switch being turned on and off, and that works the same way with IR communications.
It is, however, a limited form of communication for the simple fact that the standard IR frequency is 38KHz, or 38,000 pulses per second, and most IR-decoding devices ignore all other frequencies of light. To make matters worse, the light doesn’t pass through walls or other obstructions, limiting it to line-of-sight applications ...
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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.