November 2014
Intermediate to advanced
400 pages
7h 30m
English
Content preview from The TAB Book of Arduino Projects: 36 Things to Make with Shields and Proto ShieldsBecome 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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CHAPTER 15
Spectrum Display
This project uses an Arduino to control a multicolor LED matrix, displaying the real-time frequency spectrum of an audio signal (Figure 15-1).
FIGURE 15-1 Audio spectrum display.
This project would make a nice addition to any audio system. Displaying the spectrum of an audio signal involves splitting the signal into a number of frequency bands and measuring the magnitude of the signal at each band. The human ear (or, rather, the young human ear) is usually assumed to be able to detect sound waves between 20 Hz and ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.