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 7
Secret Knock Lock
This project is also similar to the two preceding projects. However, instead of using a radiofrequency identification (RFID) tag reader or keypad, this version of the lock uses a secret knock (Figure 7-1).
FIGURE 7-1 Secret knock door lock.
The idea is that you train the lock with a certain pattern of knocks, and then, when it hears the correct knock, it releases the door. This type of lock should not be considered to be as secure as the preceding two lock projects but is a great bit of fun.
Parts
Just as with the ...
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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.
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.