June 2013
Intermediate to advanced
224 pages
6h 40m
English
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CHAPTER 5Sensor Projects
SENSORS TURN REAL-WORLD measurements into electronic signals that we can then use on our Arduino boards. The projects in this chapter are all about using light and temperature.
We also look at how to interface with keypads and rotary encoders.
Project 10Keypad Security Code
This project would not be out of place in the lair of any Evil Genius worth their salt. A secret code must be entered on the keypad, and if it is correct, a green LED will light; otherwise, a red LED will stay lit. In Project 27 we will revisit this project and show how it cannot just show the appropriate light but also control a door lock.
COMPONENTS AND EQUIPMENT
Unfortunately, keypads do not usually have pins attached, so we will have to attach ...
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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.