December 2009
Intermediate to advanced
457 pages
12h 49m
English
Content preview from Practical Arduino: Cool Projects for Open Source HardwareBecome 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 6. Security/Automation Sensors
Security system sensors such as motion detectors, reed switches, pressure mats, glass-break detectors, infrared beams, and conductive film, can be very handy for all sorts of things including home automation systems, interactive art installations, and even security systems!. Almost all security system sensors provide a simple switched output that changes state based on whether the sensor has been tripped, which means that, when connected up in a circuit, they behave just like a switch that is activated automatically. That makes them extremely easy to connect to an Arduino to read their status.
However, things are not quite as simple as they may first appear.
Most security sensors provide a "normally closed" ...
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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.