April 2014
Beginner to intermediate
392 pages
14h 57m
English
Content preview from Make: More ElectronicsBecome 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 30. Experiment 30: Hidden Detectors
Hall-effect sensors are all around you. When you close the lid of your laptop, probably a Hall sensor under the plastic skin of the case detects the action and puts the computer into sleep mode. When you switch on your pocket camera, a Hall sensor detects that the lens is fully extended. Hall sensors are inside your hard drive, detecting the rotation of its motor and controlling its speed. They’re in the electronic ignition of your car—and in the car’s door lock, which switches on the interior light when your key turns. Your modern washing machine may use a Hall sensor to determine if the door is closed. Similarly, your microwave oven.
Each sensor generates a tiny electric current in response to a magnetic ...
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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.