February 2009
Beginner
128 pages
2h 45m
English
Content preview from Getting Started with ArduinoBecome 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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Testing Your Breadboarded Circuit
Now connect the board to your breadboard by running a jumper from the 5 V and GND connections to the positive and negative rails of the breadboard. If the green PWR LED turns off, remove the wires immediately. This means there is a big mistake in your circuit and you have a "short circuit" somewhere. When this happens, your board draws too much current and the power gets cut off to protect the computer.
Note
If you're a concerned that you may damage your computer, remember that on many computers, the current protection is usually quite good and responds quickly. Also, the Arduino board is fitted with a "PolyFuse," a current-protection device that resets itself when the fault is removed.
If you're really paranoid, you can always connect the Arduino board through a self-powered USB hub. In this case, if it all goes horribly wrong, the USB hub is the one that will be pushing up daisies, not your computer.
If you're getting a short circuit, you have to start the "simplification and segmentation" process. What you must do is go through every sensor in the project and connect just one at a time.
The first thing to start from is always the power supply (the connections from 5 V and GND). Look around and make sure that each part of the circuit is powered properly.
Working step by step and making one single modification at a time is the number one rule for fixing stuff. This rule was hammered into my young head by my school professor and first employer, Maurizio ...
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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.
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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.