June 2016
Intermediate to advanced
272 pages
5h 4m
English
Content preview from Arduino Project Handbook
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Project 19: Laser Trip Wire Alarm
In this project, you’ll create a simple laser trip wire alarm.
PARTS REQUIRED
• Arduino board
• Breadboard
• Jumper wires
• Photoresistor
• Piezo buzzer
• Green LED
• 10k-ohm resistor
• Laser pen
You’ve probably seen a movie where a valuable item is protected by a grid of laser beams. The beams look cool and seem pretty high-tech, but the principles behind them are actually very simple.
HOW IT WORKS
When the laser pen shines on the photoresistor, the green LED will light up to signify that the circuit is ready. ...
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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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