November 2012
Intermediate to advanced
90 pages
1h 43m
English
Content preview from Atmospheric Monitoring 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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Chapter 4. Gadget: LED Sensitivity Tester
Before building and using the LED photometer, we first need to figure out exactly which wavelengths of light each of our LEDs is sensitive to. Otherwise, we won’t be able to get good data with the photometer. Unfortunately, no LED datasheet that we’ve ever seen troubles itself with listing LED input wavelength, because LED manufacturers generally don’t think of their products as input devices. Fortunately, we can determine input wavelengths with a gadget we can build ourselves: the LED sensitivity detector.
Mission: Inputtable
Your mission, should you choose to accept it, is to determine the peak input wavelength for a series of LEDs. You will do this by shining every wavelength of visible light, from 350–700 ...
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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.