In short, if you are wondering if an InfraRed device is working, you can actually see InfraRed using a digital camera. It even works with a low caliber cell phone digital camera.
Put the IR device in transmit mode, aim the digital camera pretty much head on to the IR port and look at the camera's viewfinder or video screen. Like magic you can see the unseen. You can even photograph it for posterity like I did and attached to this post.
Besides checking remote controls, I have used it to see if my PDA was transmitting via the IR port. You might be in a room full of laptops and wondering which one is trying to connect to your laptop.
Don't use your cell phone to call tech support, use your cell phone's camera to "see" the IR. It will make you feel like a high tech Sherlock Holmes. Techno fun and useful too. Enjoy!
__________________________
Mike Roberts is a bewildered Linux Journal Reader Advisory Panelist.
| Attachment | Size |
|---|---|
| seeInfraRed.jpg | 37.67 KB |
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December 2009, #188
If last month's Infrastrucuture issue was too "big" for you then try on this month's Embedded issue. Find out how to use Player for programming mobile robots, build a humidity controller for your root cellar, find out how to reduce the boot time of your embedded system, and if you're new to embedded systems find out the basics that go into one. You can also read about the Beagle Board, the Mesh Potato and a spate of other interestingly named items. And along with our regular columns don't miss our new monthly column: Economy Size Geek.
Really techie
On November 28th, 2007 k.sangeeth says:
It was great to see the response from my friends when I told them this.
__________________________But I was just wondering .. of all the logic behind this.
Is it because the "digital cam" converts the rays invisible to normal human eyes to some visible color?
It will be good if anyone can clarify.
Sangeeth Keeriyadath
www.sangeek.com
IR viewing with digital cameras
On January 6th, 2008 Johnma says:
>Is it because the "digital cam" converts the rays invisible to normal human eyes to some visible color?
No, it's because the image sensor in the camera is sensitive to wavelengths outside the range visible to humans -- in this case, the IR emissions from your remote.
Handy, also, for keeping an eye on your front/rear yard at night -- any ordinary digital camera/webcam will give you a nice black-and-white picture (in the dark) if you illuminate the area with an IR floodlight.
J.
query
On February 9th, 2008 k.sangeeth says:
It is true that the "image sensor in the camera is sensitive to wavelengths outside the range visible to humans" .. but the display of the camera is fed with different wavelength than the sensor received ..
I feel the wavelength is manipulated to be displayed on screen ..
what say u?
P.S. IR floodlight seems to be a very cool idea .. thanks
----------
Regards,
__________________________SanGEEK
Sangeeth Keeriyadath
www.sangeek.com
Cool
On January 10th, 2008 Mike Roberts says:
I like your idea of using an IR floodlight to keep an eye on things via a webcam. I've already got a webcam watching portions of my backyard but of course I can only see things in the daylight. I'll be shopping for an IR floodlight now to try out your idea.
Thanks for the idea!
__________________________Mike Roberts is a bewildered Linux Journal Reader Advisory Panelist.
That's the awesome!
On November 20th, 2007 Shawn Powers says:
That is incredibly cool! Just so cool.
I want to tell everyone I know, and no one else I know will care!!!
__________________________Shawn Powers is an Associate Editor for Linux Journal. You might find him chatting on the IRC channel, or Twitter
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