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neutrino15 06-01-2008 15:23

IR Interference
 
We were discussing the IR sensor today. More specifically, how to build a reflecting rig that allows 360 degree control. Then we came to the topic of interference. We understand that we can use a tube to shoot our signal in a straighter line, but what happens if another team's remote has the same codes ours does? What happens if an audience member builds and brings an ultra tv-b-gone??

More though, multiple teams having the same codes, and using the same buttons.. I think first should give us all remotes at the competitions! Or do they have some other plan?

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TomZ 06-01-2008 15:27

Re: IR Interference
 
If you think about it a remotes work on thousands of different frequencies, plus a remote has about 20 buttons, there is a 1 in 5000 chance that one of the teams will use that frequency, plus only six teams are on the field. That narrows it down alot, I would personally say, don't worry about it. But possibly bring a second remote and it only takes a few seconds to reprogram the IR sensor.

Nate Laverdure 06-01-2008 15:35

Re: IR Interference
 
Quote:

Originally Posted by neutrino15 (Post 669911)
More specifically, how to build a reflecting rig that allows 360 degree control.

How about:

Tottanka 06-01-2008 15:36

Re: IR Interference
 
Quote:

Originally Posted by TomZ (Post 669919)
If you think about it a remotes work on thousands of different frequencies, plus a remote has about 20 buttons, there is a 1 in 5000 chance that one of the teams will use that frequency, plus only six teams are on the field. That narrows it down alot, I would personally say, don't worry about it. But possibly bring a second remote and it only takes a few seconds to reprogram the IR sensor.

who says that team won't just jam each other's IR frequency with an Ir that just sens all of the frequencies out?

mneary 07-01-2008 19:21

Re: IR Interference
 
Infrared remotes do not work on thousands of frequencies; basically they are all in the same infrared region. They are modulated with a frequency, which is usually 38KHz but 36KHz and 40KHz are also popular.

There are a lot of distinct key codes, but this assumes that your receiver isn't receiving interference from somebody else's remote while you're sending.


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