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Unread 01-06-2008, 02:23 PM
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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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Unread 01-06-2008, 02:27 PM
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Thumbs up 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.
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Unread 01-06-2008, 02:35 PM
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Re: IR Interference

Quote:
Originally Posted by neutrino15 View Post
More specifically, how to build a reflecting rig that allows 360 degree control.
How about:
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Unread 01-06-2008, 02:36 PM
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Re: IR Interference

Quote:
Originally Posted by TomZ View Post
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?
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Unread 01-07-2008, 06:21 PM
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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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