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Unread 11-01-2008, 15:35
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Range on the IR board?

Our IR board stops getting signals from the remote we're using at a pretty short distance. Is this how the board actually is or does our remote kinda suck? Is there a way to boost reception of the IR signals using something cheap / free? If it does have a fairly limited range, how does FIRST expect us to send signals across the playing field?
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Unread 11-01-2008, 16:45
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Re: Range on the IR board?

Don't you have a pile of unused remotes around? Just keep trying them till one seems to work well.

Make sure the batteries are the proper ones (alkaline?) and are fresh. "Heavy Duty" batteries are NOT as good as alkaline.
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Unread 12-01-2008, 08:59
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Re: Range on the IR board?

Quote:
Originally Posted by FIRST IR User Guide
If you have successfully trained the FIRST IR board, but find that it does not respond when the remote is positioned more than a few feet away, the remote is probably not using a 38KHz modulation frequency. To solve this, switch to a different remote (or setting on a universal remote) and re-train.
http://www.usfirst.org/uploadedFiles...%20_121007.pdf
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Unread 12-01-2008, 09:13
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Re: Range on the IR board?

You can always try and add a few more IR LEDs and bump up the voltage.
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Unread 12-01-2008, 10:37
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Re: Range on the IR board?

Ours works from up to 30ft with a random remote we found lying around (samsung I think). This was also with 2 other remotes pointed right at it with random buttons being pressed.

There are no rules regarding the remote, so you can beef it up however you want.
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Unread 13-01-2008, 12:30
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Re: Range on the IR board?

ours works from across the room (maybe 20 or 30 feet... even with stuff between our remote and sensor)

it mainly depends on your remote. i had an old remote to an old tv that would work even with a hand over the ir emitter and the remote pointing in the wrong direction. sadly the remote was lost and i couldnt find it.

my recommendation is go to a local goodwill store and buy a few remotes. thats what my team did. The first remote we tried wasnt usable with the ir board so we had to go back and get a new one (the goodwill was near our build space)
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Unread 13-01-2008, 20:44
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Re: Range on the IR board?

we got 60 feet through 2 panes of glass
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Unread 13-01-2008, 22:39
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Re: Range on the IR board?

To the team claimed 60 ft range on the IR board, can you post the brand of remote control used?

My team 2528 bought a generic GE remote control, and we are getting marginal reception at 30 ft. The overhead fluorescent light (normally found in school rooms) also played a big role in affecting the IR reception.

I wonder if the more expensive universal remote control has better range...

Thanks,

team 2528
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Unread 13-01-2008, 23:38
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IR board?

Does the kit come with IR board? If it is not where can I buy the IR board?
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Unread 14-01-2008, 07:53
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Re: Range on the IR board?

Chu,
The board was mailed to all teams before Christmas.
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Unread 14-01-2008, 12:31
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Re: Range on the IR board?

I think the range depends on the remote.

also, if you did not get a board during Christmas break, then check who you team shipping contact was in your TIMS. Then, if you still need one...


http://www.usfirst.org/uploadedFiles...Update%202.pdf

http://www.usfirst.org/uploadedFiles...Parts-RevB.pdf

Last edited by keen101 : 14-01-2008 at 15:16.
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Unread 14-01-2008, 13:08
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Re: Range on the IR board?

The range we got with a normal universal remote was at least 30 feet. It does of course depend on your remote and it helps if the code your sending is repeating.
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Unread 14-01-2008, 14:20
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Re: Range on the IR board?

We used a small Sony remote that I had not used in a long while (the cable box controls that TV for me).

Ours worked from across the room ... and at nearly every angle to the receiver. There does appear to be a dead spot (or more accurately dead PLANE) at a right-angle to the sensor ... it works from front and rear, but not too good (or at all) from the side.

We're not sure how much of it is reflected, since it was inside the classroom. We're planning an outside remote control tryout to find the one with the longest range, just from the unused remotes that we have around our houses.

and yes, fresh batteries are a must.
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Unread 14-01-2008, 17:30
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Re: Range on the IR board?

Quote:
Originally Posted by da_dove View Post
To the team claimed 60 ft range on the IR board, can you post the brand of remote control used?

My team 2528 bought a generic GE remote control, and we are getting marginal reception at 30 ft. The overhead fluorescent light (normally found in school rooms) also played a big role in affecting the IR reception.

I wonder if the more expensive universal remote control has better range...

Thanks,

team 2528
yes, and the offical measurement is 58 feet, but still more than enough.

we used a radioshack 3 in one remote with some lithium batteries. we used the directional pad in testing.
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Unread 15-01-2008, 07:25
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Re: Range on the IR board?

For those of you that may be testing in classrooms or other school areas, be aware that many schools have installed cameras for security that contain IR illuminators. If your camera phones are sensitive to IR, point them at the cameras to check for IR emissions. The illumination is unmodulated but may affect the AGC in the pickup.
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