Infrared Led Link Cables
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Infrared Led Link Cables
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Bluefire


Member


Joined: 18 Jan 2004
Posts: 186
Posted: 28 Jan 2004 05:23:55 pm    Post subject:
Ive come up with an idea, make a infrared link cable, think about it, using a chat program you could easily cheat with a friend in a class if u both had infrared transmitters/recievers attached to your calcs, well i like the idea and would like some help designing one, so uhm, im sorta good at circuits and would like help making a schematic for one
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DigiTan
Unregistered HyperCam 2


Super Elite (Last Title)


Joined: 10 Nov 2003
Posts: 4468
Posted: 28 Jan 2004 06:19:29 pm    Post subject:
Not a bad idea! There are a few IR link designs floating around out there. I'm told the biggest design difficultly is bit timing. A bonus of having an IR system on your calc is being able to capture signals from TV remotes, remote keyboards and other devices.
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Darth Android
DragonOS Dev Team


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Joined: 31 May 2003
Posts: 2104
Posted: 28 Jan 2004 07:55:41 pm    Post subject:
yes, and they cost $50 up because you have to buy a PIC micro controller to make sense of what the calc sends, as it doesnt send over one line and recieve over teh other (that would be too easy)
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DigiTan
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Joined: 10 Nov 2003
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Posted: 29 Jan 2004 12:01:25 pm    Post subject:
Most AVR micro controllers retail for under $7.50. The downside is that --like most embedded micro devices--they require an expensive development boards for reprogramming. It is however possible to build a low-cost board using Radio Shack components.
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X1011
10100111001


Active Member


Joined: 14 Nov 2003
Posts: 657
Posted: 29 Jan 2004 04:51:01 pm    Post subject:
Quote:
using a chat program you could easily cheat with a friend in a class if u both had infrared transmitters/recievers attached to your calcs

Wouldn't that be a little noticable though?
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shadowing
Powered by 64


Calc Guru


Joined: 06 Jan 2004
Posts: 1002
Posted: 29 Jan 2004 05:18:16 pm    Post subject:
Who cares? At least, it's easier to chat with your friends then with a very long link cable.

Question: What's the range of an infrared link?

Does anyone have a rough idea of building this?
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DigiTan
Unregistered HyperCam 2


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Joined: 10 Nov 2003
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Posted: 29 Jan 2004 05:51:31 pm    Post subject:
Most of the present IR link plans claim to go as far as 30 feet, which isn't an unreasonable claim. It's basically got the same limits as a typical TV remote (works best in the dark, can bounce off white/shiny objects). It all depends on the sending/receiving LEDs--among other things.

Last edited by Guest on 29 Jan 2004 05:52:30 pm; edited 1 time in total
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Bluefire


Member


Joined: 18 Jan 2004
Posts: 186
Posted: 29 Jan 2004 07:14:43 pm    Post subject:
Wacko so uhm, do any of u have like a site with maybe infrared transmitter/reciever schematics that i could probably use to build 1 of could any of u build one and let me buy it Razz
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Adm.Wiggin
aka Tianon


Know-It-All


Joined: 02 Jun 2003
Posts: 1874
Posted: 29 Jan 2004 07:19:55 pm    Post subject:
go to ticalc.org, go to the file archives, go to the text, go to the hardware schematics, IR Link

i think that will lead you there... if not, just make an inference about where to go.
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X1011
10100111001


Active Member


Joined: 14 Nov 2003
Posts: 657
Posted: 29 Jan 2004 07:55:27 pm    Post subject:
shadowing wrote:
Who cares? At least, it's easier to chat with your friends then with a very long link cable.

But if you're using it to cheat on a test, you wouldn't want the teacher to see it.
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Darth Android
DragonOS Dev Team


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Joined: 31 May 2003
Posts: 2104
Posted: 29 Jan 2004 08:55:41 pm    Post subject:
actually, if you can get teh parts small enough, you might be able to embed it into the calc....drill a little hole on the side for the LEDs
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X1011
10100111001


Active Member


Joined: 14 Nov 2003
Posts: 657
Posted: 29 Jan 2004 09:49:00 pm    Post subject:
But they would have to be pointed at each other
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Darth Android
DragonOS Dev Team


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Joined: 31 May 2003
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Posted: 29 Jan 2004 10:17:44 pm    Post subject:
ok...good point.
*thinks how akward it would look if one calc was upside down*
the teacher would be hard to fool....
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DigiTan
Unregistered HyperCam 2


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Joined: 10 Nov 2003
Posts: 4468
Posted: 29 Jan 2004 11:00:41 pm    Post subject:
I might try to work out a prototype within a week or two, but I can't guarntee any reliability (my apartment/lab is all components and no test equipment Wacko ). It's really best to use an existing design. That way, if you meet a stranger with one they'd have sporting a chance of being compatible.
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shadowing
Powered by 64


Calc Guru


Joined: 06 Jan 2004
Posts: 1002
Posted: 29 Jan 2004 11:38:07 pm    Post subject:
Hey I have an idea. You know that cradle the Ti-Keyboard has? Why not embed the IR into it and fake it out the IR is part of the calc?
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Jeremiah Walgren
General Operations Director


Know-It-All


Joined: 24 May 2003
Posts: 1937
Posted: 30 Jan 2004 07:35:22 pm    Post subject:
http://sami.ticalc.org/ has schematics, if memory serves...
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shadowing
Powered by 64


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Joined: 06 Jan 2004
Posts: 1002
Posted: 30 Jan 2004 11:15:46 pm    Post subject:
The link is great. Hope some of you guys could build it. It'd be fun to use it link with others during class and play some link game that does support it.
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Darth Android
DragonOS Dev Team


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Joined: 31 May 2003
Posts: 2104
Posted: 31 Jan 2004 12:17:33 am    Post subject:
DigiTan wrote:
That way, if you meet a stranger with one they'd have sporting a chance of being compatible.

the IR links have to be matched to the same frequency. thats why you could carry a working pair, then b4 class, give one to your firend for use, then get it back.


just wondering, why was shadowing warned (he's at 10%)?

Last edited by Guest on 31 Jan 2004 12:19:09 am; edited 1 time in total
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Arcane Wizard
`semi-hippie`


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Joined: 02 Jun 2003
Posts: 8993
Posted: 31 Jan 2004 05:01:00 am    Post subject:
You can click on anybody's percentage (see the underlined part?) and see their warning adjustments' history/log.
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Darth Android
DragonOS Dev Team


Bandwidth Hog


Joined: 31 May 2003
Posts: 2104
Posted: 31 Jan 2004 09:55:02 am    Post subject:
gah, ok.

shdowing: you could play any game that supports linked play...the point is to be a wireless link cable
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Infrared Led Link Cables
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