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NextPerception
Member
Joined: 08 Sep 2003
Posts: 203
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 Posted: 02 Mar 2004 05:16:25 pm Post subject: |
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DigiTan wrote: No radio? That's just weird!
I like the calc-LAN idea. Wasn't TI marketing a calculator network system for education a few years back? Whatever happened to that project?
they are selling it for a lot of money. go check out the ti calculator store |
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shadowing
Powered by 64
Calc Guru
Joined: 06 Jan 2004
Posts: 1002
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| Posted: 13 Mar 2004 05:07:56 pm Post subject: |
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| Guess this is abandoned. |
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patori
Newbie
Joined: 17 Mar 2004
Posts: 39
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| Posted: 24 Mar 2004 03:32:38 pm Post subject: |
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| yup. btw. nice avatar. yoh. |
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DigiTan
Unregistered HyperCam 2
Super Elite (Last Title)
Joined: 10 Nov 2003
Posts: 4468
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| Posted: 30 Mar 2004 01:59:02 am Post subject: |
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I finally found the Sami encoder at a Radio Shack for $3.29. It's really cool and alot smaller than I expected. So far it works with my TV remote pretty well. You can even bounce the signal off walls and ceilings--so I'm guessing the calcs wouldn't even have to be in the same room if you're lucky. The Sami design looks like a winner, so I'll try that version first. 
Last edited by Guest on 03 Apr 2004 07:12:17 pm; edited 1 time in total |
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DigiTan
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Joined: 10 Nov 2003
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| Posted: 30 Mar 2004 05:00:28 pm Post subject: |
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Quote: Cancel that last post
That's just an expression. Do we have be so literal-minded here? ;)
[ONTOPIC]
Right now I'm compiling a bill of materials for the link. So far it looks like it'll cost between $10.00 and $15.00 (including the case). Maybe less if a cheaper decoder can be found. |
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Keith Pierce
Advanced Member
Joined: 02 Feb 2004
Posts: 411
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| Posted: 02 Apr 2004 10:24:34 am Post subject: |
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| what parts do I need to make iinfra-red links. i would like to make one to be able to read with my tv. I am in the process of making a remote for the type of tv i have but i need the links. Any help will be greatly appreciated. |
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Brazucs
I have no idea what my avatar is.
Super Elite (Last Title)
Joined: 31 Mar 2004
Posts: 3349
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| Posted: 02 Apr 2004 03:09:53 pm Post subject: |
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Instead of an infra-red cable, do what I did.... use cell phones! (not sound waves  )
I took this old set of two-way walkie talkies. But these walkies are different, once you're connected to someone, it's a two on two conversation, like a telephone kinda.... I got it at Radio Shack for like 20 bucks 3 years ago...
You see, on the side of the thing, they have a headset input where the calc-to-calc link fits perfectly!!! So, I connected them both and went about 10 feet away.... IT WORKED!! for a while at least... you have to be pointing to each other.
So you see, most cell phones or chordless phones have a headset input, so theoretically, you could call anyone up and say "plug in your calc" and I suppose it'd work... Now there's an idea, and I have both a cell and a headset phone, I'm gonna go try it.
::looking for calc::
argh... I let someone borrow my other calc  . Someone, try this!
Last edited by Guest on 03 Apr 2004 01:17:44 am; edited 1 time in total |
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DigiTan
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| Posted: 02 Apr 2004 03:53:07 pm Post subject: |
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Quote: what parts do I need to make iinfra-red links. i would like to make one to be able to read with my tv. I am in the process of making a remote for the type of tv i have but i need the links. Any help will be greatly appreciated.
I got the Radio Shack [276-640] "IR receiver module." It filters out other lights and cuts out the 38kHz pulses so you don't have to build your own filter.
It looks like the Sami link can double as a link or a tv remote. It can also control vcrs, cd players, sat receivers, audio equipment, etc. Most tv brands either use the RC5(pulse position, aka "Manchester" encoding) or RECS80 (pulse width) format. There are other standards, but they're hardly ever used. Sami's programs can do both formats, plus a few others.
Radio/Phone Link:
Does anybody remember the name of that website that used to sell TI Phone/Radio links. I can't find it. (It was something like "Atomic Calc" or "Fusion Calc") |
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Ray Kremer
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Joined: 16 Feb 2004
Posts: 237
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| Posted: 03 Apr 2004 12:09:38 am Post subject: |
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brazucs16 wrote: Instead of an infra-red cable, do what I did.... use sound waves!
I took this old set of two-way walkie talkies.
You see, on the side of the thing, they have a headset input where the calc-to-calc link fits perfectly!!! So, I connected them both and went about 10 feet away.... IT WORKED!!
That's actually quite clever, though it has absolutely nothing to do with sound waves. |
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Brazucs
I have no idea what my avatar is.
Super Elite (Last Title)
Joined: 31 Mar 2004
Posts: 3349
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| Posted: 03 Apr 2004 01:04:48 am Post subject: |
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Ray Kremer wrote: brazucs16 wrote: Instead of an infra-red cable, do what I did.... use sound waves!
I took this old set of two-way walkie talkies.
You see, on the side of the thing, they have a headset input where the calc-to-calc link fits perfectly!!! So, I connected them both and went about 10 feet away.... IT WORKED!!
That's actually quite clever, though it has absolutely nothing to do with sound waves.
Radio waves... whatever.
The good thing about this is that it's free (well, you call them in your free minutes) and that you could play with anyone...
But wouldn't the delay in the call mess it up a lil' bit?
Last edited by Guest on 03 Apr 2004 01:16:32 am; edited 1 time in total |
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NextPerception
Member
Joined: 08 Sep 2003
Posts: 203
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| Posted: 03 Apr 2004 07:00:17 pm Post subject: |
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| were did you get these walkie talkies and what is the brand name of them? Quote: cancel that post I took care of it
Last edited by Guest on 03 Apr 2004 07:13:16 pm; edited 1 time in total |
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DigiTan
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Joined: 10 Nov 2003
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| Posted: 03 Apr 2004 10:17:16 pm Post subject: |
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Quote: Quote: cancel that post
I took care of it
Not again!!! 
Anyway, I'm still in the process of programming one of my AVRs for TV code learning. It's about 40% done and I might have it ready in the morning. I'll let everyone know how it goes..
Last edited by Guest on 03 Apr 2004 10:27:08 pm; edited 1 time in total |
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Blackwolf189
Newbie
Joined: 09 Apr 2004
Posts: 30
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| Posted: 11 Apr 2004 12:02:44 am Post subject: |
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| i started thinking about this though i have absolutely no experience in electronics other than working with motors. but what i was thinking was have a small black square with a antennae sticking out of it where all the electronics would go. Then u just give 1 to someone and select send recieve and your on your way. however after reading the post i realize it wouldn't be so small. so my idea is to either have it molded to the bottom of the calc (i want to be able to detach it so i can transfer files to anyone wirelessly). wouldnt it be great if we could just call up TI and tell them to send us a calculator that was wider and deeper. then we could install anything we wanted 2. |
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Blackwolf189
Newbie
Joined: 09 Apr 2004
Posts: 30
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| Posted: 12 Apr 2004 08:34:21 am Post subject: |
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| what is the pic controller supposed to do? convert the output of the calc to infared format? |
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DigiTan
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| Posted: 12 Apr 2004 01:46:37 pm Post subject: |
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Yeah, the PICs main job is take data from the 2 link lines and convert it to 1 IR signal. Also, the Sami version provides some sort of handshaking.
Also, I finished the TV code-learner but I'm having some power source problems where the AVR prevents the IR receiver from working properly. So far it works for Phillips (RC5) devices. I'll finish the rest of the hardware this summer probably. |
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Blackwolf189
Newbie
Joined: 09 Apr 2004
Posts: 30
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| Posted: 12 Apr 2004 06:05:28 pm Post subject: |
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| where do you go to learn how ti ouputs data and how to convert that to a infared signal. |
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DigiTan
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Joined: 10 Nov 2003
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| Posted: 12 Apr 2004 09:00:13 pm Post subject: |
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Here's an excerpt from Alan Bailey's "Guide to TI-86 Ports."
Quote: ----------------------------------------------------------------------------------
port 7 - Link Port
----------------------------------------------------------------------------------
Write -
11....00
bits 2 & 4 - 1: makes red wire inactive
0: makes red wire possibly active if other calc says so
bits 3 & 5 - 1: makes white wire inactive
0: makes white wire possibly active if other calc says so
Read -
0000....
bit 3 - 1: white wire current stopped because this calc said so
0: white wire possibly active
bit 2 - 1: red wire current stopped because this calc said so
0: red wire possibly active
bit 1 - 1: white wire active
0: white wire inactive
bit 0 - 1: red wire active
0: red wire inactive
Notes -
This is the same as port 7 on the TI-85. Basically, to make certain wires active,
do the following:
EX: ;these are the values
ld a,%11010100 ;White wire ON $D4 ;you should use
out (7),a
ld a,%11000000 ;White wire ON, Red wire ON $C0
out (7),a
ld a,%11101000 ;Red wire ON $E8
out (7),a
ld a,%11111100 ;nothing ON $FC
out (7),a
...Also, they tell us that zeros "overpower" ones. So if calculator "A" sends a "1" on a wire, and calculator "B" sends a "0" on the same wire, both calcs will interpret it as a "0".
Anyway, the main thing to remember is that both wires will need to send their data at the same time. Since we're using "open air" to send the infrared instead of a fibre-optic thread, they will have to "share" the IR transmitter/receiver somehow. (I've seen a few designs connect 2 LEDs directly to the ports but this doesn't work).
Representing both wires:
Bi-Directional Wires
One popular way to do this is to double the IR bit rate. So for example, if both wires were on, the IR would send a "1" followed by another "1." This is a good strategy for low-speed transfers because the LED can still flash rapidly enough to work at the x2 rate. It might not work for the regular 9600bps because your LED would have to flash 19,400 times a second (too fast!). The Sami design seems to work around it, but I haven't studied it very closely so that's all I can say. It's slower, but you can use the wires as inputs or outputs.
Uni-Directional Wires
Another way is to use 1 wire as a permanent output and 1 as a permanent input. This strategy avoids the x2 bit rate problem. But most games and progs use both wires as inputs and outputs though, so it might not be compatible with all linked games. |
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shadowing
Powered by 64
Calc Guru
Joined: 06 Jan 2004
Posts: 1002
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| Posted: 21 Apr 2004 05:37:28 pm Post subject: |
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| It is still abandoned. Maybe something else? A wireless card supporting 802.11b? |
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leofox
INF student
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Joined: 11 Apr 2004
Posts: 3562
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| Posted: 22 Apr 2004 10:17:29 am Post subject: |
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what if i just take the 2 antennaes from an old cordless house phone, and connect them onto an half calc-to-calc cable? Do you guys think that'l work? It would be awesome, 'cause the range is over 150 feet! And i already have the phone, i hope my parents let me wreck it... they still want me to use it, thought you can't type numbers anymore, beacuse you can accept calls.... A wireless ticalc cable would be way cooler, and useful  |
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JeePee
Member
Joined: 18 Jan 2004
Posts: 181
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| Posted: 22 Apr 2004 03:12:08 pm Post subject: |
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Well, I'm making one for my own now. I'm gonna check how many it costs tomorrow (and probably buying it soon). But I think it's rather impsossible to build it inside the calculator case (I won't put it in my TI83+ anyway )
Hope it'll work good  |
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Calculator Modifications => Calculator Hardware, Electronics, Robotics
