Search for IrDA in Topics


Can I use my IRDA port on my computer for a TV-B-Gone like divice?

I have an IRDA port (the infrared serial port) on my laptop and I was wondering if there was a program that sends out IR signals to turn off TVs just like the TV-B-Gone. If not, is there a program that can record IR signals from this IRDA port and play them back later? This way I can just record the TV-B-Gone's signals and play them back later.

Question by physics_dude    |  last reply


How can I use the native IR port on my Dell to capture IR TV remote signals?

I liked this article about capturing IR signals, but what if I already have an IR device on the side of my Dell Latitude (D610, if it matters)? Is there some software that can tell the port to listen for remote control signals and save them as raw data?

Question by V-Man737    |  last reply


Palm Universal Wireless Keyboard disassembly?

I'm toying with the thought of adapting my Palm Universal Wireless Keyboard to work with Bluetooth.  Currently, it sends irDA data at 9600 baud.  This should be decodable using an xmega's usart which has an irDA mode.  One could even bypass the IR emitter, as there are exposed contacts in the base where one can catch the signals prior to irDA transmission (at 1.5V high  / 0.5V low levels). My question is: Does anyone know how to disassemble the keyboard?  I don't see any screws anywhere.

Topic by arpruss    |  last reply


Using the IRDA port on my toshiba satellite 2520cds

I got this old gem a month ago from a guy that recently and obviously needed a new one, but it worked this long surprisingly for power points. I must admit that it runs decently fast with xp and not having turned anything but system restore off. It's got a 333mhz amd 3D processor which I want to try upgrading with a k6 down the road as it IS removable. 96mb of ram and a lousy 4gig hd that slows the whole system down. But that is barely important. I had a swell idea of utilizing the irda port on the back for controlling it via a tv remote or any I might have kicking around which I have plenty of. Also, I wanted to be able to CONTROL my tv, vcr, dvd player, ect with it in itself aswell.Google didn't help me much this round as apparently there is software (which I did try) avalible but it's meant for home made or certain commercial infrared ports that plug in via serial, usb and perhaps parellel that I saw. I also saw a hint of what seems to be that the built in irda sensor in most laptops aren't able to receive commands from most remotes for learning or controlling it due to the filtered out bands. But they are supposedly capable of sending commands just fine. Now this is a OLD OLD laptop and there could be a chance that it can receive the commands too? Even still, you could pull it apart and modify the sensor to accept signals couldn't you? I'm looking for something to do with this laptop and this seems perfectly suitable for it as the screen is older and has that "motion blur" effect to it and so makes playing nes games a bit hard :-P. Sorry for the long post, but hey, if someone could help me with this, it would certainly make me happy.

Topic by Punkguyta    |  last reply


xmega event-based IRCOM?

The IRCOM module has a capability of connecting to the uart not through a standard pin, but through the event system. This should make it possible to get IrDA input data for the IRCOM module from a pin other than standard or alternate RX pin for that uart.  But I haven't had much luck getting this facility working.  Has anybody used it?  Google shows nothing. I am actually getting data, but it's not the data that is being sent via IrDA. I think my problem may be that I don't know which events to configure the event system for.  I've tried the following: low level high level (i.e., low level + invert pin) rising and falling edges rising and falling edges with inverted pin With each of these, the IRCOM system does get data to the uart, but the data is not correct (and it's not consistent, either--the same IrDA packet generates different outputs at different times). Is a clock needed? Any thoughts?

Topic by arpruss  


TFDU4100 (PC infrared serial connection)?

I have this infrared transceiver module tfdu411 : data-sheet here the recommended circuit is here well, this circuit is for motherboard with built-in IRDA port , and sure mine does not have one so , can i built this connect this circuit and connect it directly to the serial 9 pins port ? if not , is there any way to connect this module the the PC and build an infrared transceiver ? thank in advance

Question by lu2a  


How can I convert an Atari 2600 Paddle (knob) controller connect to my old laptop

I am working on modding my old laptop inside a destroyed Atari 2600, and i'm running into a problem adapting the Paddle controllers to be visible to Windows, and I don't have the money to buy 2 of the adapters that are sold online. I know it's possible to convert a pentiometer to a PC (which is what's inside the Paddle controllers, a 5v pot) and I just need a way to make it seen on my PC (either as a joypad through software or modification of something) I have plenty of old hardware available, including keyboards (which will be used to adapt the Joysticks) and ball mice (which I think might work properly, Convert the pot movement to X\Y movement, and the buttons to Right\Left click) What I am wondering is if anyone has ever converted these to PC before WITHOUT any sort of fancy, pay for, pre-made adapter. Ports available on my laptop emulator: serial, Parallel, 1x USB, IRDA, Dell Expantion port, 1x PS\2 port (2x if I build an adapter) Thanks

Question by pizzaboy192    |  last reply


Acer travelmate 610 to slimline desktop conversion

Ok i bought this old laptop from ebay for only 15 bucks, and has the following problems 1. Dead screen(but indicators work) 2. The plastic thing and the spring on the switch arent there so i used a cable tie then yank it back and forth to get it to boot 3. Non working battery 4. DVD drive has broken eject mechnism so need to remove drive, open top, load disk, close top then slide the drive back into the comupter(yes the disc drive is removable) ok so what i want to do is to convert it into something like what myles_h did but as a slimline desktop pc meaning vertically and no screen image 1 is a stock pic of the laptop and image 2 is a pic of the idea im going to install windows me after having a look at vcamnowaa(youtube)'s success with said os as seen below or if not i'll install windows 2000 or xubuntu here's some specs: intel pentium 3 windows 2000 pro(i did not get the install cd) 256 mb ram wifi(havent got it working yet) smart card(need this to get past the bios into windows) infrared irda there's a later batch with windows xp and bluetooth btw...

Topic by kbhasi  


Tracking down the speed problems on a laptop.

I've copied the conversation here so we could remove the information from the original instructable's comments.  I figure this would also be of some interest to other forum viewers who may have similar problems, or may be able to chip in. The long and short of it is, 92033 (Ed) has a refurbished laptop that takes literal hours to run a YouTube video on.  I suspect that it's due to a bottleneck with his internet connection.  Here's the conversation thus far: ---------------------------------------------------------------- 92033 (Ed): Thank you kindly for your prompt reply...appreciate it very much. I came across this site by accident in searching for something else and now I'm 'hooked' on it. :) So far I've read over 400 archived posts (whew)...as well as looking at the videos. The videos are somewhat of a problem because this new laptop only has 512 mg memory...LOOOOOng time to load. For example...to watch a SLOW 5-minute You Tube video takes 5-1/2 HOURS to load...keeps showing a couple words at a time...need to get two new memory chips to upgrade to 2gb. Thanks again...Take care. ---------------------------------------------------------------- eddems: I think you're basic download speed is killing ya, not the laptop. check you're speed at Internetfrog.com, if you see the link near the bottom for the old test, run it, I like it's graph of upload and download speed much better. ---------------------------------------------------------------- 92033: Thanks much. I'll check it out. I ordered a 1gb SDRAM Memory chip which just arrived yesterday. Hope this speeds things up a bit. ---------------------------------------------------------------- harley_rly: i hear u man, my computer is hopped up, but i live out in the sticks and have dialup...i only get 24kbps at most :( ---------------------------------------------------------------- 92033: Maybe there's hope for 'us' yet. :-) I phoned Tiger Direct to see cost of an upgrading memory chip to go from 512mg to 1-1/2gb. The guy I talked to suggested I get "PC TUNEUP 2.0" which bypasses the Windows Operating System (I'm using Windows XP Pro) and speeds up the system. I gave it a try and ordered the CD (cost $39.98 - $44.77 postpaid). It hasn't arrived yet but will let you know if it helps as he claims it will. He said that if I just ordered a 1gb memory chip my system wouldn't notice much improvement as it is, but this CD should do the trick. THEN...when I DO order the Memory chip(s) to get total of 2gb my system should zip through like a rocket with the CD just ordered. I'll let you know when I get the CD and about the results. Just hope I haven't thrown forty-five bucks to the wind. Thanks for the contact...appreciate hearing from you. TAKE CARE. ~ ED ---------------------------------------------------------------- Javin007: PC Tune-Up "bypasses the Windows Operating System?" This guy fed you a load of crap. (I work on computers for a living.) PC Tune-Up does nothing more than clean up registries, defragment harddrives (if your OS even needs it, some don't) and keeps drivers up to date (which you could do manually.) That guy's an idiot, or just a liar. Could be both. Unless you were buying PC Tuneup 2.0 from Tiger Direct, in which case we can add "sleazy salesman" to that. What are the specs of the laptop? Go to Start/Run and type in DXDIAG. This will give you a quick snapshot of the specs. Specifically, I'm curious as to the processor speed/type. For a 5 1/2 hour "load" you're more likely looking at network slowdown issues (although 512 megs for XP is WAYYYY too little. I HATE when they put PCs together like that). The RAM upgrade will show significant speed increases, but no improvement with YouTube videos or other downloads. I'm glad to see you are returning the CD. ---------------------------------------------------------------- 92033: Thanks much for your input...appreciate it very much. I checked the DXDIAG as you recommended. Here's the info on it: IBM ThinPad Laptop PC. Model # 23738TU. Intel Premium M 1.70GHZ. 512mb SDRAM Memory chip.Page File- 351mb used,513 mb available. Direct Version-Directx 9.00 (4.09.0000.0904). 512 mb SDRAM-Actual 212 Ram. AVAST Anti-Virus. MS Windows XP-PRO.. Dialup Speed-40kbps. PC2700 SDRAM 512mb Memory Chip installed. I ordered 1bb memory chip which arrived yesterday. Now I have to figure out HOW to remove the bottom of this laptop to install it...lotta small screws on it. :-) Oh, total memory shows 32mb. I don't know if this means much to you. I note your comment that the added RAM memory WONT (?) speed up loading YouTube videos? Is that correct? If so, why not? Thanks again. Take care. ~ ED ---------------------------------------------------------------- Javin007: :) At the risk of boring too many people, here's how memory in a PC works: You have two kinds of memory: RAM, and Hard Drive (technically there's three, as there's also onboard video RAM on video cards, but this is primarily used for 3D video game textures, so can be mostly ignored.) Your harddrive's read/write speed is determined by the type of harddrive it is (most are SATA now) and the rotation speed (most are 7200 RPM, though the specs for your system say yours is only 5400 RPM, but there are 10, 15, and even 20K rpm models out there that are exponentially more expensive.) No matter what, harddrive memory will always be degrees slower than RAM. RAM on the other hand is a small chunk of memory that is "temporary" memory, but very fast. Its speed is determined by the type of RAM (DDR2 being the current common one for notebooks, though DDR3 is available with some motherboards (you can ignore this, though, as you can only handle 2 gigs max of DDR with your system). The motherboard will determine the limits for the RAM that can be installed.) When running *ANYTHING* on your computer, and I mean ANYTHING, it must first be loaded into RAM to be accessed by the CPU. The computer doesn't directly access the harddrive. So this means when your operating system is loaded (Windows XP) the entirety of all running processes for the OS have to be loaded into RAM. Now, Microsoft claims that Windows XP only requires a minimum of 64 megs of RAM, but recommends 128 megs. I challenge you to find me a Windows XP system that only uses 128 megs out of the box. It's not atypical for an XP system to chew through all 512 megs of your RAM, leaving no RAM available for other applications. (Interestingly, the default setup for your laptop is only 256 megs of RAM, yet yours is reporting 512.) What happens when there's no RAM left? The system has to then start trading things into what is called "Virtual Memory." VM is nothing more than a file on the harddrive that will temporarily hold information that SHOULD be in RAM, so the RAM can load more info. For instance, say you have a process that's using RAM, but you want to watch your YouTube video. As the video is ready to play, the system will take the other process's data that's in RAM, write it to the harddrive, load your video into RAM in its place, play a portion of it, write the video to the harddrive, load the data for the process to RAM, let it run for a split second (so it doesn't lock up), write it back to the harddrive, load your video into RAM and play a short clip, etc. etc. etc. The result of low RAM on your system is that applications will open slowly (seconds or minutes, instead of instantly or a few seconds) and they will seem slow to respond, will stutter, etc. With enough RAM, your system can freely open as much as it needs into RAM, and ignore the virtual memory and all the slowdowns that it causes. Now, all of this being said, NO lack of RAM will cause a streaming video to take 5 1/2 hours to play. This is 100% going to be related to your downspeed. (Go to www.speedtest.net and post your results.) RAM slowdowns tend to be most noticeable when shutting down, or starting up your computer, apps will open a little more slowly, they will be slower to respond to button clicks, and video will be very choppy. Anything that is causing a YouTube video to take HOURS will be due to the system simply waiting to get the video in the first place. RAM wouldn't slow down the receiving of the video, but it would cause the video to play weird once it's downloaded. So, all this being said, here's the summary: Your system has a 1.7 Ghz processor, and your RAM is most likely 333 Mhz DDR. If you bump your memory up to a gig, you should see a pretty significant improvement in that your computer will, overall, just "feel" faster. It'll be more responsive, and working with large documents will be many, many times faster. This won't, however, affect your YouTube experience (unless you were getting jittery video often, not the same as "buffering" video.) If you see "buffering" for a long time, your internet connection is your bottleneck. A test on www.SpeedTest.net will likely confirm this. However, if you get decent numbers on SpeedTest, then we could have something more sinister going on, though I suspect you'll find your numbers well below the 1 mbps rate. This brings us to actually changing the RAM. I've been out of the PC hardware realm (professional programmer now) for a few years, and was unable to find a manual for your particular model. However, if memory serves, this image should be a fairly accurate representation of the underside of your system: http://www.javin-inc.com/temp/thinkpad.JPG Don't quote me, but I BELIEVE the red circle will indicate the only screw you will need to remove to access the RAM. There should also be a small clip holding the RAM in place that you'll want to pinch to get the RAM out, and make sure that the new RAM snaps into place. (Sometimes you'll have additional empty RAM beds, and you can just put your RAM in there and end up with 1.5 gigs, but I suspect you'll have two 256 gig chips in there.) ---------------------------------------------------------------- 92033: Phew. Thanks again for your most indepth educational lesson. I appreciate all your help more than you realize. I attempted to answer this last night, typing in more than twice the amount of text as your to me, then suddenly realized there was a glitch and I was on another page...lost it all into the ionisphere. :-( Rather than try to retype all I wrote, I shut 'r down and went to sleep. Now I'm trying to recall all I wrote last night but failed to get mailed. I'm not a traditional typist, rather a one-finger bloke so you can understand the frustration there. I do, however, type at a reasonably good speed. With that said, let's continue. I went to search for Configuration of this IBM Laptop ThinkPad 23738TU and am copy and pasting it here. It's relevant to what I have to say...here it is: ********************************************************************************** Overview Specs Features Includes Warranty Supplies IBM ThinkPad T42 2373 Specifications Part # 23738TU Key Specifications IBM ThinkPAD T42 2373 Manufacturer IBM Manufacturer Part # 23738TU Processor Type Intel Pentium M 735 1.7 GHz Data Bus Speed 400 MHz Cache Memory Type L2 cache Installed Size 2 MB RAM Installed Size 256 MB Technology DDR SDRAM Memory Speed 333 MHz System Type Notebook Storage Hard Drive 40 GB, 5400 rpm Storage Controller Type IDE Optical Storage Type DVD ROM Read Speed 24x (CD) / 8x (DVD) Display Type 14.1" TFT active matrix Graphics Processor / Vendor ATI MOBILITY RADEON 7500 Video Memory 32 MB Max. Resolution 1024 x 768 Audio Output Type Sound card Audio Codec AD1981B Compliant Standards DirectSound, AC '97, SoundMAX Telecom Modem Fax / modem Max. Transfer Rate 56 Kbps Protocols & Specifications ITU V.90 Networking Networking Network adapter Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet Expansion Expansion Slots Total 1 x front accessible Expansion Slots Total 2 ( 1 ) x memory 1 ( 1 ) x CardBus - type II Interfaces 1 x docking / port replicator, 240 pin docking 2 x Hi Speed USB, 4 pin USB Type A 1 x parallel, IEEE 1284 (EPP/ECP), 25 pin D Sub (DB25) 1 x display / video, VGA, 15 pin HD D Sub (HD 15) 1 x infrared, IrDA 1 x modem, phone line, RJ11 1 x network, Ethernet 10BaseT/100BaseTX, RJ45 1 x display / video, S video output, 4 pin mini DIN 1 x microphone, input, mini phone mono 3.5 mm 1 x headphones, output, mini phone stereo 3.5 mm Miscellaneous Features Locking device keyhole (cable lock), administrator password, hard drive password, power-on password, asset ID, IBM Embedded Security Subsystem 2.0 Compliant Standards ACPI 2.0, ACPI 1.0b, FCC Class B certified, CE, MPR II, UL, BSMI, cUL, NOM, VCCI-II Operating System Microsoft Windows XP Professional Software Included Adobe Acrobat Reader, PC Doctor, IBM Rapid Restore Ultra, IBM Update Connector, InterVideo WinDVD, IBM Access Connections, IBM Access Support, Access IBM,(OEM) Battery Technology lithium ion Capacity 4400 mAh Average Run Time 5 hour(s) Installed Qty 1 Ambient Temperature Min Operating Temperature 50 °F Max Operating Temperature 90 °F Humidity Range Operating 8 - 80% Dimensions (W x D x H) Unit 12.2 in x 10 in x 1.1 in Weight Unit 4.9 lbs Warranty 3 Years Limited Warranty on parts and labor. IBM 23738TU Summary ********************************************************************************* NOTE...I DON'T BELIEVE THIS...I JUST TYPED FORTY MINUTES REPLY HERE and it instantly scrolled up like speed of lightning and disappeared like last night. I'll ATTEMP to try again later. So please don't reply yet as you need to read my discoveries in changing the RAM chip. Meanwhile, thanks again...take care. ~ ED ******************************************************************************* TRY #3...I'm Back :-) Your diagram showing where the RAM chip is located was right on. Thanks. Here's my DISCOVERY :-( The RAM chip installed was NOT a 512mg...but only a 256mg chip. The ads ans specs say it's a 512mg...NOT SO. I was lied to by either the manufacturer or refurbishing company who removed the original 512 chip and reinstalled a 256 chip. I was lied to by the Tiger Direct guy on the phone. There are NOT two chip slots...only one. So I now have a useless removed 256mb RAM chip. Replaced with the 1gb RAM chip I just installed. So instead of having 1-1/2 gb RAM, I only have 1gb. Here's the crux. To. go to 2gb RAM I'd need to buy a full 2gb RAM CHIP and discard the 1gb for which I just paid $39.99 ($45.00 with s/h). This means another output of almost a hundred dollars plus the $45.00 just wasted because they wont accept return once the sealed chip plastic was opened...even though I had no idea there was only ONE SLOT in this PC instead of TWO like the Tiger Guy said. Now...crux #2...this new 1gb RAM does nothing more to increase speed. I just watched a 2.01 MINUTE YouTube video which took a HALF HOUR to load, so I threw the money away for nothing, eh? There is no noticeable change except the 'speed' shows it now as 41.2 kbps instead of 40 kbps. Okay...now HOW do I get to speed this thing up to normal viewing in real time? I also saw an ad for 4bg RAM Gateway laptop with 120gb hard drive for $404.99 which is all suped-up with everything. I had to upgrade a LOT since I got this only four months ago...taking over a hundred hours to load it, like Internet Explorer 5 to 6 and then to 8 and now to 9. I'm using AVAST Anti-Virus, after trying for 23 hours to get ADVAR, then find out it didn't load because of problem on the servor's end. Added Firefox and upgraded twice. Loaded MS Protection but it created more problems so I deleted it...now with AVAST which I like. Soooo...I've literally spent over 200 hours to get this thng where it's at now, plus the wasted money for the upgraded RAM chip.and I still don't have increased speed. HOW do I get it? IF the processor has to be changed does this mean I have to gut the thing and install a new motherboard? If so, what kind of money cost are we talking here? I bought this four months ago as a refurbished unit only because I was able to get it on payments of only $25.00 a month. If I had to wait to get $400.00 cash I'd never have it. :-) Okay...that's it for the moment. Thanks much again for your help offering and detailed instructions...appreciate it more than you realize. Best Wishes And God's Blessings To You And Yours In Everything Always. Most Respectfully... ~ ED  ---------------------------------------------------------------- Javin007: Well, let's start with the RAM. If you're running windows XP, you can assume all the extra processes (virus scanners, and whatnot) will be eating up about 512 megs of the RAM. First thing to do is check DXDIAG again (start/run) and verify that it's now reporting the correct amount of RAM. (Don't be surprised if it's like 9 hundred something megs or slightly more. It won't report 1024 or 1 gig.) This being said, that will leave you with the other 512 for your applications. This box won't be running the latest and greatest 3D games, but I suspect it was never intended to. If the heaviest hitter you'll have running is along the lines of photoshop, the 1 gig of RAM you have now should be plenty sufficient. I wouldn't worry about getting 2 gigs. Not for this rig, anyway. Also, Avast is a great (and free) virus protection, every bit as good as Symantec's Norton, so good choice there. If your youtube videos are choking out, we need to start by verifying that it's an actual speed throttling problem. Go to www.SpeedTest.net and run the speed test. Come back with the results.

Topic by Javin007    |  last reply