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TV remote control uses very low freq., and actual range of using phone IR transmitter in this purpose is greater than range of IrDA connection. But regular TV RC requires 5x or 10x greater range. And it's important, that maximum power direction of transmitter is at the side of phone, not at the top (like in TV RC). In this case, it's better to build simple device for data port. Construction of this device is very simple - strong IR LED, one transistor and two resistors. Here is diagram (in Russian, but there is no important information):
http://www.iceinet.ru/network/img/ir000021.gif
Top section - reciever, we don't need it. Middle section - transmitter. All resistors must be recalculated for different voltage, but it's not difficult.
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Posted: 2002-11-13 14:38:00
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From PCMag.com:
Having your PDA serve double duty as a home-entertainment remote control is a very appealing idea. Because PDA software can be upgraded so easily, you can add new remote features and device control codes as you purchase new equipment. Also, PDA remote-control software can support configurations for several systems.
Unfortunately, whereas the consumer infrared (CIR) transmitters used in most consumer entertainment devices have a range of up to 30 feet, PDA infrared (IrDA) is typically rated to work at a maximum of 3 to 8 feet. But all is not lost.
Click to enlarge
We tried out the HP iPAQ Pocket PC H3950 ($650 street), which includes Universal Electronics' NEVO software and CIR transmitters with a rated range of up to 50 feet. After configuring the application, we had no problems controlling a wide range of equipment from our testing distance of 25 feet away. The software has a nice graphical user interface and setup that includes the option to download new device codes from the Internet. (Hewlett-Packard Co.,
www.HP.com. Rating as a remote: )
Several of the newer Sony Palm OS–based Clié models come with the Remote Commander, an infrared transmitter. We tested the Sony Clié PEG-NR70V ($599.99 direct) and found that transmission worked up to about 20 feet; the rating is a conservative 15 feet. The Remote Commander's interface lets you configure multiple devices, but if a control code isn't in the Remote Commander's database, you're out of luck. (Sony Electronics Inc.,
www.sony.com/clie. Rating as a remote: )
The Pacific Neo-Tek OmniRemote Springboard Module ($59.95 direct) adds a high-powered IR transmitter and remote-control software to Handspring Visors. The OmniRemote IR is rated to work up to 30 feet, and we found it effective at our tested 25 feet. You train the OmniRemote software using a remote that already works with the equipment you plan to control, tediously setting each button individually. (Pacific Neo-Tek,
www.pacificneotek.com. )
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Posted: 2002-11-16 22:29:00
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Heh, fine-looking additional boards from brandname manufacturers costs 100 times more, than real hardware. Software is only problem, but if you are really interested - it cant't stop you.
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Posted: 2002-11-18 12:12:00
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Dont worry about the distance!
Just get yourself a optic cable... You know the rest...
I know it sounds silly with a cable, but look at the bright side: You wont loose your remote as often as usual...
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Posted: 2002-11-18 12:53:00
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