The frequency of the IR carrier of your remote has to be accurate for your set. This also applies to the data codes that it sends on the carrier.
The way to increase a TV remote would be to have the IR LED become more intense, or get a remote extender. I think Radio Shack and many of the HiFi stores sell a range extender for IR remotes.
Modifying the remote may not be very easy, or practical. Messing inside will also increase the chance of doing some damage to it, and rendering it not usable. If the IR LED was changed to a stronger one, the drive circuits in the remote would have to be able to drive it. There is also the problem of selecting a higher output compatible IR LED to begin with.
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I don't think anything above 40KHz would work because the T.V. probably wouldn't accept the signal so I am wondering how I would go about increasing the distance my 32KHz signal can go.
Any ideas?
Thanks.