JP1 Remotes

ted walsh · Joined: 04 Oct 2007 Posts: 2

Hark.
instead of going through the whole rigmarole of learning codes etc is it possible to look at a particular chip set and determine which would be the best base file to start with? its just I have an (chineese) OEM security PVR that I would like to control from slingbox but dont know where to start.... and to tell the truth I like to try and avoid buying a JP remote just in order to learn the codes.

so. can I look at the chipset to determine the best place to start?

TIA
TED Rolling Eyes

johnsfine · Posted: Thu Oct 04, 2007 9:04 am Post subject:

Sometimes you can identify the code set by looking at the one important chip inside the original remote. But usually not.

You can't identify the code set by looking at chips inside the PVR itself. The IR signal is decoded by firmware in a microprocessor. Knowing which microprocessor tells you nothing about the IR code set it is decoding.

The CaptureIR hardware is less expensive than a JP1 remote and more useful for decoding signals from an original remote. But no one is selling that hardware assembled. You need to get the IR sensor part and make your own connection to put it into the printer port and maybe to supply better power for it than the printer port provides. All that still isn't very difficult unless you totally object to doing any electronics assembly.

ted walsh · Joined: 04 Oct 2007 Posts: 2

I know I should probably look first but... where can I find the SW and a scheme of the hardware for a capture device?
TIA

johnsfine · Posted: Thu Oct 04, 2007 12:12 pm Post subject:

Lots of info, including links to the software and the IR detect component are all here:
http://www.hifi-remote.com/forums/viewtopic.php?t=6224

As for schematic. It may be too simple for a schematic. An IR detect component is a three wire device. You connect one wire to power, one wire to ground and the third wire to any input pin of the parallel port (you can also make the ground connection and maybe the power connection on the parallel port).

There are many choices for IR detect component. Most of the CaptureIR discussion is based on one very general purpose IR detect component, that works unmodulated and at almost any modulation frequency, but at only a narrow range of distance. Other IR detect components work on a narrower range of IR modulation, but work better and work at a wide range of distances.