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An Amateur Building the JP1.x Interface

 
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mappedyr



Joined: 20 Sep 2003
Posts: 44
Location: Denmark

PostPosted: Fri Oct 24, 2008 2:28 pm    Post subject: An Amateur Building the JP1.x Interface Reply with quote

I just uploaded a document I wrote about assembling the JP1.x interface. I did my best with the language but it probably shines through that English is not my native language. You can find the document here.

Cheers,
Kjeld
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Tommy Tyler
Expert


Joined: 21 Sep 2003
Posts: 410
Location: Denver mountains

PostPosted: Sat Oct 25, 2008 7:54 am    Post subject: Reply with quote

Kjeld,

Congratulations on your article, and thanks for sharing with other forum members. This is exactly the kind of contribution that helps make the forum more useful, and I wish more members would do that. I don't think I would have known English was not your native language by reading the article.

I'm writing to remind you about the notorious wire/pin #5 problem. I see a solder pad on your board for wire #5, and it looks like all eight wires are in the cable. That makes your interface really a JP1.2 rather than JP1.x. If you ever need to use it with a JP1.3 remote you should remember to disconnect wire #5 AT THE CONNECTOR END, not just the Veroboard end. Otherwise that wire can cause problems by picking up electrical noise and sending it to the remote.

Tommy
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mappedyr



Joined: 20 Sep 2003
Posts: 44
Location: Denmark

PostPosted: Mon Oct 27, 2008 9:53 am    Post subject: Reply with quote

Hi Tommy.

Thanks for your comment. I have updated the document (and my interface) as you described.

Cheers,
Kjeld
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The Robman
Site Owner


Joined: 01 Aug 2003
Posts: 19929
Location: Chicago, IL

PostPosted: Mon Oct 27, 2008 11:18 am    Post subject: Reply with quote

Hey Kjeld,
Well done on an excellent article. You mention in the article that you used to play with the really old OFA remotes using the info on John Wasser's web site. Did you make yourself one of the cables that went with the old 3-hole remotes? If so, do you have any recollection of your experiences from those days? I think you may be the first person from those days to also be a JP1 user.

Rob
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Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!
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mappedyr



Joined: 20 Sep 2003
Posts: 44
Location: Denmark

PostPosted: Tue Oct 28, 2008 9:47 am    Post subject: Reply with quote

Hi Rob.

Thanks for your comment about the article. I never made one of the cables for the 3 holes. As far as I remember the only thing possible at that time was to activate the remote control from the PC via the cable.

I had my URC-2585 upgraded by the Danish OFA support team. So they could actually add new devices (and maybe protocols) via the 3 holes. I don't think the interface was fully reverse engineered back then.

I also have an old remote control looking like this:



I don't have it right here, but I remember it is really slow and has a very strange user interface. I'm pretty sure it has the 3-hole interface as well.


Cheers,
Kjeld
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classicsat



Joined: 20 Feb 2004
Posts: 279

PostPosted: Tue Oct 28, 2008 12:26 pm    Post subject: Reply with quote

I have one a bit like that called a Maestro II, which is JP1.
It was OEMed for Next Level, for an old digital music service box, which supposedly displayed info from the box on the remote (it has an IR receiver).
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mappedyr



Joined: 20 Sep 2003
Posts: 44
Location: Denmark

PostPosted: Tue Oct 28, 2008 1:17 pm    Post subject: Reply with quote

Mine presents itself as "One For All Video Pro" when powered on. I'm not quite sure if it's called URC-6800 (like the name of the first photo indicates) since that's the number for the Cinema 6.

Anyway, here is an actual photo of the one I got (notice the keys):

and the 3-hole interface:



Cheers,
Kjeld
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