JP1 Remotes

YNunez78 · Joined: 19 Jan 2010 Posts: 18

I am going to build DB25 JP1 interface like the one Tommy Tyler has here:

http://www.hifi-remote.com/jp1/simple/index.shtml.

My question is can I put a Db25 to Db9 adapter like this one:

http://www.google.com/products/catalog?hl=en&q=db25+to+db9+adapter&ved=0CC8QzAMwAw&cid=4089401562802176679&sa=title#p

I have seen Db9 interfaces, but they are expensive for my budget and it seems involved to build one.

Please let me know, Thanks

Mark Pierson · Posted: Tue Jan 19, 2010 5:38 pm Post subject:

The interface you linked to is a parallel interface designed for use on a standard printer port. The DB9-DB25 adapter won't help you since the interface cannot be attached to a serial port.
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Mark

YNunez78 · Joined: 19 Jan 2010 Posts: 18

What if I find a DB25 to DB9 Serial, would that work?

YNunez78 · Joined: 19 Jan 2010 Posts: 18

Here is one.. Forgive me if i am not getting it..

http://www.google.com/products/catalog?hl=en&q=db25+to+db9+serial&ved=0CBoQ8wIwAw&cid=14898015842470418957#p

The Robman · Posted: Tue Jan 19, 2010 5:48 pm Post subject:

Assuming that you have an old fashioned "EEPROM" remote, you will need to build or buy the correct cable for the ports that you have on your PC, so if you just have a serial port available, you would need to build a dedicated serial cable.

This is because the interfaces for the old fashioned "EEPROM" remotes use a process called "bit banging".

None of the "EEPROM" interfaces work with adapters of any sort.
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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!

YNunez78 · Joined: 19 Jan 2010 Posts: 18

Ok, so if I build the db25 to JP1 cable found on this site. That will work, but not if i attach a db9 adapter unless i alter it for bit banging?

YNunez78 · Joined: 19 Jan 2010 Posts: 18

Its a silver 3-1 Comcast remote i checked and it has the Jp1 port under the battery cover

The Robman · Posted: Tue Jan 19, 2010 6:22 pm Post subject:

3FG · Expert Joined: 19 May 2009 Posts: 3367

Most Comcast 3 device remotes are JP1.2 or 1.3, and have flash memory. However, there is one model which is JP1.1. Before you build anything, blink back the signature of the remote. Use the 983 command in this link.

Or, if the OK/Select button is red in color, then you have a JP1.3.

YNunez78 · Joined: 19 Jan 2010 Posts: 18

ok my ok/select is grey. the 983 blinked 1009

3FG · Expert Joined: 19 May 2009 Posts: 3367

That means you have a 1067 remote, flash memory with a HCS08 processor. It is a JP1.2 interface. You should make or buy a cable with JP1.2/JP1.3 capability.

YNunez78 · Joined: 19 Jan 2010 Posts: 18

Is this one compatible, i dont see where it states compatability.

http://www.hifi-remote.com/jp1/simple/index.shtml

mdavej · Expert Joined: 08 Oct 2003 Posts: 4501

No, but THIS one is.

YNunez78 · Joined: 19 Jan 2010 Posts: 18

Ok, thank you all for your help, i will get started right away, I am not used to reading drawn schematics, this will be interesting.

YNunez78 · Joined: 19 Jan 2010 Posts: 18

Question, not that I have the jp1 interface completed, does IR7 work for Jp1.2/3 ?