JP1 Remotes Forum Index JP1 Remotes


FAQFAQ SearchSearch 7 days of topics7 Days MemberlistMemberlist UsergroupsUsergroups RegisterRegister
ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

ur74a?

 
Post new topic   Reply to topic    JP1 Remotes Forum Index -> JP1 - Hardware
View previous topic :: View next topic  
Author Message
bevhoward



Joined: 24 Jun 2005
Posts: 245

PostPosted: Mon Aug 15, 2005 7:54 pm    Post subject: ur74a? Reply with quote

Anyone familiar with the X10 UR74A programmable/learning remote?

The reason I ask is that it is inexpensive ($20) has built in RF that includes the ability to program the different housecodes for the x10 button (something that can't be done with X10 ir signals)

There is a single chip on a pad surrounded with 8 solder pad holes although the spacing between the rows is larger than the JP1 spacing.

The chip info was very hard to read but _appears_ to be

atmel 432
2401gan (could be 24C1gan)
6127 a

The circuit board id's the chip as "U2"

Image of the board and button pad at

http://BevHoward.com/stuff/UR74A.jpg

tia,
Back to top
View user's profile Send private message
The Robman
Site Owner


Joined: 01 Aug 2003
Posts: 18827
Location: Chicago, IL

PostPosted: Mon Aug 15, 2005 8:56 pm    Post subject: Reply with quote

You don't actually state it, but I'm assuming your question is "can this remote be hacked to use JP1?"

If that is your question, then the answer is "no". We often get people asking if this remote or that remote can be hacked to use JP1 and unless the remote is made by UEI, the answer is always "no".

Remember, we didn't invent JP1, we just reverse engineered our way into it. Basically, we're using functionality that was built into the remotes on purpose, it just wasn't intended for end user use.
_________________
Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!
Back to top
View user's profile Send private message Visit poster's website
classicsat



Joined: 20 Feb 2004
Posts: 279

PostPosted: Tue Aug 16, 2005 11:29 am    Post subject: Reply with quote

It looks like a standard 24C16 I2C EEPROM. IR will likely read it to the dump screen, but likely fail trying to process it.

The pads around the IC that is there is for a DIP package EEPROM, rather than the SOIC one installed.

* I know IR should be able to read non JP1 EEPROMs, as I have done it to reverse engineer an EEPROM on a USB device.
Back to top
View user's profile Send private message
bevhoward



Joined: 24 Jun 2005
Posts: 245

PostPosted: Tue Aug 16, 2005 9:19 pm    Post subject: Reply with quote

>> can this remote be hacked to use JP1? <<

The question was actually if it had been looked at by anyone else since, from my limited knowledge, the remote itself appears to be very similar to the other URC remotes including instructions and the code tables which seem to closely match the URC manuals.

Because of it's small form factor, what seems to me to be a good layout and low cost plus it's RF capabilities though it might be of interest.

I had the same thought about the dip layout, but didn't feel qualified to comment on a chip, however, did think that a using dip socket as a programming connector might have been a possible design intent.

If any of the hardware experts here would be interested, will donate the unit for your tinkering pleasure as partial payment for what I have learned here... no strings attached.
Back to top
View user's profile Send private message
The Robman
Site Owner


Joined: 01 Aug 2003
Posts: 18827
Location: Chicago, IL

PostPosted: Tue Aug 16, 2005 10:03 pm    Post subject: Reply with quote

The remote that I was thinking of (the UR24A) is made by X10 or IBM, so it's not a UEI remote. But, if you say the setup codes are similar to standard UEI setup codes, I could be mistaken, maybe the UR74A is a UEI remote.

Could you post some examples of codes that are the same? Or if you have a link to an online version of the user manual, even better.
_________________
Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!
Back to top
View user's profile Send private message Visit poster's website
The Robman
Site Owner


Joined: 01 Aug 2003
Posts: 18827
Location: Chicago, IL

PostPosted: Tue Aug 16, 2005 10:08 pm    Post subject: Reply with quote

OK, I used Google to find some info about this remote, and the code list doesn't look like UEI codes.

Here's the manual...
ftp://ftp.x10.com/pub/manuals/ur74a-om.pdf

Here's the code list...
ftp://ftp.x10.com/pub/manuals/ur74a-codelist.pdf

And here's a pic...


_________________
Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!
Back to top
View user's profile Send private message Visit poster's website
roger1818



Joined: 10 Apr 2006
Posts: 7

PostPosted: Tue Apr 11, 2006 10:18 pm    Post subject: Reply with quote

The Robman wrote:
The remote that I was thinking of (the UR24A) is made by X10 or IBM, so it's not a UEI remote.


If you check out the following link you will find the following quote:

http://www.x10.com/support/faq_privacy.html

Quote:
In 1988 X10 started manufacturing universal remotes for Universal Electronics, Inc. (UEI) under the One-For-All brand. We expanded this business to the point where we were manufacturing 1 million remotes a month. We now make remotes for many OEMs and have the best IR code library in the business. X10 are now one of the biggest manufacturers of universal remotes in the world.


From this it looks like X10 makes UEI's remotes including the One For All brand. You are right though that the device codes are quite different (X10 uses 3 digit codes). It looks like X10 also makes remotes for RCA since their codes look very similar. I am not sure if this helps at all, but it is interesting.


Last edited by roger1818 on Wed Apr 12, 2006 8:52 am; edited 1 time in total
Back to top
View user's profile Send private message
The Robman
Site Owner


Joined: 01 Aug 2003
Posts: 18827
Location: Chicago, IL

PostPosted: Tue Apr 11, 2006 10:46 pm    Post subject: Reply with quote

While X10 may have made some remotes for UEI back in 1988 (and I have a Radio Shack 15-1919 from that era, which comes with an X10 base unit) they certainly don't make their remotes today.

The OFA brand is made exclusively in China by a company called "Computime", and their US brand (CT Global) distributes them here. Computime also makes alot of the other UEI remotes, but not all of them, as they do farm out some remotes to other vendors.
_________________
Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic       JP1 Remotes Forum Index -> JP1 - Hardware All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


 

Powered by phpBB © 2001, 2005 phpBB Group
Get Smart! the band's official homepage Rockabilly Central