i2c radio, Where can I buy/build an - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 30th July 2003, 02:21 PM   #1
diyAudio Member
 
Join Date: Jul 2003
Location: France
Default i2c radio, Where can I buy/build an

For my carputer, I'm going to pull my head unit and replace it with an amplifier and radio. Thing is, I don't want to use a USB radio, as they're not very compatible OS-wise and very expensive for what they are. Thus, I've decided that the best bet is a radio/tuner that I can plug into the audio-in jack and control over the i2c port.

I'm a mechanical engineer and have some electrical engineering knowledge, thus I'm open to building my own (likely with a philips 5767 chip or some derivation therof), but for quality reasons I'd rather buy a premade board.

Can anyone help me? Does this sort of thing even exist? (If it doesn't, I'd love to design it, but I don't think that I have the expertise to start from zero. Maybe a good summer project?)
  Reply With Quote
Old 30th July 2003, 09:35 PM   #2
diyAudio Member
 
Join Date: Jun 2001
Location: Alexandria, VA USA
Default Look at TI

Don't know what is out there built already, but TI makes a DSP based radio that is ran using I2C controls. I know that a Digital card is made using it in GB - it includes an am/fm reciever as well as the digital tuner. I don't know any of the specs of where it works - Canada, or Europe is unknown. Just not here in the US.

Secondly, I think a company here in the States is using it for a multiband radio - Ten Ten [???] or something like that.

You can also look at the XMPCR for XM service. It uses a computer to provide control, and if you do a slight alteration (see thread in digital section) you can get digital outputs for it too. It would be way cool to implement this in a car since you could skin the controls the way you want. There is a growing DIY movement around this little box - and at $69, its pretty cheap to play with.
  Reply With Quote
Old 31st July 2003, 09:45 AM   #3
diyAudio Member
 
Join Date: Jul 2003
Location: France
Sawzall--

No big deal if it only works in Europe. I'm living in France for the moment. Thus the XM service isn't too interesting. In fact, I'd love to take advantage of their radio infrastructure and incorporate RDS and TMC into my design. (For those who don't know, TMC monitors a seperate radio stream and warns of traffic problems.)

Do you know any more specifics? Is Digital the name of a company in UK? If so, I can't find it too easily in google, not admist all the "noise".

I looked at Ten Ten's website, but what they do is extremely professional. I'm looking for cheap, cheap, cheap because money IS an object.
  Reply With Quote
Old 7th August 2003, 01:03 PM   #4
diyAudio Member
 
Join Date: Jul 2003
Location: France
bump
  Reply With Quote
Old 8th August 2003, 08:24 AM   #5
diyAudio Member
 
Join Date: Dec 2002
Location: Australia
A simple AM/FM thing would be great, its the only thing holding me back from making my own car head unit.
It's great to see someone investigating it.

EDIT - found something that might be useful
http://us.st.com/stonline/bin/hilite...&words=TDA7500
  Reply With Quote
Old 20th August 2003, 01:23 AM   #6
diyAudio Member
 
Join Date: Jul 2003
Location: France
fr0st--

Thanks for the link. It looks promising and I'm going to try to get a chip ASAP. The first thing I notice, though, is that it's overkill. We don't need chips to do all sorts of digital processing. Our computers can do that at far less cost.

(What's cool, though, is that it accepts digital audio inputs, meaning that I can run the SPDIF output from my Nehemiah mobo right into the chip.)

Realistically, we just need a chip that tunes into radio stations and gives an audio output.

Secondly, I'm looking for a cheap way to build the amplifier, preferably something I can control with I2C also, although that's not really necessary because lowering the volume of the computer output is almost as good as reducing the amp's power. Anyone have any ideas?
  Reply With Quote
Old 20th August 2003, 07:32 AM   #7
diyAudio Member
 
Join Date: Dec 2002
Location: Australia
Ti's PGA's (programmable gain amplifiers) are good except they are serial (I think).
Ti's pre programmed sound DSP's have I2C and come with digital signal control which can run to a DAC if thats what your looking for.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
My local Radio Shack is closing, what items to buy to build a cheap Gainclone? beady Chip Amps 17 15th July 2006 05:23 AM
build my first full ranger,let's build another one:a small fullrange high end pc-spea then_dude Full Range 2 30th November 2005 07:54 AM
Do i need to build main supply (240v) filter?Or build power distribution? thomgun_lc Chip Amps 9 16th September 2005 09:52 AM
Mod to an old radio Petman Tubes / Valves 12 25th January 2003 06:46 PM


New To Site? Need Help?

All times are GMT. The time now is 04:07 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2