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Thread: HU Quality AM/FM RDS/RBDS Radio with Features

  1. #761
    Join Date
    Jan 2006
    I'm gonna go for option C. Can't wait for these things to be available!

  2. #762
    FLAC TheLlama's Avatar
    Join Date
    Jul 2004
    All over the world
    Quote Originally Posted by rando
    @TheLlama: None of the designs shown by racemier are CRAM though architecturally they appear quite similar according to the information that's been released to date.

    I believe (but can't be certain) that all three of the solutions racemier recently displayed are Design B variants. The smallest one (let's call it B.2) appears to be focused on minimal size accomplished by a tighter layout and smaller connectors. The 'muscle' (B.3) version includes a built in four channel audio amplifier. According to racemier's post, the other is the original Design B shown several months ago.
    Thanks rando, that clarifies alot. Then in that case I want the smallest one (number 2).

    Quote Originally Posted by LESLIEx317537
    A the scaled down one without rcas or amps is the one I'd be interested in. Seems as though it loops into the line in still.

    I wonder if it's possible to route the audio through the USB, like the Griffin RadioShark does.
    Me too. I'm not going to loop it though. Instead, I plan on running the radio output to my soundcard's line in. This way I can record the radio, crossfade between radio mode and mp3 mode, etc...

  3. #763
    Constant Bitrate
    Join Date
    Feb 2006

    Status update

    Hi everyone,

    Racemier is off enjoying some (well earned) vacation and judging from the activity on this thread and the questions asked, i feel it is time for some answers. I have been working with Racemier on this project helping out on control software and doing some testing on the units. I gathered the questions (and some answers) from the different posts over the last few pages and bundled them with some answers below.
    The 3 units on Racemiers photo have all been tested and are functioning. We are still negociating some component and assembly pricing so we prefer not to give a final price. Right now we guess it will be around 125 US$, but dont nail me down if this turns out totaly wrong.

    Now to business with Questions and Answers:

    Q: Would it be possible to get suggested diagrams for how to hook these up?
    A: Certainly, working on them

    Q: Will your top end ("muscle") one be able to pass through sound card outputs via its built-in amp?
    A: All versions have an AUX input (stereo) so you can connect any sound source to it, there are also 2 mono inputs intended for GSM phone and GPS navigation sound, so the choice is yours

    Q: wow looks great. Just one question though and perhaps i'm just missing it, but what about an antenna?
    edit: ok i see it in the first picture. what kind of connector is that? i'd love it to be a standard motorolla jack

    A: The connector on the pcb is a PMB connector, compatible with Fakra which is the newer standard for car radios. We can supply an adapter cable PMB plug to Motorola type chassis connector, this way you have an flexible (small) coax inside your carputer 'case' and you can mount your 'normal' antenna connector on a convenient place.

    Q: So whats the deal with the software and integration, also whats the price...
    Edit: Oh yeah, will the driver be open sourced? I need to be able to control the unit in Linux, so I was planning on writing a character device driver for it.
    Edit Again: About the smaller coax connector. I actually like the idea. I will be mounting a coax connector on the back of my unit for hook-up. So having a smaller internal connector will help reduce some of the bulk
    A: The HQCT is controlled trough USB, it is configured as a USB HID device, the tuner package will contain the unit, the necessary connectors with about 50 cm (20") of cable, a working control program (exe) and the source code of this program (Delphi 5) + the complete set of control strings and their meaning. This way you can hook it up and try it right away, after that you can get your own control program. We hope we will get ideas, tips tricks and programmes as a return via this forum for example. The control program we have so far does the basics.

    Q: Is this finished now that board with v3 on it looks done, or is that a bought in module and now we need software?
    A: We are currently setting up the production of a first batch, we got the tuner modules, one of the two controller chips, the second sits somewhere in transport. So if all goes as planned we should be testing the units by the end of the month.

    Q: am/fm/dab support ?
    A: AM FM and Wheaterband, DAB and DRM are the next projects

    Q: rds / tmc ?
    A: RDS (and RBDS)

    Q: Another question: is this module going to have HD radio capabilities?
    A: not this one

    Q: I don't think my poor little 90watt OPUS can handle powering any more devices.
    Q: Unless your using the "muscle version" I assume the board will consume well under an amp (12W). Any official news on the power consumption?

    A: the unit eats about 180 mA, the muscle one obviously more, depending on the load. But the 12 V can be taken off the car battery, only the 'small' one needs a regulated 5 V DC supply

    I met with JC60 in Belgium the other week and from what he told me it would be another 2-4 weeks before it would become available.

    He showed me the different versions and they're all great units,
    the "power version" played really well, but for me the basic version is exactly what I want.

    Q: How do you plug a motorola male antenna plug into one of those?

    A: using an adapter cable

    Q: How exactly does the sound get transmitted to the pc to the amplifiers to the pc.
    A: The unit has a stereo Aux input and 2 mono aux inputs, it has two pairs of stereo outputs (Front and Rear), on top of that the 'muscle' one has 4 pairs of low impedance speaker outputs (Front Left and Right, Rear Left and Right) Via the controlling program you can switch any input (Aux 1, 2, 3 or tuner) to the outputs. It is possible to mix, to blend , to fade to amplify, to mute, to regulate treble and bass and so on ...

    Q: On my radio xtreme there is a line out plug that goes to my sound card....I see on these devices there are RCA plugs, USB, and speaker terminals, How would you go about connecting it to the sound card? RCA --> RCA->3/8" adapter?

    Yes. Or you can get the smallest one and avoid any bulky connectors.
    I believe there are two pairs of RCA connectors so that you wire the comonents as such:


    I think the radio normally just sends the carputer input to the amplifier. Once you instruct it to start playing, it switches the output to the radio.

    A: Yes and no, the carputer instructs the unit via USB, the outputs can be wired to a sound card or to an amplifier.

    Q: I have to say I can not what for this unit!! Do you know if any one has done work on a skin for road runner and this unit. If this unit gets AM, FM and Weather I will have to start a second computer for my boat.
    A: Get cracking on your boatputer.

    [I]Q: Which device is everyone planning on getting? Device A / B / or C?
    I'm planning on C as it has the amplified RCA outputs.[/
    A: If you look closely to the photo's you will see that the 'muscle' is V3.0, i like the name 'muscle' so we can keep it, the small one with the disk drive power connector is V1.0, the middle one with RCA connectors but without amplifier is V2.0.

    [I]Q: Does anyone know what the voltage of the Amplified RCA outputs are?[/I]
    A: the voltage swing is 24 Volts, AC coupled (so +12 to - 12), minimum impedance is 2 ohm, recommended 4 ohm.

    Q: A the scaled down one without rcas or amps is the one I'd be interested in. Seems as though it loops into the line in still.
    A: Correct, the optional header (not fitted on the photograph) carries al the other signals.

    Q: I wonder if it's possible to route the audio through the USB, like the Griffin RadioShark does.
    A: We are considering doing this sometime, it may require some extra chips ...



  4. #764
    FLAC Spaghetti's Avatar
    Join Date
    Jul 2003
    Spagcave, in da UK Today's phrase: J'aime Alizee
    Is it time for a new thread, maybe a sticky on this?
    In da club....


    Bunny's first poo
    __ U

  5. #765
    My Village Called 0l33l's Avatar
    Join Date
    Jul 2004
    Berkeley, CA
    Quote Originally Posted by Spaghetti
    Is it time for a new thread, maybe a sticky on this?
    I vote for a new thread w/sticky.

  6. #766
    Raw Wave rando's Avatar
    Join Date
    Mar 2004
    Redondo Beach, CA
    Agreed! It probably makes sense to start a new thread focused solely on racemier's HQCT. I'm sure the Monkey can put his sticky on it. This thread can continue for any future progress on the open architecture design or not at all -- at the discretion of the MP3Car management.


  7. #767
    Variable Bitrate
    Join Date
    Mar 2004
    ^^ I'll second that motion!

  8. #768
    Join Date
    Oct 2003
    is the new thread ready ? I can't seem to find it (can also be a problem of my search capabilities )

    Btw any news on how to order a radio-module ? I cannot wait !

  9. #769
    Variable Bitrate NeoMatrixJR's Avatar
    Join Date
    Aug 2004
    Arround Des Moines, IA
    yeah, if a new thread starts up can someone post it in here?

  10. #770
    Constant Bitrate
    Join Date
    Jan 2006
    cant wait for this, is the aerial input or adaptor the same style for UK cars? any eta?

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