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Thread: FM/DAB digital radio - THAT WORKS!!

  1. #691
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    Lenovo == Ex IBM == Probably adhere's to the specs... I suspect the overcurrent stuff was due to the initial surge - probably that bank of monster caps charging up! (NB: I have not seen the schematic, nor traced the tracks!).

    I've got a maxed-out 7-port hub on mine into which the DAB box connects. Its powered by an 'ebay special' 3.5A DC-DC converter box to which I added a relay to switch the 12V side. The relay coil is energised by the USB connection from the PC into the hub.

    I've had no issues with either Craig's board nor the nrgizerbunny board I have on any of the PC's/hubs I have tried them on.

    Maybe the descriptor on the USB-->serial daughter-board is telling the PC that its a low-powered device (<100mA) or something, and then the DAB stuff tacked on the USB rails takes it over that limit and the PC complains. Most PC's dont mind. The board I am working on at the moment declares its self as a low powered device, but the DELL PC its plugged into does not moan if I connect a 700mA load across the rails and then plug it in! Board still enumerates and still works, and USB rails still @ ~5V.

    Here;s the PSU I used: http://cgi.ebay.co.uk/3500mA-Car-Pow...etzger%C3%A4te the following also looks interesting: http://cgi.ebay.co.uk/24V-12V-5V-Ste...tDomain_0#shId

    Nigel

  2. #692
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    Quote Originally Posted by veletron View Post
    I suspect the overcurrent stuff was due to the initial surge - probably that bank of monster caps charging up!
    That's what I thought. The warning only came up when first plugged in.

  3. #693
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    Looks like the over current thing is worse than I thought. My unit won't work at all with my own personal laptop (Sony Vaio). Everytime it is plugged in, the USB hub gets stopped by windows. The only way to get it to work is to leave it connected and reboot the laptop.

    That's made slightly irrelevant by the fact that I've lost the RH channel coming from the unit. On inspection I've found that the nut that has been put on top of the line-out socket which in turn has broken the solder on the underside of the board. It would be a problem except the socket hasn't been soldered in place flat to the board. Here's a picture so you can all check your own boards.



    Needless to say I will be returning it.

  4. #694
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    i'm sure craig will swap out your unit for you. Was that 3.5mm socket soldered in at an angle or was it a result of that nut?

    I wonder if your overcurrent issues are associated with the broken track - or have you got a short somewhere? I've got 3 boards in front of me and every PC in my house (i've got 4) has been okay with it.
    The epitome of Function over form and is probably the best Car PC in Europe.
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  5. #695
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    Quote Originally Posted by nrgizerbunny View Post
    i'm sure craig will swap out your unit for you. Was that 3.5mm socket soldered in at an angle or was it a result of that nut?
    A bit of both. It was on the **** a bit when I received it but obviously it's worse now that the solder has broken.

    Quote Originally Posted by nrgizerbunny View Post
    I wonder if your overcurrent issues are associated with the broken track - or have you got a short somewhere? I've got 3 boards in front of me and every PC in my house (i've got 4) has been okay with it.
    The first thing I did when I received it was plug it into my laptop at work and got the over current message. This never happened with my CarPC though, which is an Intel Atom board. With what I've experienced today, with my Vaio, I'm fairly sure that it's a spike in current when it's first plugged in.

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  7. #697
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    Interesting. I have never had the overcurrent thing on all the machines I have had a number of units on and I have had PCI based USB cards, mobo based USB ports including on 2 laptops and via USB hubs (including via a car PC hub from MP3 Car) all without problems.

    I'll do some more tests next week when I am back in the office. Have a few older laptops I could try...

  8. #698
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    Hi

    I've had the overcurrent thing too on my laptop, but not had it on the car pc (I use powered hub on carpc). Replugging quickly on the laptop allows it to enumerate correctly.

    I too had a disconnected channel due to a broken track. The tracks around components that recieve any kind of external loading (i.e the audio jack) are best being beefed up a wee bit. Maybe an idea for a future version of the board, or use a jack with a metal shell with pins that can be soldered to the board. Easily solved anyway.

    I've been comparing and contrasting my unit with my Venice 5 from the comfort of a motorhome in the highlands where I have a relatively poor signal (I was gonna go hill walking, but the weather has been pish!!).

    The V7 does offer noticibly better reception than the V5. The V5 warbles occasionally while the V7 does not.

    The reception is excellent, unfortunately, the CF plugin is needing *alot* more work before it becomes usable. I'll post up my bugs in that in a separate post.

    Nigel

  9. #699
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    Securing The USB Daughter Board

    Securing the USB Daughter Board (got sick of it coming loose!)

    See pics

    Nigel
    Attached Images Attached Images   

  10. #700
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    CF Ultimate Radio Plug-in issues

    Hi

    Firstly, I am aware that the CF plug-in has not yet been released, and as such, bugs are inevitable. Here is my list of issues thus far:

    1) It keeps setting the WAV volume to maximum. I would like it to leave well alone since such behaviour wakes up the neighbours!

    2) It has a habit of turning on/off quickly many times when I first goto plugin screen

    3) It is loading the scrolling text into the CurrentMedia.Artist and CurrentMedia.Title fields as well as the track field. I have a modified skin to display the album and artist, these get filled with scrolling text too so I see 'Radio 1' scrolling in three places at the top of the screen. Can it not just use the one field and leave the others blank?

    4) Plugin is not able to properly control the audio source/destination. The audio quality when using the plug-in is really awful. I have the 'source audio device' set to 'Asus Xonar U1 Audio Device - Line In' with the 'playback audio device' set to 'Asus Xonar U1 Audio Device - Volume Control'. These are the same settings as I use with Andy's plugin on the V5 where they work fine.

    If, in the ultimate radio plugins settings, I set the 'source audio device' and 'playback audio device' to 'none', thus using CF to control the radio, but not to direct the audio, then minimise CF, and manually (via sound and multimedia devices in control panel), set the line-in to 'monitor' mode then the audio quality is fine. As such, I can confidently state that this is an issue with the plugin, not my hardware/config!

    As I say, with Andy's plug-in and a V5, and the exact same hardware/settings above, audio quality is excellent, with the V7 module, and the ultimate radio CF plugin audio quality is incredibly poor (unlistenable). The CF ultimate radio plugin does not manage the audio sources correctly whereas Andy's plug-in does.

    5) Very high CPU use. Centrafuse sits at 30% when playing an MP3 but it sits at 75% with the radio turned on. This is possibly due to all the scrolling text etc. Can the PC not optionally disconnect from the radio when the ultimate radio screen is left, leaving the station name present, and the radio playing the last selected station. Can it also, optionally be told not to scroll the text, or display DAB scrolling text stuff. All i'm personally interested in is the station name! I have confirmed, by using the dab_master.exe app that it is definately the plugin causing all the CPU load. dab_master will control the unit with little CPU activity.

    -------------

    The biggy's for me are the plugins habit of setting the WAV volume on the mixer to max, and the incredibly poor audio quality when the CF plugin is controlling the audio sources. Its now residing in a box until these issues get resolved, although I'll obviously test new versions. In the meantime, the V5 and Andy's CF plugin are back in the van.

    I've attached some audio recordings of the sound quality when the CF plugin is managing audio sources, vs me managing them via control panel, both with the same radio/aerial/pc/hardware. The microphone was in the same location. Basically, the 'poor quality' one is distorted. It sounds nowhere near as bad on this recording as it does in real-life!

    Nigel
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