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Thread: Need Some Hardcore Advice (PICS)

  1. #1
    Low Bitrate Ritalin Kid's Avatar
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    Need Some Hardcore Advice (PICS)

    Ok thus far I'm about 6 months into my Carputer project my specs are as follows:

    Shuttle FV24
    MPBS1 DC-DC PSU
    20 Toshiba Laptop HD with IDE adapter
    800 MHz PIII
    256 Megs of PC133 SCRAM
    LG CDRW/DVD IDE Combo drive
    Linksys Wireless USB 802.11b Adapter
    USB GPS Antenna
    Keyboard/Mouse (When Needed)
    15 Inch ELO USB Touchscreen
    Windows XP Pro


    Today I ran into two major problems and I've hit a major wall.

    1. My PSU isn't enough I have to underclock the CPU to get it to boot properly else it starts to boot to Windows and then crashes or turns off. I did have an extra 64 Meg stick of Ram I also ditched to save power... SO I guess the question is who makes the smallest 150 watt DC-DC PSU? Cause the MPBS1 isn't cutting it.

    2. I have the carputer hooked up into the MP3/AUX on my Blaupunkt through the special cable I bought for it seperately. I ran all the power down one side of my car and all audio down the other.. everything is either grounded seperately or straight grounded to the battery. I get not only alternator noise but also all kinds of funky low rumbling noises when the hard drive is working. SO I guess the second question is what should I do to get rid of the weird noises? Are there any special filters I need to use?

    Here's some pics of it setup but not in action yet.. my acr is practically in pieces and this project is spread throughout my car and my apt.

    http://www.ritalinkids.com/cadiproject.jpg

    http://www.ritalinkids.com/cadiproject2.jpg

    http://www.ritalinkids.com/cadiproject3.jpg

    http://www.ritalinkids.com/cadiproject4.jpg

    http://www.ritalinkids.com/cadiproject5.jpg

  2. #2
    Constant Bitrate henkbliek's Avatar
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    Re: Need Some Hardcore Advice (PICS)

    Originally posted by Ritalin Kid
    Ok thus far I'm about 6 months into my Carputer project my specs are as follows:
    1. My PSU isn't enough I have to underclock the CPU to get it to boot properly else it starts to boot to Windows and then crashes or turns off. I did have an extra 64 Meg stick of Ram I also ditched to save power... SO I guess the question is who makes the smallest 150 watt DC-DC PSU? Cause the MPBS1 isn't cutting it.
    The Opus is 150 watt isn't it? And it's not that much more expensive than this MPBS supply...

    2. I have the carputer hooked up into the MP3/AUX on my Blaupunkt through the special cable I bought for it seperately. I ran all the power down one side of my car and all audio down the other.. everything is either grounded seperately or straight grounded to the battery. I get not only alternator noise but also all kinds of funky low rumbling noises when the hard drive is working. SO I guess the second question is what should I do to get rid of the weird noises? Are there any special filters I need to use?
    You won't get rid of noises by filtering, at least not without filtering some of your music as well. It seems you just have to toy around with your wiring scheme -especially power and ground wires I think- to get rid of this.

    BTW; with that screen this is really a HUGE setup.

    white bream
    working on a trilogy: CARGO - UNIGO - MERGO
    CARGO = the Car Computer
    Intel Celeron M, [P]SDC, uBlox GPS, GPRS, WLAN, Silabs FM, RDS, TMC,
    Dual-audio, Onecable TFT, Microsize: 45 x 108 x 168mm (1.8 x 4.3 x 6.6")

  3. #3
    Variable Bitrate
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    funky low rumbling noises when the hard drive is working.
    Means your power supply probably isn't beefy enough, so that when your harddrive is accessed the sound card loses power.

  4. #4
    Constant Bitrate SuperAJ's Avatar
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    That's a lot of nice equipment. Hope you've got some sort of alarm on your car.

  5. #5
    FLAC bosstone74's Avatar
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    OPUS!

    I think I send this message about everyday!
    Get the best, Get the Opus! Save yourself some headaches...
    I've built 3 carputers, 2 had inverters...I was going to buy jeff's but he NEVER return any messages, so I bought an opus. I't s a bit more, but well worth it, you get support, a warrenty, and documentation!

    SAve up...get it, be happy!
    BossTone74

  6. #6
    FLAC cproaudio's Avatar
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    Re: Need Some Hardcore Advice (PICS)


    1. My PSU isn't enough I have to underclock the CPU to get it to boot properly else it starts to boot to Windows and then crashes or turns off. I did have an extra 64 Meg stick of Ram I also ditched to save power... SO I guess the question is who makes the smallest 150 watt DC-DC PSU? Cause the MPBS1 isn't cutting it.

    DUDE, you need to get an Opus cuz I have WAY more crap than you have and my Opus seems to be working fine for the past 4 months.

    2. I have the carputer hooked up into the MP3/AUX on my Blaupunkt through the special cable I bought for it seperately. I ran all the power down one side of my car and all audio down the other.. everything is either grounded seperately or straight grounded to the battery. I get not only alternator noise but also all kinds of funky low rumbling noises when the hard drive is working. SO I guess the second question is what should I do to get rid of the weird noises? Are there any special filters I need to use?
    What kind of amp do you have? Some amps will have engine noise no matter what you do. (MTX 5channel is one of them) Also those older caddys are prone to engine noise to begin with. You should ground all of your amps in the same spot to avoid any voltage difference betweens the amps. Also, which audio jack did you use as RCA out on the FV24? You should use the audio header on the board not the audio jacks in the back of the motherboard. the audio header will produce far cleaner sound than the audio jack in the back.
    NEW complete and updated My project with 100+ pics on 7-4-03
    If you have a Shuttle FV24 motherboard in perfect working condition for sale, please PM me.

  7. #7
    Low Bitrate Ritalin Kid's Avatar
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    I've got the original 95 Watt AC-DC PSU that came in the Shuttle case my neighbor does car stereo and he suggested just hooking up the 95 Watt AC-DC to the 175Watt inverter with the monitor.. he also pointed out my ground to the DC-DC was too long and that I might want to run an extra ground from the metal casing of the MPBS1 but regardless it's not powerful enough..

    As far as the Jack I'm using I've been using the on off the motherboard but tommorrow I'll try the headers that are with the extra USB connections..

    And better yet I have a Clifford Matrix RS2 and my neighbor is going to help me set up a relay so that I might be able to use the extra accessory button to turn the computer on remotely.

  8. #8
    Low Bitrate theedge's Avatar
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    Ground everything to the same spot, NOT the battery. Keep the gound wires as short as possible. If you ground to the frame, scrap paint off.

    Interference is caused by ground loops, differences in the voltages of the ground basically.

    For lots of advice and threads on those noise problems, check out www.caraudioforum.com

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