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Thread: Too much power consumption with 300w - Need help

  1. #1
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    Oct 2001
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    Anniston, AL
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    Post Too much power consumption with 300w - Need help

    I'm having a huge power problem with my carmp3 system.( BOOKPC, 500mhz, 40gb, 256mb ram, 5" crt, 300watt jensen inverter, USB Keyspan remote) The thing ran fine until I tried to add a USB Earthmate GPS to the system. The inverter whines when everything is plugged in and generally screws up. If I unplug my keyspan remote it fixes the problem, but the inverter still whines now and again. So, can I make my computer draw less power or give my computer more power to work with? I've seen all the stuff on DC-DC conversion, but when it comes to wiring stuff I suck. I've also seen threads on removing some filters on the power supply, but like I said I suck at that stuff. Is there an easy way to do anything? Please help!

  2. #2
    Variable Bitrate
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    Jul 2000
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    Jackson, MS, USA
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    Either you'll have to get rid of GPS or loose some power. Maybe you can under clock the CPU a 100 mhz, or if it has a floppy drive, unplug that. What about the cdrom, do you use it? if not unplug it. 256 of ram, is that 1 stick or 2 128 sticks? If so take out a stick and see if anything changes. You can also drop the voltage on the CPU. What is it, 2.2V? Try 2.15 or 2.1V and see if it still boots.

    [ 12-27-2001: Message edited by: Squeezer ]
    24 y/o w/ Silver/Red
    2000 Honda S2000

    http://www.squeezer.net

  3. #3
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    Jul 2001
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    Post

    Or, get a bigger inverter??

  4. #4
    Constant Bitrate
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    Jun 2001
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    Washington State
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    I can't say this for sure because I have never used any of their inverters, but Jenson SUCKS! I have had some experience with their amplifiers and stereos and have yet to have a good experience. In each case the stuff works fine (although not as well as they claim) but then craps out after about 8 months worth of use.

    Good luck, and I hope your experience can work out better than any of mine did.

  5. #5
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    Oct 2001
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    Anniston, AL
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    Anyone know of any good inverters that go over 300 watts? I've purchased 3 different inverters, and they all suck. (Especially the Jensen) I'd rather have some input before i lay down another $100. Also would underclocking my processor really help that much with the voltage? I

  6. #6
    Maximum Bitrate
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    May 2001
    Location
    Cincinnati, Ohio
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    Stop by RadioShack we (I'm a store manager there) have a true 300 watt for $99.99 that has 2 AC outlets. It has a fan and a fuse. Should be much better than a jensen.

  7. #7
    Variable Bitrate
    Join Date
    Mar 2001
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    Post

    Modify your GPS to get power from a seperate dc-dc PS (a very small one, just for the GPS). If it takes ~12vdc natively, then just hook it up to the switched car battery.

    If you've really spent hundreds on inverters.. well.. that sucks. You can get an excellent DC-DC power supply that does 250W for $180. I spent $25 on my 150W inverter (which was more than enough) before replacing it with a DC-DC.
    Player: Celeron II 633MHz, 256MB RAM, 20GB IBM 9mm 2.5" Laptop HD (180G/2ms), onboard ethernet/sound/video/tvout, 10"11"x3" case, MPBS1 70W DC-DC PS w/auto-shutdown controller, in-dash lighted switches, 7" NTSC TFT widescreen in-dash LCD, touchscreen, rear-window brake light installed Garmin GPS35 GPS, credit card sized IR remote w/IRMan, mini-wireless keyboard/mouse (sits under seat), PowerMate black knob, MP3s and GPS Navigation (Winamp, CoPilot, SA8.0).
    Car: 1993 Nissan Maxima, Black Emerald

  8. #8
    Variable Bitrate
    Join Date
    Jul 2001
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    392

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    I've yet to see a dc-dc ps that can power a bookpc the +5 is fine but for some reason book pc's draw a ****load of power on the +12 rail....

    [ 12-31-2001: Message edited by: Ces///M3 ]

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