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Thread: found a new dc to dc power supply for VIA EPIA owners

  1. #21
    Variable Bitrate
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    I have posted this on a couple of other threads that deal with this power supply but might as well state it again. I have used this power supply wired directly to my car's wiring. If you look around on their website you can find considerable documentation by the designer on using the power supply for just this type of operation.

    With that said I do have a problem that I am still trying to fix, which is what appears to be alternator noise that is apparently making it through the Epia motherboard and out the composit connector and resulting in wavy lines that vary with engine RPM. The screen is still readable, it is just annoying to have these lines. It does appear as if the guy is designing a regulator that hopefully will fix this and regulate the 12volt DC as well as offer some shutdown features.

  2. #22
    Maximum Bitrate 00CericaRuss's Avatar
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    well.. I finally got this thing working in the car, and, I haven't had a single problem w/it

    I got the PW70, EPIAm9000, 512mb RAM, slim slot dvd/cdrw, notebook drive, various usb devices.

  3. #23
    FLAC guitar333's Avatar
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    Quote Originally Posted by 00CericaRuss
    well.. I finally got this thing working in the car, and, I haven't had a single problem w/it

    I got the PW70, EPIAm9000, 512mb RAM, slim slot dvd/cdrw, notebook drive, various usb devices.
    how does the pw-70 handle all that, successfully? Can you successfully burn a cd with no problems? Thanks
    92 Taurus SHO - Daily driver - Epia M10000 80GB 512mb 7" touchscreen, Opus PSU etc

    93 Black SHO - 30mpg cruiser

    90 Silver SHO - 419whp fun/project car, CarPC to come (for tuning)

  4. #24
    Maximum Bitrate gizmomkr's Avatar
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    Some food for thought on the PW-70 / 120 (depending on who you buy it from, same board though)
    It does virtually nothing to the 12v line...

    Because its not being filtered / regulated - the 12v line is limited only by the overload circuit & the traces on the board.

    from what I can tell, 00CericaRuss is using slim to none of the 12v side of the unit, so that leaves the supply pretty free for the 5v side. Also the major components (hard disk, cd drive) he is using devices designed for laptops. All this stuff is designed for low power consumption.

    Think about your laptop power source for a moment - most are 75 to 90 watts. and that includes the LCD .

    Add all that up, with those parts, and a pw-70 you have plenty of power to spare.

    All that being said I blew my first pw-70 in the second hour of testing it. It was replaced quickly, and easily (thanks to that ebay guy, and ituner) and I was quickly able to blow the fuse on my second unit days later. Thats about when I called Kris and ordered an opus.

    The pw70 is what it is - its not going to damage your stuff (but its not going to stop a spike or sag for doing damage ethier) It seems to be easilly foulable... not ruged or reliable. but hey, its like 50 bucks... You get what you pay for.

    If anyone wants it - I did a VERRY detailed write up on the pw-70 unit on my site, lots of photos and documentation of the cut offs / ratings , Etc. http://www.hjnetworks.com/car/pw120/
    Gizmo-
    Techonlogy on Wheels
    http://www.hjnetworks.com/car

  5. #25
    Maximum Bitrate 00CericaRuss's Avatar
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    I haven't tried burning a cd yet... I literally just threw it in my car yesterday after very little bench testing/configuration for a car show.

    as far as the hard drive, it only runs off 5v, the dvd/cdrw does have the 12v connector on it, but I haven't followed the traces to see if it's going all the way to the drive.
    For spikes/sags, I currently run an optima yellow top battery, underdriven alternator pulley, and have a 2 farad capacitor which keeps everything pretty steady. I rarely see anything over 14.2v on the readout on my cap. I also had it running for about 4-5 hours straight yesterday at the car show, and it all went well.

    As for price, I didn't pay for it. My dad knows the folks at Ituner since my stepmom does PR for VIA, he got a few to test with, but was having issues w/it running full size hard drives/dvd/cdrw drives, so he had to go for the beefier one that can handle those drives (he's using it w/the ac adapter though)

  6. #26
    Maximum Bitrate gizmomkr's Avatar
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    VIA has PR people, I figured all they needed was this forum
    Gizmo-
    Techonlogy on Wheels
    http://www.hjnetworks.com/car

  7. #27
    Maximum Bitrate 00CericaRuss's Avatar
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    hah... she already knows about the forum, but umm.. she doesn't really come on and look much... oh well

  8. #28
    Low Bitrate pc832's Avatar
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    Unhappy Will This Work?

    What about this

    http://www.mini-box.com/pw-70.htm

    With This

    http://www.mini-box.com/itps.htm

    I hope it does....I've already ordered it!

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