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Thread: My low cost, easy to build power supply...

  1. #11
    FLAC
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    Originally posted by SkinnyBoy:
    <STRONG>STOP COMPLAINING!!!!!!!
    you don't have to make this supply, I was just telling you that I was, and I will post how successful it was when I have finished..
    okay?? </STRONG>
    Fosgate, moahdib and myself ain't complaining, just having a laugh at your expense. We all know that linear regulators are useless for running a computer system in-car, and we dont need to be told otherwise.

    We all have the money and the sense not to bother with such pointless efforts.... if u wanna go for it tho.... knock yaself out!
    Project - GAME OVER :(

  2. #12
    FLAC Mastero's Avatar
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    Hey guys give him a break let the guy try ..... he will know himself if its right or wrong...

    I dont think this forum is made to laugh on someone here who want advice and is doing some R&D of his own ....

    Tell me has anyone here actually built a PSU with those linear chips and and had a feild test?

    .....????????

  3. #13
    Raw Wave Rob Withey's Avatar
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    Originally posted by mastero:
    <STRONG>Tell me has anyone here actually built a PSU with those linear chips and and had a feild test?</STRONG>
    Erm, I don't need to, I can do the math. Electronics isn't all about trial and error. Lots of it is maths. Switchers are a good deal more efficient, and even my switcher gets pretty hot supplying my setup (my heatsink is my entire aluminium computer case).

    Rob
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

  4. #14
    FLAC Mastero's Avatar
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    Robby how simple you want me to make this question ..

    "DID ANYONE BUILT AND HAD A FEILD TEST DONE"
    kindly answer in YES or NO only !

    I didnt ask for any theorys....or wise comments.

    Mastero

    PN: sorry in a very *****ed up mood..

    [ 12-04-2001: Message edited by: mastero ]

  5. #15
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    Well, I have now sorta made the supply it has the power good line, and it works, but I don't have a power supply able to give high enough current at about 14volts...
    any ideas of what I should do???

    There is no reason why this wouldn't work, the regulator chips can opperate at upto 125 degrees celcius, and I don't think they will get that hot only powering a P100...

  6. #16
    Raw Wave Rob Withey's Avatar
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    Originally posted by mastero:
    <STRONG>I didnt ask for any theorys....or wise comments.
    </STRONG>
    &lt;sigh&gt;

    It's your time.


    Rob
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

  7. #17
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    Originally posted by Rob Withey:
    <STRONG>

    &lt;sigh&gt;

    It's your time.


    Rob</STRONG>
    Ahh..
    now thats the thing...
    I have plenty of time to waste, and I don't think that I am wasting it..
    About 8 weeks actually..
    I have nothing better to do, and so far, all I have spent is $1.15 and about 4hours..
    It this supply doesn't work, I can always use the 4049 for another supply..
    I like smiling..


    Yeah, I forgot to menchion that I couldn't get the digital camera today, so won't be posting the pictures untill tomorrow night..

    [ 12-04-2001: Message edited by: SkinnyBoy ]

  8. #18
    Maximum Bitrate
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    Skinny, what about when you're actually in car? The linear regulators need an input of like at least 12.5V to give you a 12V steady line, so you're limiting yourself to only being able to use your computer while the power supply is turned on?

    and what happens when the voltage drops? you're going to feed 8V to your hard drive and cause it to go wacky?

    I was reading up on "the 7 power supply sins" and it's quite interesting... I'll post a link when I can find it...

    actually I highly recommend that you head over to national's power website to get information about the snags of making a simple power supply.

    Don't forget that crappy power can kill a computer really quickly.
    IN DEVELOPMENT -- '96 Mustang, lilliput with PII/450 laptop, custom DC-DC power supply, 60GB; Garmin GPS; 802.11g; compact keyboard, small graphical LCDs, OBDII.

  9. #19
    Retired Admin Aaron Cake's Avatar
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    Cool

    Originally posted by Telek:
    <STRONG>Don't forget that crappy power can kill a computer really quickly.</STRONG>
    After replacing 3 hard drives because of a defective Arise DC-DC, I'll second that!
    Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
    Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
    "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

  10. #20
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    The linear regulators need an input of like at least 12.5V to give you a 12V steady line, so you're limiting yourself to only being able to use your computer while the power supply is turned on?
    and what happens when the voltage drops? you're going to feed 8V to your hard drive and cause it to go wacky?
    Well, I only wanted to use the carputer while the car is running, as I am going on a LONG driving holiday in 2 weeks..
    If the battery voltage drops, it only drops to about 11volts, and thats while the engin is cranking, and with a 11volt input, the power supply outputs about 10, and this is enough to keep the mobo going, but the HD will spin down, but seeing as I am not intending on using the carputer without the car running, this is not a problem..


    Don't forget that crappy power can kill a computer really quickly.
    MAN!!!!!!
    its a friggin P100 underclocked to 75, it came out of a bin, do you really think I care it I trash it??
    Same with the HD, its 1GIG!!!
    also came from in a bin..

    [ 12-04-2001: Message edited by: SkinnyBoy ]

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