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Thread: you dont necessarily need a voltage regulated PSU

  1. #21
    Maximum Bitrate none's Avatar
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    This is called a tank circuit. Many members here have used them with great success, some even using a battery isolator rather than the cheaper diode. The specifics of the circuit don't matter (some have even had success with capacitors instead of batteries), it is still called a tank. Usually they are intended to smooth out voltage dips, but can also be effective against voltage spikes (depending on isolator, but not as safe as a voltage regulator in this regard.)

  2. #22
    Variable Bitrate nzKAOSnz's Avatar
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    Quote Originally Posted by MatrixPC
    I "think" this is what he use.
    - el cheapo snap-on style DC-DC PSU (unregulated 12V line) that some of you guys use with VIA mobo and laptop HD, CD/DVD ROM.
    From what i can gather, think PW120/PW200

  3. #23
    Constant Bitrate GWRedDragon's Avatar
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    Quote Originally Posted by The Grinch
    This is a nice solution unless you're like me and ocassionally run a mission critical app. My setup could use an extra battery though.
    What's mission critical in your carpc? Do you use it to set the cruise control or detect collisions or something?

  4. #24
    Variable Bitrate The Grinch's Avatar
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    Quote Originally Posted by GWRedDragon
    What's mission critical in your carpc? Do you use it to set the cruise control or detect collisions or something?
    I have a OBDII programmer. A PC failure during the write phase would render the PCM (or ECM if you prefer) useless and the car would no longer start.
    Carputer progress meter: [-----|]
    Carputer gadget meter: [--|---]

  5. #25
    Newbie popuptoaster's Avatar
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    I understand all of the idea behind this system, i have been running my ICE like it for years, but im not sure what this "snap on psu" is, anyone post a link so i can have a look please?

  6. #26
    Variable Bitrate nzKAOSnz's Avatar
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  7. #27
    Newbie popuptoaster's Avatar
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    sweet, thanks, that can be used on a full sized descktop pc too?

  8. #28
    Variable Bitrate nzKAOSnz's Avatar
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    hmmm.
    depends on whats in that pc. Also, as it is snapon- you may have to get creative with your wiring to run a hdd.

  9. #29
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    should be fairly low powered, im hoping to pick up something "out of date" for virtually nothing which is why im going for a full size one, as i dont have any room constraints.

    be running a 5.1 sound card and a WiFi card along with a DVD drive, so hopefully it should cope.

    I dont understand the creative wiring bit? Im handy withy a soldering iron, but not so hot on actuall electronics theory.

  10. #30
    Low Bitrate
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    I am also confused how the +12V can be a "smooth 12V". Is this only when the car is off? The alternator does not charge at 12V. If the the alternator is connected to the battery, which is connected to the PS it will also be at the alternator potential.

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