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circuit diagram needed.

Discussion in 'General Electronics Discussion' started by Kaash, Feb 3, 2014.

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  1. Kaash

    Kaash

    10
    0
    Aug 16, 2013
    hi guys,
    i want this circuit kindly suggest me circuit diagram
    actually i want to run my computer's motherboard directly from car battery+charger,, so that i want this circuit,,
    input voltages = 12v-14v and 40A(Car battery)
    help plz,,

    k.png
     
    Last edited: Feb 4, 2014
  2. GreenGiant

    GreenGiant

    830
    6
    Feb 9, 2012
    Why are you trying to do this?

    You are going to need quite a large 12V supply (15A or more) and this thing is going to get HOT. To be honest this looks exactly like a PC power supply output, why not use one of thos connected to the mains?
     
  3. davenn

    davenn Moderator

    13,561
    1,856
    Sep 5, 2009
    totally agree

    buy a computer PSU


    Dave
     
  4. Kaash

    Kaash

    10
    0
    Aug 16, 2013
    actually i want to run my computer's motherboard directly from car battery+charger,, so that i want this circuit,,
    help plz,,
     
  5. Kaash

    Kaash

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    0
    Aug 16, 2013
    plz don't suggest me inverter of 12v-220v because it wastes so much energy,,
     
  6. GreenGiant

    GreenGiant

    830
    6
    Feb 9, 2012
    You are going to waste just as much, if not more than an inverter converting voltages down to 5 and 3.3V

    Unless you purchase a massive one, you would onlt get a couple hours (at best) out of a car battery, efficiency would actually be about a 1:1 comparison (90% on a good inverter, 89-92% on regulators and things) and price would be significantly lower using an inverter (total around 100 for inverter and supply, vs upwards of 500 for parts)
     
  7. davenn

    davenn Moderator

    13,561
    1,856
    Sep 5, 2009
    there are puter PSU's designed to run off a 12V battery, I have used them

    go buy one

    Dave
     
  8. donkey

    donkey

    1,286
    56
    Feb 26, 2011
  9. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,363
    2,758
    Jan 21, 2010
    Such as this.

    That is just an example, not a recommendation.

    edit:donkey beat me to it
     
  10. donkey

    donkey

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    56
    Feb 26, 2011
    yes but yours is much cheaper
     
  11. Kaash

    Kaash

    10
    0
    Aug 16, 2013
    im from pakistan, i.e no ready made device available here,, thaty why in asking for circuit diagram..
     
  12. davenn

    davenn Moderator

    13,561
    1,856
    Sep 5, 2009
    a circuit for a PSU like that is pretty complex and unless you are a very skilled technician ?, its probably out of your abilities

    I personally wouldn't even bother trying to build one when they are so easy to buy

    you are still better to buy a ready made unit from a computer shop or eBay or Amazon etc
    I assume you have electronics stores or computer shops there ?
    can you shop on eBay ?

    here's just one of many examples available http://www.ebay.com/itm/MINI-ITX-DC...-/170930355978?pt=PCA_UPS&hash=item27cc3e3f0a

    cheers
    Dave
     
    Last edited: Feb 5, 2014
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