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Crazy project

Discussion in 'Cases, Modding & Electronics' started by MohawkAngel, Jun 21, 2010.

  1. MohawkAngel

    MohawkAngel New Member

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    I just got an idea this morning after not sleeping for over almost 24 hours. When I don't sleep my brain overheat and I become a mad scientist :p

    STEPS

    1- I wanted to get a 280W psu get rid of all the wires that dont produce 12V and keep also the grounds.

    2- I would join all the yellow +12v wires to get the nominal 19amps of that PSU and join all the grounds together.

    3- Solder a 12v amps gauge to it in line with the yellow wires and a 12v voltage gauge in parallel

    4- Put alligator clamps on each end of the 2 big wires ending up with a group of 12v and ground

    5- Use is as a car battery charger for quick charging instead of using my 2amps charger I got from dad.

    What are your opinions?
  2. Sasqui

    Sasqui

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    That's thoeretically 20 amps @12v, you'll need a pretty beefy wire (like 8 gauge) and connections: http://www.powerstream.com/Wire_Size.htm

    So joining all the yellow wires togehter and grounds together should give you the equivalent.
  3. MohawkAngel

    MohawkAngel New Member

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    all the wires will be clamped together directly to the alligator clamps. I already got those 20 amps clamps and even 30 amps.
  4. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    I would do a couple of things.

    1) Put a current limiting curcuit in-line so that you can reduce the output current to 2 or 6 amps so that you can charge smaller 12v batteries (ie. lawnmower, atv, etc)

    2) Run it through a charge controller so that you do not overcharge the batteries and to prevent the battery from feeding back into the curcuit.
  5. MohawkAngel

    MohawkAngel New Member

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    Most of ATV, lawn tractors and small engines stuff in Quebec are on 6 volts.
    I dont wanna limit that if i would limit i would just use the small i already got :p
    For the circuit breaker ill ask to my bro hes in electronic engineering.

    Thx for sharing your opinion and advices
  6. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    Are you sure about that? Eveything I own that uses a battery has a 12v battery in it.
    (ATVs, scooters, cars, boat etc.)
    It's rare to find something with a 6v battery these days.
  7. MohawkAngel

    MohawkAngel New Member

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    Really sure bro :) I repair them hehehe
  8. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    Okay ... lol. I believe you. Just pretty rare here in the states I guess.

    I got a 15 watt (12v) solar panel and a charge controller to top off my batteries.
    Works great when the sun is out. :toast:

    It would, however, take about a week to charge a dead car battery as under optimal conditions it puts out about 49 amps in 7 days. heh
  9. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    I do know that AthlonX2 used a stock PSU to charge a dry cell for a car amplifyer (capacitor), I dont see why it shouldnt work for a battery.
  10. Fourstaff

    Fourstaff Moderator Staff Member

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    I think its a great idea on paper, good luck and post some pics! Just don't burn your house down.

    I heard PVTCaboose did the opposite, using a car battery to power his rig.
  11. MohawkAngel

    MohawkAngel New Member

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    Last edited: Jun 21, 2010
  12. MohawkAngel

    MohawkAngel New Member

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    Project done ! It works.
    Last edited: Jun 22, 2010
  13. n-ster

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    no pics? :cry:

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