12VDC to 400VDC Voltage Booster

Discussion in 'The Projects Forum' started by physicsguy, Feb 9, 2013.

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  1. physicsguy

    Thread Starter New Member

    Feb 9, 2013

    I'm kinda new to designing electronics circuits. I'm currently working on building a coil gun, for my end of semester presentation for my E&M class; but I'm having some trouble. I'm using five 400V 220 μF caps, and I've read that I will need a power source of about 400V to charge them fully. I'm using D batteries as the power source (currently 8, for 12V total). Is there a way to cheaply (under $20ish) to boost the batteries up to the required voltage? If I need to increase or decrease the input voltage, I can. Any help is GREATLY appreciated. Thanks for your help.

    p.s. I'm actually hoping of bringing this in to a local elementary school, when I give a presentation on magnetism, on February 19th. So if there is a quick way to accomplish my need, it would be awesome!!
  2. Audioguru

    New Member

    Dec 20, 2007
    POWER= Volts x Amps. We know the voltage is 400V but what is the current?

    You can use a power oscillator driving a transformer to convert 12V to 400V. Then rectify the AC into dC.

    Maybe the 400V current must be 1A. Then the 12v battery must supply (400V/12V) x 1A= 33.3A! No way that D cells can supply that high current.
  3. mattbullet


    Nov 29, 2008
    This is my first post also.
    I have built a coil gun and rail gun in the past. They are really awsome.
    I CANT in good concience help with a possible extra hole in some young
    School kid.
    Besides I think this is a banned topic.

    LOCK OUT - TAGOUT that monster.

  4. Audioguru

    New Member

    Dec 20, 2007
    I forgot that there are monster terrorists all around that want us to show them how to make a weapon.
  5. bertus


    Apr 5, 2008

    I am closing this thread as it violates AAC policy and/or safety issues.

    6. Restricted topics.

    The following topics are regularly raised however are considered “off-topic” at all times and will results in Your thread being closed without question:

    • Any kind of over-unity devices and systems
    • Automotive modifications
    • Devices designed to electrocute or shock another person
    • LEDs to mains
    • Phone jammers
    • Rail guns and high-energy projectile devices
    • Transformer-less power supplies
    This comes from our Tos:
    Terms of Service
    There will be enough sites where automotive questions can be discussed :
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