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  • need help on power

    Hi I need to take my car's power (12 volts DC) and get 18 volts DC at 3 amps. This isn't my field. Is there a circuit to do this and what and how would I need to make it. TIA
    Awol

    my $0.02 cents (value is based on the intelligence of the person reading this message)

  • #2
    well, you would do it with quite a bit of dificulty....

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    • #3
      Skinnyboy, thats very nice to know but doesn't help me at all. I don't care if its hard or simple hell I know it can be done I see car adapters for laptops all the time and every laptop I have seem uses more than 12 volts of power.
      Awol

      my $0.02 cents (value is based on the intelligence of the person reading this message)

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      • #4
        A simple inverter circuit connected to a custom transformer will do it just fine. You can wind a 2:1 transformer, and make an oscillator to feed the input. See http://www.aaroncake.net/circuits/invertr.htm for an example of an inverter. The transformer can be rewould for an 18V output, and then rectified. Note that this circuit is very inefficient. A better idea would be a higher frequency oscillator and transformer.
        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."

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        • #5
          http://www.national.com/appinfo/webench/power/SS/SS.cgi?flow=power&step='1A'

          Nationals webbench page..

          In put the values that you need and it should beable to spit out a circuit at you. This should be an ok solution as long as you dont need heaps of current.
          [SIZE=1]'91 Nissan Stanza

          [XXXXXXXXXXXXXXXXXXXX] XX% Completed -
          Car Totaled and i bought a 20G mp3 player

          http://machs-fuel.tk
          a DIY video projector page

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