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    12 Volt to 220 Volt Inverter 500W

    :) Here is Circuit 12 Volt to 220 Volt Inverter 500W. http://circuit-electronic.blogspot.com/2007/04/12-volt-to-220-volt-inverter-500w.html use Transister only. (No IC)
  2. E

    make a PCB by DryFilm.

    Easy to make PCB by Dry Film. Negative Dryfilm Photo Resist Instruction for PCB prototyping. http://eanic.blogspot.com/2007/01/negative-dryfilm-photo-resist.html Good luck :)
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