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Feb 18, 2015 at 13:57 comment added Nazar @brhans Right, I know only one application of transforming voltage from 12V to 220V - back in time they had such devices to power lamp-based car-radios. So, first 12VDC was converted to 12VAC and then stepped up to power lamps in the radio. Thus, maybe the OP missed the trivial concept that transformers work with AC only.
Feb 18, 2015 at 13:50 comment added brhans @Naz A transformer which runs off DC? Edison would have killed for one of those ...
Feb 18, 2015 at 13:48 comment added Nazar I might be mistaken, but I think that OP plans to make a transformer to run off of 12VDC? Do not know any sources of 12VAC.
Feb 18, 2015 at 13:05 history answered Andy aka CC BY-SA 3.0