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John wrote:
wrote:


isn't there a step down treansformer taking 110vAC down to 12vAC then
rectified to 12vDC????


Steve
A&P and Computer Guru (and very interested in your Idea)


All kinds unfortunately this is for aircraft use, he's starting with 12v DC
(transformers don't work with DC) and needs to get +-12v +5 and +3.3v all
DC.
John

John,

I think you'll find that the -12V is used only in "legacy" PC design for
ISA busses, or serial ports (which he probably isn't using).

Evan
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