italie |
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MAME owes italie many thank yous, hah
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Reged: 09/20/03
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Posts: 15246
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Loc: BoomTown
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Re: Wattage in arcade boards
07/30/13 09:26 AM
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> It might be helpful if you told us your method for figuring it out, but probably not
> because it probably requires hardware and study nobody would spend hobby money or
> time on. The only time I've ever broken a board is during desoldering and I'm
> convinced that is unavoidable sometimes because of how shitily some pcbs are made.
Figuring it out would suck, if at all possible. You look it up. If it isn't listed, over supply and fuse where prudent. You can't over-supply current to a board unless it's faulty, but on the flip-side it will become faulty rather quick if you under current.
You want your voltage at ~5.08, giving just enough extra juice to keep the level above 5v on the long ass, ill-regulated power runs that arcade pcbs seem to have. Pushing voltages to 5.35 and up is either compensating for a shitty design, compensating for bad grounding/component issues, or trying to compensate for a brown out condition. All you end up doing is over-voltage the nearest ICs to the supply, shortening their life.
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