amperage vs. voltage...

csurban · Post by **csurban** » Sun Oct 01, 2006 6:20 pm

will a N64 by any chance run longer on 8 1.2v 2500 milliamp AA batteries =9.6v at 2500 milliamps vs. 6 1.2v 2500 milliamp AA batteries =7.2v at 2500 milliamps? I got them all wired as to increase their voltage not amprage and this output goes directually to a TI 3.3v switching regulator converter, directually to the 12v input in the N64, and directually to an UNMODDED PSOne screen. I am wondering if the N64 + PSOne screen will accept this higher voltage as more net work and save amps or will they just burn off the extra voltage a heat?

Post by **gannon** » Sun Oct 01, 2006 6:34 pm

Since you're inputting into a 3.3V non-linear regulator, it should run slightly longer, although all the linear regulators will be producing more heat as well (the 7805 on the n64 and the 2 7805s on the lcd).

csurban · Post by **csurban** » Sun Oct 01, 2006 10:07 pm

so with the specified setup, it is better to go with 6 batteries?

Post by **Skyone** » Sun Oct 01, 2006 10:37 pm

Yep! However, you won't get too much time out of it, any way. (Ah rating is low)

csurban · Post by **csurban** » Sun Oct 01, 2006 11:12 pm

isnt 2.5 amps for a AA pretty reasonible?

Post by **gannon** » Sun Oct 01, 2006 11:28 pm

Yep, mine are only 2250mAh, should be able to run the n64p for 2+ hours on them.

Post by **Skyone** » Sun Oct 01, 2006 11:50 pm

I thought he was talking about the whole portable, not just the N64. And by low amperage, yes, I am talking about with a screen and all.

Post by **gannon** » Mon Oct 02, 2006 12:43 am

Oh yeah, didn't notice he said unmodded lcd, guess it'd be 1-1.5 hours then

csurban · Post by **csurban** » Mon Oct 02, 2006 4:37 pm

Im ok with the low life of a bettery pack because it is going to be external and changible. When one runs low, ill just put in another one!