N64 power

omegabullit · Post by **omegabullit** » Wed Aug 11, 2004 12:27 pm

A LONG time ago i started planning out a N64 portable. NiN_NiN was helping me with the power. At the time, I remember needing a 7805LD and a 3.3V LDO. This way I could put a certain number of volts straight in to N64, the 3.3v LDO, and the screen. Sorry I have no numbers, but Im going off memory here. Could someone sorta sum up what I need to power the N64? Thanks.

Post by **gannon** » Wed Aug 11, 2004 4:07 pm

yeah, a 3.3V regulator is all you need, unless you want to run the n64 off of less than 7.2V, then you'll also need a 5V ldo.

omegabullit · Post by **omegabullit** » Wed Aug 11, 2004 4:09 pm

So what would suggest running in, having batteries set up for 12v, run them into the 12v line and into the 3.3v regulator which goes into the 64?

Post by **gannon** » Wed Aug 11, 2004 4:12 pm

the 12V line on the n64 only leads to a 7805, so it only requires 7.2V. IF you replace the 7805 with a 5V ldo regulator you can run the 12V line off of less than 7.2V.

omegabullit · Post by **omegabullit** » Wed Aug 11, 2004 4:17 pm

Alright. That way I could figure out what voltage I needed for my screen, that way I could just run watevers going into that into the N64 also. Convinient

omegabullit · Post by **omegabullit** » Thu Aug 12, 2004 4:37 pm

Well, I bought a 7805 5v regulator, and I bought an adjustable regulator. The old guy at radio shack tried to explain to me how to use it, mentioning something about using a pot from the adjustable pin, that leads to the Voltage Out Pin. I was wondering, could I jus run a resistor from the adjustable to the Voltage out pin? I'm not sure if anyone has delt with these before, but I figuerd I would ask.

Post by **gannon** » Thu Aug 12, 2004 4:55 pm

yeah, since all a pot would do is allow you to adjust the Vout.

omegabullit · Post by **omegabullit** » Thu Aug 12, 2004 6:00 pm

so wat should i get? cant i jus replace the pot with a specific resistor that will put out the 3.3v that i need, that way not having to worry about the adjuster?

Post by **gannon** » Thu Aug 12, 2004 6:03 pm

a resistor is fine, although I'm not sure what resistance you need to get the 3.3V out. Also, is the amp level of that regulator high enough?

omegabullit · Post by **omegabullit** » Thu Aug 12, 2004 7:41 pm

i think so, heres the maximum ratings:

power dissipation 15W
input-output
voltage differential 40v
load regulation .1%V
fine regulation .01%v
ripple rejection 80dB

gamer2 · Post by **gamer2** » Sun Aug 15, 2004 4:46 pm

Is it Smart to NOT use a 12v-3v power converter and just use 3v and 12v instead

omegabullit · Post by **omegabullit** » Wed Aug 25, 2004 5:31 pm

Why does it matter? I really dont feel like having to put 12v into this thing. Plus, I already bought the 7805, so I might as well go for it.

omegabullit · Post by **omegabullit** » Thu Aug 26, 2004 9:43 pm

Well, the adjustable regulator is not working. Way to much of a pain. Of course radioshack.com and the stores dont have a 3.3v regulator. I've heard people talk of a car adaptor that does it. Any info on this?

Post by **gannon** » Thu Aug 26, 2004 9:46 pm

The car adapter has a 1 amp limit, so you'll probably need to use 2 of them, and I think they cost at least $10 a piece. I'd recommend buying one from mouser.

omegabullit · Post by **omegabullit** » Thu Aug 26, 2004 9:47 pm

Is it just like, a game adapter that lets you plug into the cigarette lighter?