n64 portable question topic

Includes but not limited to: SNES, Genesis, Sega CD, PlayStation 1, Nintendo 64, Dreamcast, Game Gear and I guess the Virtual Boy.

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Cojiro
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Re: n64 portable question topic

Post by Cojiro » Thu Jun 09, 2011 8:30 am

How smart is it to have hot glue on the mobo? right now i have it covering the power and a/v connections, and am having second thoughts.
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hailrazer
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Re: n64 portable question topic

Post by hailrazer » Thu Jun 09, 2011 8:44 am

That's fine . You just don't want it holding major components on. Then if it gets Armand melts they might fall off and short out.
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Re: n64 portable question topic

Post by Cojiro » Fri Jun 24, 2011 7:40 am

need to know about 7808 regulators. first, i saw a diagram with one that had two resistors soldered on, how necessary are those? also, some are rated at 1A, 1.5A, etc. what current do you need, or does it matter (1-1.5A)?
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Re: n64 portable question topic

Post by Snipeye » Fri Jun 24, 2011 8:53 am

7808 is a linear regulator, the resistors might have been current limiting, without seeing I don't know for sure. You don't need them in most applications. As for amperage, it depends on how much you're trying to draw. If you want to use 1.25A, then the 1A won't work for obvious reasons.

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Re: n64 portable question topic

Post by Cojiro » Fri Jun 24, 2011 9:12 am

i would be using it for the psone screen and nothing else.

also, i am fully aware of the regulators that use potentiometers and don't burn off energy as heat, but 9v to 8v isn't that much of a step anyway and i guess i'm just trying to figure out more about 7808 in particular, and how good of an option they are.
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Re: n64 portable question topic

Post by Snipeye » Fri Jun 24, 2011 1:43 pm

What exactly are you getting 9v from? Wall adaptor or something?

Anyway, the voltage dropout on a 7808 or usually 1.5-2V, so I don't think it'd work to drop it from 9v. I'd use 10 at least to stay safe.

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Re: n64 portable question topic

Post by Cojiro » Fri Jun 24, 2011 6:27 pm

It's a universal dvd player battery.

and so you're saying that the psone can't take 7v?
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Re: n64 portable question topic

Post by bassmasta » Fri Jun 24, 2011 10:23 pm

He's saying that because a 7808 is a low-dropout linear regulator, the input voltage needs to be at least 1.5V to 2V above the output voltage.

The psone screen quits out at around 7V, I'm not sure exactly where, but I don't know if it can run on 7V.
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Cojiro
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Re: n64 portable question topic

Post by Cojiro » Mon Jun 27, 2011 12:59 pm

Awesome, thanks for the info.

Another question:
I think I burned out the resistor where I connected right audio, because it's not playing. potential fixes for this? Is there an alternate place to wire to, or could I bridge the left and right audio pins at the cartridge slot?
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Re: n64 portable question topic

Post by Snipeye » Mon Jun 27, 2011 1:25 pm

If you do bridge left and right audio pins, you can't have stereo sound - useful for games like Mario, etc, where you can 'hear' sound from the direction it's coming.

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Re: n64 portable question topic

Post by Cojiro » Mon Jun 27, 2011 2:45 pm

this is true, but it's going into a portable anyway, the speakers will be somewhat close together. and if there is another option, i would do that. but if no one has another option for me, it would be safe to bridge right and left audio pins at cartridge slot, so it would be sort of like setting the n64 to mono audio? would that be bad for the system? the absolute worst thing would be to leave it like it is and only hear half the sounds on some games.

EDIT: sorry, it wasn't clear in the first post, but what i meant was i burned the resistor on the n64board, not the screen. i'm not getting right audio period from the n64.
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Re: n64 portable question topic

Post by iHackedit » Mon Jun 27, 2011 5:08 pm

Whats a good cheap putty to work with the case, what sandpapers should I use ( work from a gritty one down to a not so gritty one?) and what sort of paint should I use? (the paint is going to be soe blue colour if it helps...)
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Re: n64 portable question topic

Post by Cojiro » Tue Jun 28, 2011 2:52 pm

For paint, krylon fusion is a good way to go.

This is what I was talking about in my question. For some reason, the right audio is not working. Here is a diagram of the cart slot that I made in like 40 seconds.
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Is it safe to bridge these two pins, feeding the signal for both the right and left audio into the left audio pin? I don't care about stereo, I just want to be able to hear all of the audio.
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Re: n64 portable question topic

Post by Snipeye » Tue Jun 28, 2011 5:07 pm

Hypothetically, you can, yes. Still think it would be better to trace back right audio to somewhere that it does work, but it's up to you.

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Re: n64 portable question topic

Post by Cojiro » Tue Jun 28, 2011 8:59 pm

i'm not exactly sure how this works. sorry for my ignorance. i messed up the resistor right before the pin for audio right where the cord usually plugs into the back of the n64. is that resistor not important?

thanks a bunch
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