n64 portable question topic

[Cojiro]

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.
thanks

[hailrazer]

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.

[Cojiro]

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)?
thanks

[Snipeye]

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.

[Cojiro]

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.

[Snipeye]

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.

[Cojiro]

It's a universal dvd player battery.

and so you're saying that the psone can't take 7v?

[bassmasta]

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.

[Cojiro]

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?
Thanks

[Snipeye]

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.

[Cojiro]

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.

[iHackedit]

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...)

[Cojiro]

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.


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.

[Snipeye]

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.

[Cojiro]

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