N64 Portable+3.3V DC-DC converter diagram

timmeh87 · Post by **timmeh87** » Tue Dec 20, 2005 10:36 pm

i would personally not believe people who said amplifier circuits dont work, they are probably incompetent

if i ever get my hands on an old n64, ill try it.

sniper_spike · Post by **sniper_spike** » Tue Dec 20, 2005 10:45 pm

Soo.. Is there no way to mod my N64? Is it then too late of a revision to be able to perform any kind of mod on it? You guys still aren't answering my question!

timmeh87 · Post by **timmeh87** » Tue Dec 20, 2005 10:57 pm

go and find out what chip you have to get the RGB off of. then go look at your 64. is the chip there?

Code: Select all

if (chip == "there")
    {preform_mod(RGB)}
} else {
    curse();
}

sniper_spike · Post by **sniper_spike** » Tue Dec 20, 2005 11:08 pm

Damn, a C++ program, or part of it, I have to obey it's every line. Or else!

Anyway.. If you read one of my previous posts you'll realise I have a different chip than which is required, not PAL, but an NTSC system that has the wrong chip, unlike what the GamesX site said (All N64's except PAL systems being moddable).

timmeh87 · Post by **timmeh87** » Tue Dec 20, 2005 11:30 pm

if it dosent have the chip that they talk about in the explanation for how to get RGB, then you basically cant do it. unless you can somehow figure out what the mysterious other chip does and how it works. which maybe possible. look for other tutorials?

and techncially its C, theres nothing ++ about it.

nos_slived · Post by **nos_slived** » Wed Dec 21, 2005 3:37 am

OMG, there's a parse error in that there program! Come on sniper, let's not jump to conclusions, that could be one of many different languages.

BTW, I basically relearned most of C++ tonight, while I was writing a password protection script to run on an open port.

sniper_spike · Post by **sniper_spike** » Wed Dec 21, 2005 8:18 am

I suppose I'll use S-Video then. Today I'm finally going to go to Active Electronics to pick up a 78S40 switching regulator among other things. And then once the Psone screen arrives I can really start building!

timmeh87 · Post by **timmeh87** » Wed Dec 21, 2005 10:10 am

nos, is there really an error...? i did notice im missing a smicolon. goddamned semicolons. i only learned c this year and im still not remembering to put them in on the end of every line. sigh*. i miss VB

Post by **marshallh** » Wed Dec 21, 2005 2:02 pm

Haha!! I write VB comments with // and I never put semicolons on my Java programs

I get VB, Java, and C so mixed up it kind gets hard to write code...

nos_slived · Post by **nos_slived** » Wed Dec 21, 2005 2:54 pm

I always forget about the seperators(semicolons in this case) when I'm scripting in C/C++, PHP, and JS. JS doesn't matter, because it will usually run if everything's on a new line, but C/C++ and PHP both require it. With Bloodshed Dev-C++, I get close to pulling my hair out whenever I get that brown error bar over a line of code, and I screem whenever I get those damned server generated PHP errors!

sniper_spike · Post by **sniper_spike** » Wed Dec 28, 2005 3:16 pm

Well I just got back from Active, and they didn't have the LED's for the blacklight mod (well they had 1, but I needed 3). I'm also short a SCSI cable (to do the cart slot relocation), and a size K coaxial jack, but I'm sure I'll find them somewhere.

When I got home, I noticed a strange parcel on my doorstep.
Intrigued, I checked the packaging, and to my suprise (not really), it was the PSone screen (with console)!

Pics! *56K Killers*
http://img308.imageshack.us/img308/7701/epsn00073ys.jpg
http://img329.imageshack.us/img329/8892/epsn00058cr.jpg
http://img270.imageshack.us/img270/5942/epsn00066iz.jpg <- PSone carrying case!

The header is for relocating the cartridge slot, similiar to how timmeh and Moose Jr did it. Of course I'll have first have to cut it down to size.

As you notice, I only have a few components for a DC-DC, that's because the rest I have already.

sniper_spike · Post by **sniper_spike** » Fri Dec 30, 2005 4:30 pm

The other day (yesterday) I was building the prototype of the DC-DC on a breadboard. To my amazement I realised that I had picked up the wrong inductor for the unit--I had needed 300uH! I went on building it anyway, to see if it would still work, even though it I had the wrong one. It did work, and here's a picture of it doing so.

http://img502.imageshack.us/img502/2568/dcdc2jy.jpg

Now today I've been working on the final unit (on a recycled board

), it's done now, but for some reason I'm having crazy fluctuations. The voltage has been dipping to lows of 3.2V, and even highs of 3.6V. I can't seem to spot the problem as it was working find on the breadboard.

timmeh87 · Post by **timmeh87** » Fri Dec 30, 2005 8:49 pm

the first thing id suspect is the inductor. what value is it supposed to be?

i can easily imagine a situation where the inductor works fine under no load, but when you try to suck a decent amount of current it cant keep up, or overcompensates, or whatever, dpeneding on how wrong the value is in which direction.

also, you have caps on the input and output lines right? id assume that would be part of the schematic that you are using, but just checking.

sniper_spike · Post by **sniper_spike** » Fri Dec 30, 2005 9:01 pm

Everything has been quadruple checked, I'm 99.99% sure that everything is in order.

Both the test breadboard unit and the final unit used a 9.6V 1600mAh RC battery and nothing else (so load has nothing to do with it), and like I said, it worked fine on the breadboard. So I don't see what could be causing it.

The value of the inductor was supposed to be 300uH, I took 220uH accidently.

timmeh87 · Post by **timmeh87** » Fri Dec 30, 2005 9:19 pm

yeah so apparently i skimmed over your post a little to fast. i thought the voltage was fluxuating under load.

anyways. is the flux on your board from soldering? there definitely shouldnt be. flux fried my xbox, flux destroyed kurts first snes (well actually there is no official cause of death, so many things went wrong with that). ever since then i have been afraid of flux. (but i still have to use it, of course)

i dont really know. its hard to diagnose something that i cant see