N64 Powerpack

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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andrew.wa
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N64 Powerpack

Post by andrew.wa »

First of all hats off to the Ben and the modding community for doing such creative and inspiring work!
I've had an idea for sometime, but never really thought it was possible until I came across this site and saw all the cool projects people have done. :)

Well here is my motive to start this project. For me, making the N64 portable doesn't mean it needs to be a handheld console, or even lightweight, or space saving. All I really want is a battery pack. I figure that I already have a portable DVD player with a screen and an AV in jack, that has its own battery to power the screen- So that's one major obstacle side stepped. Also I wouldn't mind throwing the whole console in a backpack, so long as I had a solution to keep it from overheating, which shouldn't be to hard to devise. Unlike a lot of people I've seen here, I actually like the original controllers just fine, and I do use all the buttons, so I'm totally cool with using the original controller. I also don't want to spend that much, I think if I don't fry anything this could be under a hundred dollars.

So here's what needs to be done:

1. Devise a rechargeable battery pack that can plug directly into the back of the console. (if this is possible; I don't see why I should need to take the console a part at all for this project).
The obstacles I have with this are:
What battery to chose. I'd like it to have about the same life as my DVD battery does (powering the screen), which is probably 3-4 hours.
I don't know how to split the power from the battery into the 2 different voltages required. I assume a few resistors and diodes is all that's needed?
Design a Casing to put the battery in that looks neat and stays cool.

2. Convert the Nintendo AV out to be compatible with my DVD AV in. May require disassembling the DVD... May not work :?

3. Finding a sturdy, neat looking, space saving way to mount the console inside the backpack, with adequate cooling, that also allows for easy removal, and will allow me to throw other stuff in the backpack without problems.

Other Ideas:
-Rerout the power switch to be accessible from outside the backpack (this of course would require cracking her open). -Position the console so that the cartridge can be changed from outside the backpack... or better yet by unzipping the front pouch ^^. Meaning not rerouting/wiring the cartridge slot, just positioning of the console to keep things simple. I've seen how many wires and solder points that are involved in repositioning the cartridge slot :o
-Putting an LED on the controller to signal battery life (like on a Gameboy). --don't know how to do it, but just thinking about it, use something to monitor the current level, maybe disassemble a multimeter, and just have an LED come on when the current drops below a certain level?
-Integrate for LOB64
XCVG
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Re: N64 Powerpack

Post by XCVG »

Should be simple. Just get an (broken) N64 power supply, shove a battery and regulator in it, and off you go.
jjhammerstein
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Re: N64 Powerpack

Post by jjhammerstein »

You could totally fit a generous amount of batteries in the giant power box that plugs in the back. Cut the wires, patch the hole, and you're looking good!
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andrew.wa
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Re: N64 Powerpack

Post by andrew.wa »

I got to thinking. Why stop with a power supply? Wouldn't it be totally amazing to have a combined DVD N64?
Anyway I bought some tools yesterday and I've also tested the compatibility of the N64 with the DVD player. It works beautifully :]
I'm clearing out a section of my room so I can have a proper work bench too :D

Here's the DVD Player:
Its a Toshiba SD-KP19SN. Its actually a really nice one, feature packed, even though its several years old.
It has AV In and out. Optical audio out (DTS). Dual headphone jacks. An AC and DC (Car) charger. It also supports DIVX and Dolby Digital. It also can read several types of memory cards. And A Fully Featured Remote. What a great base!
Image
ImageImageImageImage

I had some fun setting it up too. The AV out is male and so is the N64. So I went looking for cables to branch a connection and split open an old printer cable. Bad source. There were about 30 teeny unstrippable wires. So plan B I wrapped foil around the contacts of the two male ends and taped strips of foil between them. Signal was sensitive to vibration but worked fine for testing ;).

ImageImage

So I'm still not sure how designing a battery will work for the N64. I asked on yahoo answers and a retired engineer gave me an answer, but I don't think he fully understood me, because it doesn't look right to me. Honestly I don't understand how the N64 takes power. My original Idea was to use 8 D cell batteries and plug them directly into the 6 slots on the back of the N64. I just told him I had a single power supply made of eight D Cell (1.5V * 8 = 12V) batteries powering 3 circuits that required different voltages/amperage. I guessed this based on looking at the diagram on the N64 power supply that indicates the 6 wires are a 12v 0.8A, a 3.3V 2.7A, another 3.3V 2.7A, and 3 (-) (grounds?).
Image

I made this diagram with a free circuit designer with some advice he gave and he said he thought it would work:
Image

But after seeing how many people have been successful with Rechargeables I'm leaning toward that method. I just don't know how to do it.
Help Appreciated :)
XCVG
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Re: N64 Powerpack

Post by XCVG »

Just... no. Don't do that. What you need to get is two lithium-polymer cells and a protection circuit. You can find these in portable DVD player batteries, camcorder batteries, or order them from Batteryspace or All-Battery.

Image

Notice that the output is only 7.4V? That's fine, the N64 only needs about 6V on that line. The 3.3V is just one line actually, the two connectors are for extra power handling. The charge jack goes to a "smart charger". The thing with all the connections is the protection circuit. And the volage regulator regulates the voltage. Most people swear by the TI PTH08080, but you can actually use anything that will take 7.4V, output 3.3V, and can handle up to about 2 amps. The TI card is probably the best though. You can get a free sample and there's a zillion guides on wiring it up.

Does your DVD player already have a battery? If it does you can probably run both devices off the same battery. Here's an idea- build an N64+DVD player laptop! That would be epically sweet.
andrew.wa
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Re: N64 Powerpack

Post by andrew.wa »

Yeah I know that looked like a terrible idea hehe. It was literally a "first thought."

Thanks so much for the info. The N64 DVD laptop.... great Idea I was actually thinking about this because my dad has 2 dead laptops sitting around I could use as the shell ^^. The DVD does have a battery, I guess I cropped it out of the pictures. It says Li-ION DC7.4V 4000mAh. My only concern with using the DVD battery for the whole system is battery life. From using it for DVDs it has a very reasonably long battery life though. About 4 hours continuous play, with ~~ 3.5 hours charge. So with added strain of a N64... ?? how many mAh would one expect pulled by an N64 playing a stressful game ie. Majoras mask (ex-pac)?

Do you know of others who have used DVD players batteries for their consoles?
Why do you suggest that particular setup exactly? I'm kind of reluctant to use LIPOs because my friend uses them on his RC car and I know they can be kind of dangerous :p.

And to confirm the TI PTH08080 is a "protection circuit" and it comes with the voltage regulator from that picture? Where would I get a voltage regulator otherwise?
Can I get any similar useful components out of the N64 Power cord?

Thanks again. Best regards,
Andrew
XCVG
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Re: N64 Powerpack

Post by XCVG »

You could use the DVD player battery, no idea on battery life though. Someone else can tell you. The output would go to the voltage regulator and N64. And LiPo batteries are reasonably safe as long as you are careful.

The PTH08080 is the voltage regulator. The protection circuit is separate, you get that from the same place you get the batteries from.

I've never opened the power adaptor, so I wouldn't know if there was anything good in there.
schmellyfart
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Re: N64 Powerpack

Post by schmellyfart »

You might as well use Nimh if you are going to put the batteries in the n64's power brick. They are cheaper and theres no point in saving space in there ;). Although you will still need the PTH regulator already mentioned.

Someone else one here has done this, I just dont remember who.
andrew.wa
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Re: N64 Powerpack

Post by andrew.wa »

Thanks again. There are 6 different PTH08080 at the TI site, 3 of them have a free sample option. Which one do I need? http://focus.ti.com/docs/prod/folders/p ... 8080w.html" onclick="window.open(this.href);return false;

And any idea where to get a PCB?

Much obliged!
jjhammerstein
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Re: N64 Powerpack

Post by jjhammerstein »

Any of them are fine, the only difference is the length of the pins.
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schmellyfart
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Re: N64 Powerpack

Post by schmellyfart »

What PCB are you looking for? A protection circuit for li-ions
XCVG
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Re: N64 Powerpack

Post by XCVG »

andrew.wa wrote:Thanks again. There are 6 different PTH08080 at the TI site, 3 of them have a free sample option. Which one do I need? http://focus.ti.com/docs/prod/folders/p ... 8080w.html" onclick="window.open(this.href);return false;
Get them all, and get all the PTH08000 ones you can too. Then ship me some :P

In all seriousness, get as many as you can. You can only get one of each.
andrew.wa
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Re: N64 Powerpack

Post by andrew.wa »

Well for now lets say I will use the Li-ion battery that's part of my DVD.
Its a Toshiba SD-PBP18 7.4V 4000mAh. Shouldn't it have a protection circuit built in though?? OR would the protection circuit be part of the charger or the Player unit? I wouldn't think so.
I found this
http://www.all-battery.com/pcbfor74vli- ... 32004.aspx" onclick="window.open(this.href);return false;
would that work?
XCVG
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Re: N64 Powerpack

Post by XCVG »

andrew.wa wrote:Well for now lets say I will use the Li-ion battery that's part of my DVD.
Its a Toshiba SD-PBP18 7.4V 4000mAh. Shouldn't it have a protection circuit built in though?? OR would the protection circuit be part of the charger or the Player unit? I wouldn't think so.
I found this
http://www.all-battery.com/pcbfor74vli- ... 32004.aspx" onclick="window.open(this.href);return false;
would that work?
The protection circuit is almost certainly built in.
andrew.wa
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Re: N64 Powerpack

Post by andrew.wa »

I ordered the 3 free voltage regulators. I ordered 3.8 and 4.5 mm gamebits from an ebay store on the 18th but I've yet to get a tracking number :\
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