N64P Power using 8 AA's and resistors.

samuelm · Post by **samuelm** » Mon Mar 07, 2005 8:28 am

Want to power my N64P / PS1 screen with 12v (8AA's) and resistors. Several questions.

1) Is this a stupid idea because of amperage lost as heat?

2) If it's not how would I wire it... i.e. which resistors?

3) Has anyone else done it this way?

Post by **Sparkfist** » Mon Mar 07, 2005 8:36 am

First you dont need 12v you can use only 7.2v. You dont want to use alkaline batteries either they have too low a capacity for something of such a high draw.

Now if you want a simple setup you'll want one or two 7805 power regulators and connect the output to a 3Ohm resistor (setup to output 3volts). The other option is look in to buying a 3.3v DC-DC converter, if your interested look at digikey.com.

samuelm · Post by **samuelm** » Mon Mar 07, 2005 8:48 am

What type of battery would you suggest?

Post by **Sparkfist** » Mon Mar 07, 2005 9:03 am

Ni-MH with atleast 2000mA capacity.

HK-47 · Post by **HK-47** » Mon Mar 07, 2005 2:32 pm

Get some 3000mah rc car batteries...
They're made of sub-c's and kick butt for the size and price.
They look like this: (The things on the right...)

samuelm · Post by **samuelm** » Wed Mar 09, 2005 9:40 am

could you explain further how to wire the 7805's and which resistors to use? A picture of one someone has already done would be tremendously helpfull.

Also, are there any 7805's in the n64 power supply I can steal?

Post by **Sparkfist** » Wed Mar 09, 2005 11:02 am

Yeah if you open the PSU it has two 7805 next to each other, and by the output plug you'll see two resistors (mine were yellow, Triton said his were brown). Just wire these together (in parallel) and you;ll have what you need for the 3.3v input. As for the 12v input it goes straight to a 7805 on the board so 7.2v is enough.

Guest · Post by **Guest** » Wed Mar 09, 2005 11:58 am

there are a lot of resistors on the board... do you know the color code or the exact location on the board? Thanks in advance

Post by **Sparkfist** » Wed Mar 09, 2005 1:30 pm

Both Triton and I have found they dont have the classic color bands on it. And as I said before, they should be next to each other by the plug that goes into the N64.

As for setting it up. Not complecated at all. Just solder the resistor to the output pin on the regulator and then to one of the two pinouts on the board (they're labled 3.3).