My portable NES - uh... help, please?

im_an_alien · Post by **im_an_alien** » Sat Jun 10, 2006 10:35 pm

hmm... how do I get an NES to run off batteries? I think I read something about putting +5v on a certain blob of solder or something... maybe I should have found out before I ripped it apart...

Klefmung · Post by **Klefmung** » Sat Jun 10, 2006 10:55 pm

It is +5v. >_> You know those 5 holes that went to the rf box? The +5v input is the middle one.

im_an_alien · Post by **im_an_alien** » Sat Jun 10, 2006 11:31 pm

So I just put +5v on the middle... erm, what aree those spikey things? solder?

...by the big capaciter?

im_an_alien · Post by **im_an_alien** » Sun Jun 11, 2006 11:10 am

Please can someone answer my question? I need to find out how to do this exactly before I start on other things

ps a picture would help a lot

also would 4.5v be good?

Post by **Skyone** » Sun Jun 11, 2006 1:25 pm

I don't think 4.5v would be good.

Solder 5v to the output of the component labeled 7805 or so (May be LM7805 or variant.)

The 7805 may be hiding behind a heatsink.

im_an_alien · Post by **im_an_alien** » Sun Jun 11, 2006 2:12 pm

Thanks! So the one labeled 7805 (or on mine 17805) by the big capacitor? put 5v on the pin on the right? Then what do I attach to the negative end of thee battery?

Klefmung · Post by **Klefmung** » Sun Jun 11, 2006 2:25 pm

The big metal strips on the sides of the mobo. Put it there.

im_an_alien · Post by **im_an_alien** » Sun Jun 11, 2006 7:45 pm

I put 6v (how the heck am I supposed to get 5v without special batteries???) on the right pin, then put the negative end to the metal strip on the side of the mobo, and it didn't work... did I fry it?

edit: the best way to figure out if something is fried is... to plug it in the way it's supposed to and try turning it on! So I did that and... *long suspenceful pause* ...it still worked

so what did I do wrong?

Post by **CronoTriggerfan** » Sun Jun 11, 2006 7:59 pm

Perhaps you put it in backwards. Although you may have put it on the right (as in directional) pin, your 7805 may have been reversed, thus making the pin you soldered to output. So try soldering to the opposite pin. Also, was your 7805 still grounded?

CTFan

im_an_alien · Post by **im_an_alien** » Sun Jun 11, 2006 8:29 pm

No idea

I'm seriously the biggest n00b ever at electrical curcuits. I'll try putting it on the other way, though.

Post by **CronoTriggerfan** » Sun Jun 11, 2006 8:33 pm

CronoTriggerfan wrote:Also, was your 7805 still grounded?

CTFan

In layman's terms, was the middle pin of the 7805 still soldered to the board?

CTFan

im_an_alien · Post by **im_an_alien** » Sun Jun 11, 2006 8:36 pm

I put it the other way and it still didn't work

Klefmung · Post by **Klefmung** » Mon Jun 12, 2006 10:04 am

Were you putting 6v into a 7805? for a 7805 to work, you have to give it 7 or more volts.

im_an_alien · Post by **im_an_alien** » Mon Jun 12, 2006 10:10 am

ok. I'll just have to use 5 batteries

And yes, it's still grounded

edit: still won't work

Klefmung · Post by **Klefmung** » Mon Jun 12, 2006 10:17 am

did you run the ground through the middle pin on the 7805? Just put more than 7v into the farthest pin left, put ground in the middle, and then the rightmost will output +5v and put that in the middle hole of the five. And put the ground on the metal strip.