DisposibleHero25
Member
Can anyone post a link to some good batteries to use for a portable N64? Thanks.
Batteries
- Thread starter DisposibleHero25
- Start date
hailrazer
Frequent Poster
BlueRhapsody
Member
These batteries are pretty good. They're really cheap (20$) 3400 mah batteries. And you can be assured that they are not chinese ripoffs because they're made by panasonic xD
http://www.ebay.com/itm/2-PANASONIC-NCR ... 565ce017d4
http://www.ebay.com/itm/2-PANASONIC-NCR ... 565ce017d4
DisposibleHero25
Member
I think I need three different voltages. 12v and 3.3v for the motherboard and 7.4v for the screen. These batteries will do that?
Bush
sweet justice
Nope, you just need 7.4v and 3.3v. The batteries output 7.4v which will power your screen as well as the 12v line on the N64. It doesn't actually need 12v; whatever you supply will be stepped down to 5v (supposedly you can remove the regulator and supply 3.3v to the 12v line, but that's a totally different topic). As for the 3.3v line, head to the N64 megasticky and look at "supplying 3.3v to your N64." You simply need a small regulator from TI that will step down the 7.4v from your battery to 3.3v.
So, to recap:
Battery 7.4v --> screen
Battery 7.4v --> N64 12v line
Battery 7.4v --> TI Reg 3.3v --> N64 3.3v line
WARNING: DO NOT supply anything greater than 3.3v to the 3.3v line and DO NOT bridge the 12v and 3.3v lines at all costs. This will FRY your motherboard, guaranteed.
So, to recap:
Battery 7.4v --> screen
Battery 7.4v --> N64 12v line
Battery 7.4v --> TI Reg 3.3v --> N64 3.3v line
WARNING: DO NOT supply anything greater than 3.3v to the 3.3v line and DO NOT bridge the 12v and 3.3v lines at all costs. This will FRY your motherboard, guaranteed.
DisposibleHero25
Member
OK, so a 12 volt battery will work, but what about charging it? Ive seen a link for a charging circuit, but I am not sure if it was just for that battery or if it will work for any kind of rechargeable battery.
Bush
sweet justice
I wouldn't advise using a 12v battery. Li-ion and Li-po batteries run in multiples of 3.7v, so two cells will give us the 7.4v we need to run everything. A 12v battery is likely Ni-mh or similar and that's not convenient for a multitude of reasons. I highly suggest you use the suggested set above as it has everything you need and more for a really low price. No other combination of parts is going to be that affordable or have the same capacity. If you use a 12v battery you'll need a totally different kind of charger and you will have to use a different resistor in the ti Reg to get 3.3v.
DisposibleHero25
Member
Is it possible to extend battery life by wiring up two sets of batteries inn parallel? One set in series to get the 7.4 volts, the other as well, but both sets wired in parallel with each other?
