3.3v idea!

imapaintballa · Post by **imapaintballa** » Sun Sep 18, 2005 6:24 am

well i was thinking furiously and came up with an idea. you get 6 rechargable aa's (walmart has 1850 mAH for $5 for package of 4). put every two of them in their own 2 battery-packs. then you wire the 3 battery packs in parallel to get around 5a-6a power capacity. would this be okay for the 3.3v, since the output voltage of the battery packs is 3.6v? i have the nus-001 case, but is that the one with the power thing on the 3.3v wher i can have anything up to 5v?

daguuy · Post by **daguuy** » Sun Sep 18, 2005 7:50 am

you would need 3 in series and then put 2 of those in parrallel. all the gray cases i've seen say NUS-001 but the mobos say something different. you'll have to see what it says behind the cart slot

new york cheech · Post by **new york cheech** » Mon Sep 19, 2005 6:03 pm

3.6v should be fine...its a very small amount over....i dont even have the nus-001 and i accidently put like 6v in it by accident and it was ok....but i might of just been lucky.....

G-force · Post by **G-force** » Mon Sep 19, 2005 10:00 pm

I put 4V into it for over half an hour and it still works fine.

usbcd36 · Post by **usbcd36** » Tue Sep 20, 2005 1:56 pm

As soon as I get a few hours, I'll wire up my DC-DC convertor and blow you all away!

Well, maybe not, but I like my idea because it doesn't leave you stuck with 2 banks of batteries.

imapaintballa · Post by **imapaintballa** » Sun Sep 25, 2005 1:24 pm

ive been all over digikey and i havent found one 3.3 dc converter rated at 1.5 amp output. could someone point me in the right direction?

G-force · Post by **G-force** » Sun Sep 25, 2005 1:41 pm

Digi-Key part # LM1086IT-3.3-ND

Found it last night. I hope to order some later today.

imapaintballa · Post by **imapaintballa** » Sun Sep 25, 2005 1:43 pm

but isnt that a regulator? i want efficiency, so i need a dc/dc converter.

G-force · Post by **G-force** » Sun Sep 25, 2005 2:03 pm

Yeah its a regulator. I didn't realize you meant a DC to DC converter. usbcd36 found one, and he is supposed to be finishing the the testing soon. If I remember it cost about $30.

imapaintballa · Post by **imapaintballa** » Sun Sep 25, 2005 3:25 pm

dang! i might just say screw it and ill get a regulator. i just wish dc/dc converters were cheaper.

Post by **marshallh** » Sun Sep 25, 2005 4:58 pm

If you have a Circuit City near you, you can grab the Sony dcc-e345 car power converter. It outputs about 3.3 volts, amazingly.

imapaintballa · Post by **imapaintballa** » Sun Sep 25, 2005 5:22 pm

sweet, do you know the amp rating?

superdeformed · Post by **superdeformed** » Sun Sep 25, 2005 5:56 pm

It's rated for 1amp and Sony's specs say it outputs 3.0v, not 3.3v. If you measured 3.3v on it then its probably because you didn't have a load on it. As it doesn't appear to be a regulated output, it's only going to put out the specified voltage if the load is close to the rating (1 amp). It's also $20...

imapaintballa · Post by **imapaintballa** » Sun Sep 25, 2005 7:57 pm

okay so no thanks i guess. im now down to using 3 rechargable 2100mA aa's as a power source.

G-force · Post by **G-force** » Sun Sep 25, 2005 8:03 pm

It dosn work very well. With a 220 uf capacitor on the line it only lasts 30 minutes before resetting.