Apologies if this has been asked before but I couldn't find anything that does exactly what I'm wanting.

I'm trying to power a Nintendo64 and a 12V display with batteries.

I need to either make or buy a battery powered supply that can output the following voltages:

2 x 3.3V @ 2.7A (The Nintendo has two 3.3V inputs. Can these just be run off the same 3.3V supply?)
1 x 12V @ 0.8A
1 x 12V @ 0.5A (Can I also run the screen off the same 12V supply for the Nintendo?)

I'm planning on using 4 Samsung 25R 18650 2500mAh batteries (Just what I have lying around if this isn't ideal I could change to another battery)

Hopefully this is enough information. Thanks in advance!

 

Apologies if this has been asked before but I couldn't find anything that does exactly what I'm wanting.

I'm trying to power a Nintendo64 and a 12V display with batteries.

I need to either make or buy a battery powered supply that can output the following voltages:

2 x 3.3V @ 2.7A (The Nintendo has two 3.3V inputs. Can these just be run off the same 3.3V supply?)
1 x 12V @ 0.8A
1 x 12V @ 0.5A (Can I also run the screen off the same 12V supply for the Nintendo?)

I'm planning on using 4 Samsung 25R 18650 2500mAh batteries (Just what I have lying around if this isn't ideal I could change to another battery)

Hopefully this is enough information. Thanks in advance!

I do not know if the nintendo needs different power supplies on the different inputs.

As for the rest: you need a separate power supply circuit for every voltage. The circuit must contain a voltage regulator and a current regulator(if needed). its doable, but you need to find a circuit that outputs the voltages you need.

Also 4batteries will give you 14.8VDC(more in reality) but you will still get 1A of current, at best 2A.

 

I do not know if the nintendo needs different power supplies on the different inputs.

As for the rest: you need a separate power supply circuit for every voltage. The circuit must contain a voltage regulator and a current regulator(if needed). its doable, but you need to find a circuit that outputs the voltages you need.

Also 4batteries will give you 14.8VDC(more in reality) but you will still get 1A of current, at best 2A.

Thanks for the reply! Good to know. The specs on the 25R's that I was planning to use say that they have a max discharge of 20A (obviously wouldn't want to be pulling that current for too long) should be enough to do what I want. I think?

 

Thanks for the reply! Good to know. The specs on the 25R's that I was planning to use say that they have a max discharge of 20A (obviously wouldn't want to be pulling that current for too long) should be enough to do what I want. I think?

These batteries "18650 2500mAh" can not have a discharge current of 20A. You must be mistake somewhere. At theoretical level, these batteries can give 2.5A for 1 hour at best, at practical level you will get 1-1.5A for about an hour and a half.

 

These batteries "18650 2500mAh" can not have a discharge current of 20A. You must be mistake somewhere. At theoretical level, these batteries can give 2.5A for 1 hour at best, at practical level you will get 1-1.5A for about an hour and a half.

Oh yeah, my bad. If I was using 20A I'd be lucky to get 5min. Might be an idea to look for a more appropriate battery. Thank you so much for your help!

 

Oh yeah, my bad. If I was using 20A I'd be lucky to get 5min. Might be an idea to look for a more appropriate battery. Thank you so much for your help!

No problem. One option would be a car battery (normal voltage 11VDC to 14.4VDC, 55A/h, 50 USD). Of course you will need the charger also and to make sure the battery does not fall under 11V with some circuit or at least to see the time for which it falls to 11VDC.