Stupid Question about wiring?

[CrimandEvil]

I don't do this stuff very much so I'm kind of new to it.
I have something that uses 2 AA batteries that I want to mod into my case but I'm not sure how to hook it up to a PSU. It looks like it can use 3.3v DC through a converter but it uses about 2.4v through the batteries.
Would I just wire it the same way you would a fan?

--EDIT--
Oh! Just in case anyone asks, it's a Gameboy Advance

 

[dunks]

1) Just curious, why are you hooking up a gameboy advance in your case.

2) Find total voltage that goes from the batteries.

3) Rig up a molex connector isolating the red wire and a black wire(5v and ground)

4) Using the voltage you have that comes from the batteries, use bit-tech's led calculator to find the resistor you need.

5) Wire the resistor in series with the molex.

6) Connect the red and black wire to corresponding positive and negative connections in the gameboy.

7) Turn it on and don't blame me if something blows .

 

[CrimandEvil]

Originally posted by dunks
1) Just curious, why are you hooking up a gameboy advance in your case.

I can't say right now but it will atleast be interesting

2) Find total voltage that goes from the batteries.

3) Rig up a molex connector isolating the red wire and a black wire(5v and ground)

4) Using the voltage you have that comes from the batteries, use bit-tech's led calculator to find the resistor you need.

5) Wire the resistor in series with the molex.

6) Connect the red and black wire to corresponding positive and negative connections in the gameboy.

7) Turn it on and don't blame me if something blows .

Thanks! I had figured out most of that but I wasn't sure.

 

[jpmkm]

I am going to have to recommend not using a resistor for voltage regulation. Resistors are okay for leds since they have a steady current draw. With something as complex as a gameboy, the current draw is going to vary, even with something like the screen going light or dark. Easiest and safest was is to just use a linear voltage regulator.

 

[CrimandEvil]

I have an AC to DC converter (offical Nintendo one) for it, could I rewire that? I figure that it's would go something like this.

 

[jpmkm]

Well you could certainly open your power supply and wire in your AC-DC adapter to the AC lines in the power supply. Are you saying that the AC-DC adapter puts out 3.3 volts? There is already a 3.3V line in ATX power supplies, but I don't know how much current is available on that line.

 

[CrimandEvil]

Originally posted by jpmkm
Well you could certainly open your power supply and wire in your AC-DC adapter to the AC lines in the power supply. Are you saying that the AC-DC adapter puts out 3.3 volts? There is already a 3.3V line in ATX power supplies, but I don't know how much current is available on that line.

Yeah thats what it looks like. The gameboy has alittle power stats on the back and has the rating for adapters:

3.3v = 350mA

I'm to sure what that last part means but it gells with what the adapter says. So do you figure that I could wire a molex connector to it and plug it into the PSU? I found the adapter over on EBgames site:
http://www.ebgames.com/ebx/product/201839.asp

I just remembered that I have a car adapter too.
http://www.ebgames.com/ebx/product/225024.asp

 

[FLECOM]

you could wire the car adapter easily... the tip of the car adapter to one of your yellow wires on the molex connector and the oustide of the car adapter to a black wire

 

[CrimandEvil]

Thanks!
They look kind of bulky but I think I can remount them into a smaller case.

 

[Az2]

2 AAs would supply 3 volts. I THINK 3.3 should be ok.

 

[CrimandEvil]

Originally posted by Az2
2 AAs would supply 3 volts. I THINK 3.3 should be ok.

Thanks, I knew that but I'm going to go with the car adapter approach because it's simplier right now. I think I'm going to ask my friend if he can help me wire it together (he owns a game store and does mod chips from time to time).