Gamecube Power Questions

Post by **Skyone** » Thu Jul 03, 2008 10:55 pm

A step-up is much better, trust me; you don't want the inefficiency of two separate battery sources. As for using the PSOne screen 7805, it would most likely draw too much power and create excess heat, seeing as it's an SMD IC.

Anyway, more pics soon!

@dragonball: I don't think transformers/bleeding resistors would be too efficient honestly. Tie the batteries in parallel, yeah, and feed them into a custom power supply with 4 regulators (I'll post more pics as said before).

Post by **Skyone** » Fri Jul 04, 2008 3:16 am

Sorry for the double post.

1.9v - LM1585A Schematic

3.3v - LM1086 Schematic

5v - LM7805 Schematic

12v to come.

bacteria · Post by **bacteria** » Fri Jul 04, 2008 7:46 am

Fantastic stuff - looking forward to the 12v!

Bigmac · Post by **Bigmac** » Fri Jul 04, 2008 8:14 am

Thanks again, Skyone! Keep it up. I love the quality of your diagrams.

dragonball345 · Post by **dragonball345** » Fri Jul 04, 2008 3:03 pm

This is awesome actually thx a bunch will make it much easier on me just need to break out my breadboard now. Would you suggest maplins or TI for all this stuff?

bacteria · Post by **bacteria** » Fri Jul 04, 2008 3:37 pm

I just tried to find the components on Maplin's website, couldn't find them. That is the problem in the UK, we seem very restricted on where to buy such things! If you find the items on Maplins web site, please post links!!

dragonball345 · Post by **dragonball345** » Fri Jul 04, 2008 4:09 pm

whered you get the parts skyone?

Post by **Skyone** » Sun Jul 06, 2008 3:34 pm

Try Digikey (digikey.com).

12v diagram to come soon!

techknott · Post by **techknott** » Wed Jul 09, 2008 8:49 am

bacteria wrote:I just tried to find the components on Maplin's website, couldn't find them. That is the problem in the UK, we seem very restricted on where to buy such things! If you find the items on Maplins web site, please post links!!

Just use LM317's(adjustable) from maplin and an MC34063 for the step up.

vskid · Post by **vskid** » Wed Jul 09, 2008 10:34 am

techknott wrote:use LM317's(adjustable)

Those aren't very efficient, they just turn the extra voltage into heat. The bigger the difference between input and output voltage, the more heat produced, depending on the amps drawn, too.

You could use these regulators (or their fixed voltage versions). Their max output amperage is only 1A, though, so the 1.9v line will need 2 or 3 of them (they can be put in parallel). You could probably build a similar setup (or just use the original regulator board) for less and in a smaller area, but they'd be good if you don't want to mess around with other options.

Does anyone know how efficient the original board is? Is it just the 12v input that people want to get around?

bacteria · Post by **bacteria** » Fri Jul 11, 2008 4:57 am

techknott wrote:
bacteria wrote:I just tried to find the components on Maplin's website, couldn't find them. That is the problem in the UK, we seem very restricted on where to buy such things! If you find the items on Maplins web site, please post links!!
Just use LM317's(adjustable) from maplin and an MC34063 for the step up.

Can't find MC34063 on maplin.co.uk - "product not found".

If you feed 7.4v into a GameCube power board (which outputs different voltages into the system), could it yield the 1.9v, 3.3v and 5v and just leave us needing a step-up regulator for the 12v line? When I start the GC project I will experiment, just wondered if anyone knew the answer.

dragonball345 · Post by **dragonball345** » Fri Jul 11, 2008 2:35 pm

Bacteria If I get my batterias or one of those voltages machines which you can adjust I'll check that I would say it should give you the proper amount.

dragonball345 · Post by **dragonball345** » Mon Jul 28, 2008 3:35 pm

Im planning on borrowing a power supply with adjustable inputs fom where i work. Itll let me adjust it to anything i want voltage wise at least not sure about anything else i should be able to get it for a while if not tommorow i will be able to get it in a few eeks tell me if you want me to test anything. I also saw a proffesional vac forming machine whee i work since its between two schools i could use it but it didnt seem rdy to accept like a wooden block for mold not sure though will check it out.

techknott · Post by **techknott** » Tue Jul 29, 2008 10:20 am

The lowest you can go to on the GC psu is 10v. At 10v it will output all voltages except the 12v line, by which it will put out whatever you put in. The 12v line is not regulated in any way, it connects straight to the main psu input.

btw, you can get mc34063's from just about any 12v car cigarette lighter plug. They can be used as step up, down or inverting dc-dc converters, just grab the datasheet.

Here is a schematic of mine ive made, please dont flame. My circuit drawings leave a lot to be desired.

btw, this is a dc-dc converter with 12v output. It will take an input as low as 3v.

dragonball345 · Post by **dragonball345** » Sat Aug 02, 2008 12:35 pm

I spent a couple of hours wiring my powerboard to my motherboard today along with some testing and I couldnt get it too power on i fed in voltages all the way up to 12.1 volts. I connected every wire individually too so anybody know what could be wrong I may just not of been able to tell its on since i dont have everything to indicate to me. but not sure. But when i used a i cant beleieve i forget the name but the thing that measures amps/volts and stuff i couodnt get a reading anywhere.