PS1 screen isn't working with gamecube

[Tchay]

I'm doing a little wiring commission for someone. I wired up their PS1 screen they sent me and it flashes the GC logo when turned on, and then turns off on me.

I'm giving the screen 7.6v via this switching reg:

I have composite and audio lines wired up along with several grounds.

It flashed the logo for a split second and I caught it on camera:

 

[ShockSlayer]

Never seen that regulator before in my life, what is that thing? o_O

Does the screen work right using an AC adapter?

 

[Tchay]

Yes it works right with the adapter.

So why would this switching reg not work? Especially when its been used by others and even included in a picture diagram by Harshboy?

What do you use SS?

 

[RaAaK the FoX]

wow it's little big for a portable i think but nice work

 

[hailrazer]

Those regulators are not rated for enough amperage to handle the screen and Gamecube.

 

[Ashen]

Its probably only a 1 amp reg. Not rated for enough to run even just a PSOne screen unless its LED modded. Non LED modded PSOne screen draw like 1.5 amps or something.

 

[Tchay]

Okay. So harshboys diagram, which is over 2 years old is wrong.

Think this will work?
http://www.ti.com/tool/lm5575eval

I'll keep looking

 

[hailrazer]

Okay. So harshboys diagram, which is over 2 years old is wrong.

Anybody know of a higher amp step down reg? I'll probably just look around on the TI website.

No his diagram is fine, you just probably have the wrong regulator.

 

[Tchay]

Okay. So harshboys diagram, which is over 2 years old is wrong.

Anybody know of a higher amp step down reg? I'll probably just look around on the TI website.

No his diagram is fine, you just probably have the wrong regulator.

It looks very similar to his picture, unless you think theres a different version with higher amperage.

EDIT:
http://www.ebay.com/itm/AX3022-Based-Sw ... 3a7ab0396c

1.5A should be enough, right?

EDIT AGAIN: or this
http://www.ebay.com/itm/DC-DC-Buck-Conv ... 337db24f8f

 

[hailrazer]

Okay. So harshboys diagram, which is over 2 years old is wrong.

Anybody know of a higher amp step down reg? I'll probably just look around on the TI website.

No his diagram is fine, you just probably have the wrong regulator.

It looks very similar to his picture, unless you think theres a different version with higher amperage.

EDIT:
http://www.ebay.com/itm/AX3022-Based-Sw ... 3a7ab0396c

1.5A should be enough, right?

EDIT AGAIN: or this
http://www.ebay.com/itm/DC-DC-Buck-Conv ... 337db24f8f

The pic I'm sure was just a reference pic for a adjustable voltage regulator.

The Psone screen pulls around 850 mA and the Gamecube at least 1.8A IIRC. You will need around a 2.75 A regulator.

 

[Tchay]

Okay, but wouldn't the screens amperage be the only thing that matters?

I'm only using the regulator on the screen, so isn't the gamecube's draw irrelevant?

In any case, I'll have to throw a heatsink on there. I will need to add all of this to Kasar's guide. Noobs are going to have no idea how to power their PS1 screens.

 

[Ashen]

I find its best to overcompensate when looking for regulators. If the PSOne screen by itself draws 1.5amps or so, look for a 3amp capable regulator. Sure, you can cheap out and buy something thats rated at just enough. But its comparable to revving your engine in your 4 cylinder mazda to 10,000 rpm, sure, it can do it, but for how long?

 

[Tchay]

Yeah good point.

I bought a 2A reg that can do 3A with an added heatsink. So I think that should work.