Soldering onto the usb ports

**Player1** · 07-11-2011,11:51 PM

May be we are talking about different things.

Just to be sure, please post some schematichs, possibly that could help.

Ill try to do one to explain what you need, be patient.

**wigwrm** · 07-11-2011,11:57 PM

You would need a double throw double pole switch (dpdt) in order to switch the data signals from pc to ps2 using the connection between the hdd and the ps2's usb port. In one configuration the diff pair will be sent to your usb port in your ps2, in the other configuration it will be sent to your pc.

So to recap, one mode lets you access your hdd via pc as to load games etc...
the other mode disconnects you from your pc and allows your ps2 to read the hdd.
You'll need one usb cable (with same head size to connect between your ps2 and computer and a dpdt switch.
You'll connect the dpdt between your ps2's usb data pins (+ and -) and the data wires from your usb cable.

If you need a diagram I can provide one.
http://img204.imageshack.us/img204/2459/unledw.gif

**Player1** · 07-12-2011,12:11 AM

THIS IS WHAT YOU NEED TO DO IT :

http://s2.postimage.org/ofd2fe7qs/usb_hdd_coneccion.jpg
hosting images
The pin you need to lift up is just one of 2 in betwen pwr and gnd, JUST one specifically, i dont remember it now. Just try.

That cable needs to be soldered to USB PORT PIN, NOT TO THE PS2 MOTHERBOARD.

wigwrm: I think you got it now, but this is the easiest way. Anyway ill be happy to see your diagram. Ive done almost a hundred of this devices before.

edit 2: NICE WORK wigwrm, that is what it needs to work.
But only ONE cable needs to be isolated from the motherboard while connecting to pc.

**21q** · 07-12-2011,12:35 AM

Alright well this project is a bit more complicated now. So lets recap.

I'll need to use a switch to allow for data between pc and then ps2. From the diagram that Player1 one has shown i need a simple switch on the green wire. [This assumes that the drawing shows the motherboard's topside]

Also, the pins cannot be soldered onto the motherboard itself. But rather I'll need to solder it onto the pins themselves. Which also means I have to remove part of the shielding around the usb pins on the back.
When you get home could you provide me a picture of your setup?

A slightly different path would be Wigwrm's dpdt switch. Which I don't really understand this kind of switch. Doesn't it just connect the wires in the same fashion in the end?

**Player1** · 07-12-2011,12:45 AM

The only cable you need to solder to the lifted up pin is the "green"(or the white) all the rest you have now is good.

Solder just two more cables to outside of the case: one from the pin , one from the mo-bo... just join them and you are in PS2 MODE, separate them and you are in PC MODE.

Another day you can add a switch...

Understood??

I think is easy, you are at just one step to finish

**21q** · 07-12-2011,01:08 AM

It still doesn't work. I tried the white and then the green.

Is it because I soldered it onto the motherboard and not the pins? or because it's not formatted as fat32?

**wigwrm** · 07-12-2011,09:02 PM

First let me say, do not follow the advice of either one of us in this thread. What you are trying to accomplish doesn't make much sense and there is no reliable way to do it. The diff pair (data's) of the usb is always made as a twisted pair (to help distribute noise equally amongst the signals. The diff pair receiver subtracts that noise from the lines as well as combines the two different signals (data + and -) together. USB is a high speed data link and like all high speed transmission, is extremely susceptible to noise. Even if you were able to wire this in some hokey fashion, you couldn't reliably R/W from your HDD without expecting data corruptions/failures. Any switch you would try to use would cause an impedance mismatch in the signals and would probably cause data to be incorrectly transmitted. Also your Y cable is meant to plug in the extra connection (off of the y) into another usb port on your PC to provide more current draw for devices that need more than 500mA of current to run.

In short. Why not use a FTP application to send files to your HDD thus allowing you to keep it internal to your machine. You would interface with it through the ethernet port of your ps2.

**21q** · 07-12-2011,10:49 PM

What you say makes sense. I really don't understand why one wire would have to be disconnected. Welp I think I will try removing the metal shielding around the top part of the usb and solder directly to the pins. It may be that the chips on the top side of the mobo are interfering with data flow.

I cut ive made all the adjustments to the casing. This soldering is the last bit I need to do.
http://i84.photobucket.com/albums/k6...-22-51_955.jpg

**GillBert** · 07-12-2011,10:52 PM

LOL... what odd thread...

It won't never work on this way at all, because you didn't provide power supply for the HDD.

The 5Volts from PS2 USB only provides power supply for the SATA-USB Adapter. The HDD does need +5volts and +12volts to operate. Next to the HDD data connector, there is another one to connect a cable like this one where yellow is 12V, red is 5V and black are grounded. And these voltages must come from a separate power supply. And I haven't seen any power supply in this picture:

Originally Posted by 21q

The other side goes to a sata adapter. http://i84.photobucket.com/albums/k6...-24-10_198.jpg

[ ]'s.

**21q** · 07-12-2011,11:12 PM

I've read a lot of post of people who got it working just by the usb port with a 2.5" drive though? Is there something they are doing different? Is it because it's usb 1.1 that it doesnt provide enough voltage?

Couldn't I then just wire the power wires to both usb ports and the power connecter of the ps2? 5v+5v+8.5v= 18.5v
being 1.5v over power shouldn't be much of an issue.

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