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Need OCN pro's Help!! Circuit board question- - Page 2

post #11 of 16
Quote:
Originally Posted by bob808 View Post
is this true? both pc and ps3 have +5v power leads coming from their usb ports- if you connect 2 positive wires, you get a spark right?
no, if you touch the 12v wires from two PSU's together nothing will happen. The only thing i am wondering about is feeding power into a system that is off. But if both are on it wouldn't make a difference.

PICTURE TIME.

see the picture. You can hook batteries up like that, as well as PSU's, It just sort of synchronizes the power feeds together.
post #12 of 16
Quote:
Originally Posted by thrasherht View Post
actually having the PC or the PS3 on together wouldn't do much, because it would be 5v+ to 5v+, it would be like combinding two power sources into one. They would work together, not against eachother.

You would only need to switch the USB data wires in order to make it work.
You need the power connections for the return current paths from the data lines. There are diodes in the 5V (or ground) lines to stop the reverse flow on the top side of the board (the back components with a white band on one end).

If you are set on modding it, I'll draw you up a schematic when I get the chance. Wouldn't want you to burn something.
    
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post #13 of 16
Quote:
Originally Posted by just_nuke_em View Post
You need the power connections for the return current paths from the data lines. There are diodes in the 5V (or ground) lines to stop the reverse flow on the top side of the board (the back components with a white band on one end).

If you are set on modding it, I'll draw you up a schematic when I get the chance. Wouldn't want you to burn something.
Oh, yes, i forgot about diodes.
post #14 of 16
if the 2 systems have different ground references it could cause problems too

you could use 2x 5v dpdt relays to switch it for you, and use a single push on/off switch
http://www.mouser.com/ProductDetail/...WgnqNM2Qg0g%3d
post #15 of 16
Thread Starter 
Here's what I ended up with. I bridged the 5v and wired up the data wires (+ and -) to the toggle switch. I just hooked it up and am about to test it.
wish me luck

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MKG-Cosmos II
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post #16 of 16
Thread Starter 
well after some testing, it works- kind of. from the machine powered off at the power strip, it works fine. I was able to switch from the ps3 to the pc, and the wheel worked on both. but when I tried toswitch back to the ps3, the wheel was acting like the up button was getting pressed the whole time and I could not use the select button either. If I killed power to the whole machine, it would work again. I figured that having the 5v going to the wheel the whole time would not let it reset when it does its calibration thing when you first power it on (any system) so I switched the wire bridge from the +5v to the data- and took the wires that were soldered to the data- that go to the switch, and soldered them to the +5v.

Now when I flip the switch to the middle position (which happens every time you switch sources) it kills the data+ and the +5v connection.

It now works like a champ!
I ended up doing it just like in this pic bridging the white dots and wiring the red and green dots to the switch. Yea!

thanks for the comments guys even though I seemed to have guessed right the first time
Rep has been handed out

Edited by bob808 - 1/31/11 at 10:38pm
MKG-Cosmos II
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CPUMotherboardGraphicsRAM
i7 920 DO oc'd to 4.25Ghz EVGA 3-way Sli Classified 2x480 SLI 3x2g Corsair CMG6GX3M3A2000C7 
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80g Intel ssd, 2x300g raptors (0), 2x1 TB RE3 (0 Pioneer Blu-Ray burner, 22x dvd burner custom loop Windows 7 64bit 
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LG W3000H, dell ultra-sharp 24" Ducky 'OCN' with brown hx1000 Cosmos II 
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mionix naos 5000 steelseries SX 
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MKG-Cosmos II
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 DO oc'd to 4.25Ghz EVGA 3-way Sli Classified 2x480 SLI 3x2g Corsair CMG6GX3M3A2000C7 
Hard DriveOptical DriveCoolingOS
80g Intel ssd, 2x300g raptors (0), 2x1 TB RE3 (0 Pioneer Blu-Ray burner, 22x dvd burner custom loop Windows 7 64bit 
MonitorKeyboardPowerCase
LG W3000H, dell ultra-sharp 24" Ducky 'OCN' with brown hx1000 Cosmos II 
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mionix naos 5000 steelseries SX 
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