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+5V line in Powerbook G4 1.33GHz
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Fresh-Faced Recruit
Join Date: Mar 2009
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To power my mod (an internal USB hub with various things hanging off it), i need to find a +5V line inside my Powerbook G4 1.33GHz that will reliably provide 500mA. Where can I find such a thing? On the hard drive connector? Somewhere else?
Thanks for any information,
Ben
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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The hard drive power connector will have a 5V rail that can probably spare 0.5A.
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Fresh-Faced Recruit
Join Date: Mar 2009
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Thanks -- it was a bit hard to get to (had to open up the hard drive connector) but it works great, and my senile powerbook is now nicely souped up.
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Professional Poster
Join Date: Aug 2006
Location: The decaying ruins of Old New York
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You should post some details and pics of your mod, in case anyone else wants to do something similar. 
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Fresh-Faced Recruit
Join Date: Mar 2009
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Unfortunately, though everything seemed perfect, the Powerbook wouldn't sleep when plugged in to the AC power. I had a USB hub plugged into the data lines of the internal Bluetooth connector (and the power lines from the hard drive), and an IR sensor and the original Bluetooth board hanging off that. When the power was plugged in and I closed the lid, the Powerbook would sleep, then immediately wake in an endless cycle. I tried removing the hub, and plugging the IR sensor in directly, and disabling 'bluetooth devices can wake the computer from sleep' but these had no effect.
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Administrator  Join Date: Jun 2000
Location: California
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Maybe you need a different +5v line. It acts like there is a USB device change, which suggests the HD is powered down. ie - Mac goes to sleep. HD power cut off, USB hub loses power, USB hub "is unplugged" when it vanishes. Mac wakes up.
Either use an unpowered hub, or find a power source that stays up during sleep.
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Fresh-Faced Recruit
Join Date: Mar 2009
Status:
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Thanks reader50 -- your diagnosis sounds plausible and looking for another 5V line is a very interesting suggestion. But I'm not sure I know where to look for something that is kept active during sleep. There are a handful of pins marked 5V on the DC-to-DC board, but I'm afraid to touch them. I guess the sleep light is powered during sleep, but I imagine that would struggle to provide the necessary current.
An unpowered hub won't work because the internal Bluetooth USB connector only provides 3.3V, which isn't enough to power a standard USB device.
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