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Thread: Powering XMDirect & powered USB seperately ?s

  1. #1
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    Powering XMDirect & powered USB seperately ?s

    Woo Hoo for me. I got my carPC up and running and have had a great time researching and learning all about this stuff. I have a power supply issue though...

    My M2 doesn't provide enough power to power my XMDirect (12v?, ?A) or my 5 port powered USB hub (5v, 2.5A). I am looking for a simple, cost effective way to power these. Any ideas?

    I have been looking at different options, but not quite sure the best way to go and hopefully can get some answers here. I would like it to turn on/off with the vehicle like my M2 does, but am not sure how to go about doing that without a motherboard attached. Any ideas, options, potential problems, etc. will be greatly appreciated.

    I have also had a hard time finding the power needs for XMDirect (I believe it is 12V, but don't know how many amps or watts it takes.)

  2. #2
    The Last Good Gremlin GizmoQ's Avatar
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    The XM Direct is designed for auto installs and doesn't have to be powered via your M2. Just tap into any 12V and ACC, but ground it well

    As for the USB, I've been collecting cigarette lighter adapters that have a USB port. I just dismantle one of these, repackage it, tie it into a 12V or ACC line and attach whatever plug is required for the hub - been working for 8 months so far.
    HARDWARE: Fujitsu Stylistic ST5111w/WiFi and dock, internal Hitachi 500G HD, external 1TB HD, Sierra Wireless Aircard 550, DVD-RW, BoomzBox HD radio, XM Commander, Delorme GPS, Saitek X-52 Pro joystick, BluSoleil Bluetooth, TPMS, FB, Elm327

  3. #3
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    Quote Originally Posted by GizmoQ View Post
    The XM Direct is designed for auto installs and doesn't have to be powered via your M2. Just tap into any 12V and ACC, but ground it well .
    I tried plugging it directly into a wallwort from radio shack. The XMDirect unit fried and started smoking (had to buy a new one). I assume it is because the wallwort outputs 13.8 volts, but from what I have read it is not uncommon for the ACC wire to push 14 volts or so. Don't I need to regulate the current going to the unit?

  4. #4
    The Last Good Gremlin GizmoQ's Avatar
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    Quote Originally Posted by jschu81 View Post
    I tried plugging it directly into a wallwort from radio shack. The XMDirect unit fried and started smoking (had to buy a new one). I assume it is because the wallwort outputs 13.8 volts, but from what I have read it is not uncommon for the ACC wire to push 14 volts or so. Don't I need to regulate the current going to the unit?
    Damn, that bites.

    I've got one plugged into a "wallwort" now thats been running four years. Also have XM Commanders (same box, extra features) that are wired directly to the fuse box of two of my cars without any issues. One was actually connected with both the ACC and 12v using the same power source for a while till I found an accessible ACC line.

    Sure you didn't cross the wires? Then again Radio Smuck could be the culprit.
    HARDWARE: Fujitsu Stylistic ST5111w/WiFi and dock, internal Hitachi 500G HD, external 1TB HD, Sierra Wireless Aircard 550, DVD-RW, BoomzBox HD radio, XM Commander, Delorme GPS, Saitek X-52 Pro joystick, BluSoleil Bluetooth, TPMS, FB, Elm327

  5. #5
    Constant Bitrate Zeroaviation's Avatar
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    i have done the same(fried my box, using the cars ACC wire), i was told that old xmdirect boxes with external power inputs(not through the cable) are regulated and filtered, but the newer ones, that u power nthrough the cable are not filtered nor regulated, therre are done so through the smart adapter that u are supposed to buy to hook it up to a head unit. (thats the way XM support explained it) now, wether that bears truht im not shur, i have mind now powered through my opus, no problems whatsoever....
    Im a pilot.

    I have become a cross control stall.

  6. #6
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    So can anybody recommend a power supply/regulator, that outputs a 12v rail and a 5v rail that will be easy to hook up with my existing m2?

  7. #7
    Neither darque nor pervert DarquePervert's Avatar
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    Have you looked in the FAQ yet?
    How about the Wiki?



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