M2-ATX(-HV) 160 watt Intelligent DC-DC PSU

I have the HV version and I've noticed exactly the same thing as others have posted, the PSU works fine on bench and during boot in car, and does HARD off when the ignition is turned off.

I have a switch hooked up to the ignition line for the computer which is either "on" (+12v) or "ignition" (whatever state the ignition is in) with a center "off" position.

I've noticed that if I flip the switch to off before turning the ignition off, it works correctly. So the problem is something to do with the +12v line going from ~14v to ~12v (charging system / alternator turning off) AND ignition going from logic high (higher then ~10v) to logic low (0v) at the *exact* same time. I say exact because i've tried to flip the switch and ignition at the same time, and I've gotten close so I think that *any* amount of time delay from logic low to a sudden ~2v drop on the +line

I was more wondering if anyone has tried any other PSU's the M1, M3, or M4. With the M4 does anyone know if it controls power state through the USB connection (sweet) or is that just a fancy program for showing me the output voltage of the PSU (fairly dumb)?

Does anyone have a picture with the m2 atx all hooked up to a board? I want to make sure I have all my ducks in a row before I power her on.

Also, do you guys use the case led power indicator lights hooked up to your mobo, or do you have your power led's connected to the m2?

btw the instructions for this product are **** poor.

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Originally Posted by Belo

Does anyone have a picture with the m2 atx all hooked up to a board? I want to make sure I have all my ducks in a row before I power her on.

Also, do you guys use the case led power indicator lights hooked up to your mobo, or do you have your power led's connected to the m2?

btw the instructions for this product are **** poor.

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yea i too would like to see this...

i still dont get how to hook up my power switch, does it matter, or is it polarized, and if so, what is what. same for J6... what is +?

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Originally Posted by tongputer

yea i too would like to see this...

i still dont get how to hook up my power switch, does it matter, or is it polarized, and if so, what is what. same for J6... what is +?

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i have the pic i took myself now :) I'll post it later

So, I took the M2 right out of it's package, hooked the 12V, ignition, and gnd to a DC power supply set to 12V. The board powers up and switches when i ground and energize the ign wire, but when we plugged the ATX connector into our cpu, the cpu nothing happens. The board draws 400mA just by itself it seems. We probed the power pins on for the HD and there is no voltage. Is there anything special I need to do to get an output voltage? My M2 came with zero documentation, but from what I hear the information contained in the documentation is pretty sparse.

Any help would be greatly appreciated.

Thanks!

Quote:

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Originally Posted by bbenoy

So, I took the M2 right out of it's package, hooked the 12V, ignition, and gnd to a DC power supply set to 12V. The board powers up and switches when i ground and energize the ign wire, but when we plugged the ATX connector into our cpu, the cpu nothing happens. The board draws 400mA just by itself it seems. We probed the power pins on for the HD and there is no voltage. Is there anything special I need to do to get an output voltage? My M2 came with zero documentation, but from what I hear the information contained in the documentation is pretty sparse.

Any help would be greatly appreciated.

Thanks!

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http://resources.mini-box.com/online...anual-engl.pdf

Does anyone know if the M2ATX PSU harness/cables can be purchased separately from the PSU itself? I picked up an M2ATX that had seen better days, with several of the capacitors bulging and ready to die at any moment. I recapped the entire board with top shelf Panasonic capacitors, but now can't seem to find a ready source to buy the harness to connect it to my Zotax mini-ITX MoBo.

Will I have to assemble one from parts or can one be bought outright? I really don't want to have to spend any more time monkeying with this...
Thanks.

Im thinking about locating my new car pc where my old head unit is to save on cable extensions and such. Would reusing the old 12v and 5v lines that were going to the head unit be ok with this power supply? Or should I run new lines? Can't I just steal power from the switched 5v red wire as my ignition wire? I do plan on running a new ground wire to the chassis regardless. Thanks!