what fuckery is this!?

[goontron]

look at these bricks, how have they not killed the HDD they power yet? can i replace them with this powerman PSU because its only 300w rated and it actually has input filtering?

[eccerr0r]

Re: what fuckery is this!?

A power supply should only care about noise passed to its secondary circuit.
Noise it generates itself that passes upstream...well it's not its problem. Some of these devices' parts are small enough that it won't generate that much noise to pass upstream (low impedance loads and long extension wires connected on the same circuit tend to low pass filter the noise anyway), so they omit these parts...

As the chicken hatchling goes... Cheep cheep cheep...

I still think the half bridge cell phone chargers are the more worrisome PSUs... Have enough of them, and it would cause some power factor annoyance...

[lti]

Re: what fuckery is this!?

I think the output filtering is a bigger problem.

Look at how the output devices are mounted to the heatsink.

[Behemot]

Re: what fuckery is this!?

Well, if it was fan-cooled, at least the airflow would be nice. It's not really crowded inside

[goontron]

Re: what fuckery is this!?

so can i use the powerman PSU instead of this fuckery? and the bricks turn into a cookery when running!

[Behemot]

Re: what fuckery is this!?

If you want to carry that thing with you…

[dmill89]

Re: what fuckery is this!?

so can i use the powerman PSU instead of this fuckery? and the bricks turn into a cookery when running!

Yes, as long as the pin-out is correct, you'll have to jumper the ATX connector on or wire in a switch. Granted using a 300w ATX PSU to run a drive or two that might draw 5W ea. is a little overkill, but if you don't have any other use for it, it might not be a bad option.

[goontron]

Re: what fuckery is this!?

If you want to carry that thing with you…

its about the size of both bricks, and how many more drives can it run

do you think i might need a 5v minimum load resistor?

[Behemot]

Re: what fuckery is this!?

I have the feeling hard drives consume something on +5 V. The question is what the efficiency will be and how the ripple will look.

[goontron]

Re: what fuckery is this!?

I have the feeling hard drives consume something on +5 V. The question is what the efficiency will be and how the ripple will look.

i know hard drives use about 150mA on 5v and the rest is 12v, so the ripple might be high on the 5v rail and for the efficiency, well, its probably more efficient than my zenith 12 valve valve radio set

[Pentium4]

Re: what fuckery is this!?

if you're using 2.5" drives, those only use 5V

[goontron]

Re: what fuckery is this!?

if you're using 2.5" drives, those only use 5V

it will run laptop drives (blue-ray and HDD) and desktop drives (iomega ZIP, dvd, and HDD). i have noticed that my quantum BIGFOOT HDD didn't like those bricks

here is one of the adapters (the adapters are good not the bricks)
http://www.microcenter.com/product/2...to_USB_Adapter

yay 701 posts

[goontron]

Re: what fuckery is this!?

here is the second adapter http://www.microcenter.com/product/3...E-SATA_Adapter

and here is the pics of the adaption. you might notice that i kept the power-good wire, im not sure what to do with that

[Behemot]

Re: what fuckery is this!?

Stick it wherever you want That's just signal for MoBo that everything is OK and it is safe for it to turn on.

[eccerr0r]

Re: what fuckery is this!?

This reminds me of something.

A long time ago I tried using an IBM AT PSU (yes the real one) in this manner to power hard drives. It's even easier for these AT PSUs because you don't need to ground the green pin to turn it on.

First thing that happened when I tried the HDD?

Fried the HDD. Magic smoke leaked out.

Then I noticed the minimum load needed and it was fairly hefty.

*sigh*

[Behemot]

Re: what fuckery is this!?

Must have been some crap, I have pretty old Enlight Corporation PSU, I say pretty good for an AT, I've run so much stuff on that without any extra load…just turn it on, tha's all I need to do…

[kaboom]

Re: what fuckery is this!?

This reminds me of something.

A long time ago I tried using an IBM AT PSU (yes the real one) in this manner to power hard drives. It's even easier for these AT PSUs because you don't need to ground the green pin to turn it on.

First thing that happened when I tried the HDD?

Fried the HDD. Magic smoke leaked out.

Then I noticed the minimum load needed and it was fairly hefty.

*sigh*

Those could "spike" connected loads as the PWM "skips" after it overshoots. Without enough load, "continuous current operation" never happens, in addition to said overshoot.

Those old AT supplies were rather tough, but seemed to be more sensitive to loading than newer supplies.

I think that some only used one output for PWM feedback, counting on proportioning of load current to even out the voltages.

With newer (1998+) supplies, not only does the coupled output inductor help, but the +5 and +12 are summed, proportionally with resistors, for feedback. This is why they can be worse with +5/+12 "crossloading," but better (safer) in a case of no load.

Better yet, some supplies simply shut down during such "unregulation" under light load, as +5, for example, heads toward 5.4v with only +12 loaded. Hence the "5v minimum load" resistor, when using such supplies for 12v-only.

The old-fashioned alternative would be for +5 to become 6v or more...

[goontron]

Re: what fuckery is this!?

the powerman PSU handles it fine...

[kaboom]

Re: what fuckery is this!?

the powerman PSU handles it fine...

Not surprising at all.

OTOH, I once tried operating the PS out of a Compaq Deskpro 386s outside the system, no load.

That thing sounded like squeaking crickets or grasshoppers! Evidently, no damage was done, since it still worked when put back in the system. I wonder what those voltages were like...

Gimme a break- I think I was 12 or something...

[goontron]

Re: what fuckery is this!?

DOH, i just put 12v to a 5v HDD