«

Soooo.. How do I wire this to a molex so I can use it to power an external
drive?

http://test.internet-webmaster.de/upload/1235341166.jpg

Is it adequate?

Thanks.
--
Shaun.

"Build a man a fire, and he`ll be warm for a day. Set a man on fire, and
he`ll be warm for the rest of his life." Terry Pratchett, Jingo.

On Sat, 30 May 2009 12:51:11 +1200, "~misfit~"
<> wrote:

>Soooo.. How do I wire this to a molex so I can use it to power an external
>drive?
>
>http://test.internet-webmaster.de/upload/1235341166.jpg
>
>Is it adequate?
>
>Thanks.

Startup power is more than that supply is rated for. Example: My old
IDE ST3160023A requires 2.8 A on 12 V at startup.

Somewhere on teh intarwebs Stephen Worthington wrote:
> On Sat, 30 May 2009 12:51:11 +1200, "~misfit~"
> <> wrote:
>
>> Soooo.. How do I wire this to a molex so I can use it to power an
>> external drive?
>>
>> http://test.internet-webmaster.de/upload/1235341166.jpg
>>
>> Is it adequate?
>>
>> Thanks.
>
> Startup power is more than that supply is rated for. Example: My old
> IDE ST3160023A requires 2.8 A on 12 V at startup.

Hmmm, yeah, you have a point. I have a powersupply that came with a
(Chinese) USB - IDE adapter and it's *rated* as 2A on each voltage. It's 1/3
the size/weight of the ZyXEL unit and I was hoping that, with ZyXEL having
the repuation that they do, it would have 'headroom' enough. I don't really
want to gamble a HDD / data on it though. Would it output more power on NZ
mains as the ZyXEL unit is multi-voltage (100-240VAC 50/60Hz)? LOL, maybe
not.

Perhaps it might be useful for externally utilising a DVD drive? (I kept the
damn PSU for years with the intent of one day finding a use for it!) The PSU
is impressively large and heavy for it's rating, is vented top and bottom
and has a switch and LED (solid for normal, flashing for no power draw).
Seems a shame to wase it.

Cheers,
--
Shaun.

"Build a man a fire, and he`ll be warm for a day. Set a man on fire, and
he`ll be warm for the rest of his life." Terry Pratchett, Jingo.

"~misfit~" <> wrote in message
news:gvpvu1$rf$...
> Soooo.. How do I wire this to a molex so I can use it to power an external
> drive?
>
> http://test.internet-webmaster.de/upload/1235341166.jpg
>
> Is it adequate?
>
> Thanks.
> --
> Shaun.
>
> "Build a man a fire, and he`ll be warm for a day. Set a man on fire, and
> he`ll be warm for the rest of his life." Terry Pratchett, Jingo.
>



Shaun

Molex connections here; http://en.wikipedia.org/wiki/Molex_connector

Yellow = 12v positive
Black = 0V
Red = 5V positive.

You should be able to ignore the -12V.

I would think the current sufficient for modern drives.

Best
Paul.

Somewhere on teh intarwebs PeeCee wrote:
> "~misfit~" <> wrote in message
> news:gvpvu1$rf$...
>> Soooo.. How do I wire this to a molex so I can use it to power an
>> external drive?
>>
>> http://test.internet-webmaster.de/upload/1235341166.jpg
>>
>> Is it adequate?
>>
>> Thanks.
>
> Shaun
>
> Molex connections here; http://en.wikipedia.org/wiki/Molex_connector
>
> Yellow = 12v positive
> Black = 0V
> Red = 5V positive.

Yup, thanks. I've wired a few things a bit differently to normal over the
years (fans etc.).

> You should be able to ignore the -12V.

The main thing I wanted cleared up is that the two black wires on a molex, I
just connect them to 'ground' on this PSU? Seems logical to me but I just
wanted to be sure.

> I would think the current sufficient for modern drives.

Cheers, Yeah, I think so too. I've looked at some data sheets and graphs
from Seagate last night and, although they say peak load of 2.8A on the 12V
the graphs they've published show that the actual current peaked at around
1.5A and stayed there for about six seconds on start up before dropping back
to below 1A.

http://test.internet-webmaster.de/upload/1243724725.jpg

That's for the 7200.7 family of drives and is likely typical of most from
the last 10 years.

2.8A is probably a worst-case scenario, with a margin for error built in by
Seagate.

Also, this ZyXEL PSU is rated at continuous 1.5A, I feel quite confident
that it would handle 2.8A for a split-second if the drive were to actually
pull that much.

Thanks Paul,
--
Shaun.

"Build a man a fire, and he`ll be warm for a day. Set a man on fire, and
he`ll be warm for the rest of his life." Terry Pratchett, Jingo.

"~misfit~" <> wrote in message
news:gvse7b$jgg$...
> Somewhere on teh intarwebs PeeCee wrote:
>> "~misfit~" <> wrote in message
>> news:gvpvu1$rf$...
>>> Soooo.. How do I wire this to a molex so I can use it to power an
>>> external drive?
>>>
>>> http://test.internet-webmaster.de/upload/1235341166.jpg
>>>
>>> Is it adequate?
>>>
>>> Thanks.
>>
>> Shaun
>>
>> Molex connections here; http://en.wikipedia.org/wiki/Molex_connector
>>
>> Yellow = 12v positive
>> Black = 0V
>> Red = 5V positive.
>
> Yup, thanks. I've wired a few things a bit differently to normal over the
> years (fans etc.).
>
>> You should be able to ignore the -12V.
>
> The main thing I wanted cleared up is that the two black wires on a molex,
> I just connect them to 'ground' on this PSU? Seems logical to me but I
> just wanted to be sure.
snip

Yep both black wires are at 0 Volts.
If you examine the internals of a Power Supply you will see all the black
wires are soldered to the same copper land on the the PCB.

Best
Paul.

Somewhere on teh intarwebs PeeCee wrote:
> "~misfit~" <> wrote in message
> news:gvse7b$jgg$...
>> The main thing I wanted cleared up is that the two black wires on a
>> molex, I just connect them to 'ground' on this PSU? Seems logical to
>> me but I just wanted to be sure.
> snip
>
> Yep both black wires are at 0 Volts.
> If you examine the internals of a Power Supply you will see all the
> black wires are soldered to the same copper land on the the PCB.

Thanks Paul, that's what I thought but I just wanted someone to blame if it
goes "Bang!" <g>

Cheers,
--
Shaun.

"Build a man a fire, and he`ll be warm for a day. Set a man on fire, and
he`ll be warm for the rest of his life." Terry Pratchett, Jingo.