12V dv hack to psu

S

SNIPE

Banned

• Jul 12, 2010

• #1

this is a USB express card reader which uses its own transformer

**broken link removed**

the psu motherboard and ports i'm using is from the new mac mini

i am making a computer enclosure for all this so the card reader needs to be internally mounted but it has its own 12v dc supply, is they a way to get the power to the card reader from the mac mini internal psu?

Apple (United Kingdom) - Mac mini - The most affordable, energy-efficient Mac.

 

Last edited: Jul 12, 2010

Menticol

Active Member

• Jul 12, 2010

• #2

I've never dismantled a Mac. Can you see any Yellow-Black-Black-Red wire molex comming from a box? Maybe the ones that power up the CD unit?

 

Last edited: Jul 12, 2010

S

SNIPE

Banned

• Jul 13, 2010

• #3

they is a molex/PATA which ill be converting to a SATA with a board for the CD player

but the PSU plugs into the wall as the psu is internal,the power supply from the express card reader is the same type too

any pics of the connectors, see the links ^ ^ ^

 

Last edited: Jul 13, 2010

Menticol

Active Member

• Jul 13, 2010

• #4

Take 12 volt from the CD player, how much amps does the reader consume?

 

S

SNIPE

Banned

• Jul 13, 2010

• #5

12V maximum

 

Menticol

Active Member

• Jul 13, 2010

• #6

No Snipe, 12 are the volts. I mean amperes. According to your site the device consumes 3 Watt, so:

W = V x A

A= W / V

A= 0,25 amperes

No problem if you plug it into the 12V line feeding the CD unit!

 

S

SNIPE

Banned

• Jul 14, 2010

• #7

so thats the yellow (12v)
and black (GND)
wires?

 

Reloadron

Well-Known Member

Most Helpful Member

• Jul 14, 2010

• #8

SNIPE said:

so thats the yellow (12v)
and black (GND)
wires?

Click to expand...

Yes.

Ron

 

S

SNIPE

Banned

• Jul 14, 2010

• #9

wont that give me 6 volts for the card reader and 6 volts for the CD player?

 

Menticol

Active Member

• Jul 14, 2010

• #10

No if you do it as shown

(see attached picture)


PS: You should read some electronics basics, specially about in-series and parallel circuits. That will help you a lot on future modding projects

 

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Last edited: Jul 14, 2010

S

SNIPE

Banned

• Jul 15, 2010

• #11

ok, and on the other side of those yellow and black wires is the PSU

 

Last edited: Jul 15, 2010

Reloadron

Well-Known Member

Most Helpful Member

• Jul 15, 2010

• #12

Yes. Should be.

Ron