Powering a CD-ROM drive without a PC

Hi, I'm new here so sorry if I'm doing something wrong or have posted in the wrong place! lol I'm trying to build a CD player using an old CD-Rom drive from an old PC. I've done some research to into how to power it, but everything I've found seems really over complicated and involves big power supply units and stuff. 
I got this idea that I could use a 5V ac adapter from USB phone charger, and connect the red and black wires from the USB lead to the red and black of a Molex 4 pin thingy. Then a 12V ac adapter and connect the wires to the yellow and black of the molex thing. 


As you can probably see, I don't know much about this kind of stuff, but i understand that the red wire on a molex 4 pin thing is the 5V wire, and the yellow is the 12 V, so if i connect two adapters to each of these should it be suffiecient to power my CD-ROM drive? 

Thanks for any help, and sorry if this is a stupid question! 

in a computer they are all the same ground you may need to connect the grounds together.
Not sure if it would work but try using a computer power supply they should give you a smooth & stable power supply & they are cheap(go check on ebay )