What is the maximum safe operating voltage for a Playstation 2 controller, and can I ground it to the battery / supply?

Seeing as I'm rigging up a PS2 controller to my computer by parallel port, but I want to use an external power supply (don't fancy using the Parallel for voltage if I can avoid it), I need to know the maximum safe operating voltage of the PS2 control. I would also appreciate if someone could tell me the minimum voltage as well. Also, I need to know if I can ground it directly to the power supply, whether the supply is a battery pack or a wall wart, or do I have to ground it by Parallel Port to the computer?

Madrias357 (author) 7 years ago
Ah, never mind. I'll just use my USB port, however limited it may be.