How's your trivia? (hardware help)

[Insidious]

OK,

So I get home from work, and find that somehow

a couple of these really cool Blue LEDs hitchhiked a ride home with me.

My question: When I give them a nice home on my PC face, do I need to install current limiting resistance with them, or is the

series resistance on the MoBo?

TIA,

-Sid

 

[Insidious]

Srry Mods. I know it hasn't been very long.... this will be the only bump.

 

[ai42]

Depends what kind of LEDs.

Most LEDs run 3.3v but 5v may be possible.

Assuming they are 3.3v LEDs
12v --> 470ohm resistor --> LED
5v --> 130ohm resistor --> LED

Or straight off Mobo LED plugs no resistor nessecary.

 

[Insidious]

Or straight off Mobo LED plugs no resistor nessecary.

Ah yes, that is the info I was looking for! (I am replacing power and maybe HD display lamps with Blue..... from MoBo header)

(2.5V or greater will drive any LED... just a matter of limiting that current to avoid burn-out)