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XcOM
09-02-2007, 07:02 AM
Question, i don't have a multimeta to and, so, does anyone know what the voltage is for the HDD activity line?
Bucko
09-02-2007, 07:20 AM
generally 3v
XcOM
09-02-2007, 09:48 AM
Thank you, +rep

i can't find my multimeta so i couldn't check, just so i don't blow some LED's.

XcOM
xmastree
09-02-2007, 12:07 PM
It'll be 5V, with a suitable resistor for the LED.
Bucko
09-02-2007, 05:50 PM
I've never run a resistor with my HDD LED. I've always just hooked it straight up to the header pins.
Spawn-Inc
09-02-2007, 08:22 PM
I've never run a resistor with my HDD LED. I've always just hooked it straight up to the header pins.

same here, when i changed out the stock leds i just changed the leds, there was just wire. i believe the mobo makes build in the resistors.
Bucko
09-02-2007, 08:28 PM
The MoBo will probably just use the 3.3v feed from the PSU for the LED.
xmastree
09-03-2007, 01:44 PM
The MoBo will probably just use the 3.3v feed from the PSU for the LED.

No, the mobo will have 5V and a suitable resistor, like I said.

Try hooking your PSU's 3.3V line directly to an LED if you like, but wear safety glasses... :eek:
crenn
09-04-2007, 09:43 PM
I also don't recommend putting LEDs in USB ports.... it blew up in my fingers and stung for a while. I'm still alive though!
crazybillybob
09-05-2007, 04:57 PM
USB is 5V @ 500Ma max....Your 3V LED will go super nova In under a second:hurt:

But yes the mobo's should have a resistor build in. Don't try and run to many LED's off of the HDD light pins as they're not designed to drive much.


CrazyBillyBob