LED power/reset buttons

[vong]

Hi all,

 

Thinking of putting 2 of these in my server case because I couldn't be effed to open the door when I need to use those buttons. I can use the HDD activity pins to make the LEDs on the buttons work right? I've wired these kinds of buttons up before but not with an LED so I think the LED would only turn on if the button is pressed.

[BobVonBob]

Won't work. The LED voltage on those switches is 12V, and HDD activity and power light outputs on the motherboard are 5V.

[vong]

8 minutes ago, BobVonBob said:

Won't work. The LED voltage on those switches is 12V, and HDD activity and power light outputs on the motherboard are 5V.

I can get 5v ones.

[BobVonBob]

Just now, vong said:

I can get 5v ones.

If you get 5V ones then yes it would work fine. The LEDs have separate power, that's why there are 4 pins on the back of the switches, 2 for the switch, 2 for the LED.

[vong]

2 minutes ago, BobVonBob said:

If you get 5V ones then yes it would work fine. The LEDs have separate power, that's why there are 4 pins on the back of the switches, 2 for the switch, 2 for the LED.

Ah, so the led circuit is always closed then.

[The Household Technician]

Those LED's require 12v, you can't power them off the HDD LED cause that runs on 3.3v. You'll have to run a cable from a molex connector. Also that button has separate pins for the button itself and the LED, so pressing the button won't necessarily turn the light on.