HD Activity LED Mod

[Shez]

I've been big on messing with LEDs lately and for an up coming mod, I was wondering if it were possible to change a single HD activity LED into a parralled string of four.

The mobo manual, for the HD activity LED, states...
1 HD_PWR Out
Hard disk LED pullup
(330 "Omega") to +5 V

I've done the calculations and if I had 4 LEDs in parrallel, I'd be pulling roughly 100mA. Would a header pin be able to supply that sort of amperage?

Hardware references:
■Yellow/orange LEDs that need: 1.8-2.0V @ 30mA
■mini-ITX mobo w/ pico-PSU http://www.mini-box.com/D201GLY2A-kit

 

[Shadow703793]

You should be able to put at least 3 as I have done this exact mod (along with the Blink Code mod for POST code ). Just make sure you get some not very bright (ie not the SupperBright LEDs) and you should be set. Since you are using a m-ITX board I don't know if the power is enough, as I have not worked with ITX boards yet. (Do plan on doing a mod around a ITX during summer thugh)

 

[Shez]

Thanks for the response Shadow. Did you just try the mod and hope for the best or is there a resource that you turned to, to figure out how many LEDs you could actually use?

Does anyone else perhaps know the amperage I could expect out of a header pin?

 

[Shadow703793]

No resources. Just got the idea and did it. Add 1 LED at a time and you should be fine.