Newbie question: circuit for harddrive indicator
From: fob (rwinder_at_cameron.net)
Date: 01/05/05
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Date: 5 Jan 2005 14:27:04 -0800
Folks:
I want to light up an ultra violet reactive 120mm computer case fan
with UV LED's whenever my harddrive is accessed.
I figure that I will use 3 UV LEDS to light up the fan, and the 3 LED's
will be activated by a transistor that is triggered off of the computer
motherboard's harddrive LED connector.
Problem is that I don't have any idea how to do this. I figure I will
need to power it off of a molex connector from the power supply (5v or
12v) and use a combination of resistors, a transistor and maybe other
stuff (like caps and/or a voltage regulator). I do know that LED's are
2.4v devices and are polarized.
Has anyone seen this type of circuit or know how to make one?
Thanks for any help you can provide.
Fob
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