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Author Topic: ccfl hdd activity indicator?  (Read 1707 times)

DiddlySquat

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ccfl hdd activity indicator?
« on: September 03, 2003, 05:54:35 PM »

Hey everyone.  I've been googling around for this for awhile now.  Does anyone know where to find a guide for a ccfl that throbs according to hdd activity?  Or does anyone know how to do it?  I saw something similiar one time but i didnt get all the details on how they did it.  :idiot:   Any help would be great. Thanks!
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renderblender

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ccfl hdd activity indicator?
« Reply #1 on: September 03, 2003, 06:02:17 PM »

you could hook it up using a relay.
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Geet Lord

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ccfl hdd activity indicator?
« Reply #2 on: September 03, 2003, 06:05:02 PM »

x24 told me to use an "optoisolator" (i think) to do the same thing with a series of leds its more or less an optical relay so that the ccfl circut will be isolated from your mobo
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viridius

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ccfl hdd activity indicator?
« Reply #3 on: September 03, 2003, 07:11:37 PM »

A relay isn't the best (or even a good) way to flash a CCFL.  Solid state is definitely the way to go.  Optoisolator with a darlington output or a FET/MOSFET.
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DiddlySquat

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ccfl hdd activity indicator?
« Reply #4 on: September 03, 2003, 07:43:38 PM »

what is a darlington output and a FET/MOSFET?
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viridius

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ccfl hdd activity indicator?
« Reply #5 on: September 03, 2003, 09:04:19 PM »

An optoisolator uses a LED and a phototransistor to transmit the signal.  The phototransistor usually can't source enough current to run a CCFL inverter, so you use one with a darlington output, where a higher current transistor is activated by the phototransistor.  A FET is a power transistor and a MOSFET is a high power transistor.
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