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Subject: Re: Getting hard drive activity signal from hard drive
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Date: Tue, 17 Dec 2002 07:14:32 GMT
NNTP-Posting-Date: Tue, 17 Dec 2002 08:14:32 MET
> Hi - some RAID controllers don't have headers for HD activity LEDs on
> - so I was wondering if there is a way to hook up the HD LED directly
> to one of the hard drives. What I was thinking was that, looking at
> the IDE pinout here: http://technick.net/pinconhdd_ide_int.php that I
> could attatch an optocoupler to pin 39 and to ground (for the
> transmitter part) and then the other side would be attatched to
> ground and the LED, which would be attatched to the positive power
> supply. Am I correct? Would that work and not endanger the hard drive
> at all? Thanks so much!
Just directly connect the LED and a resistor in series to 39 and 40.
electronic hardware designer
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