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Or remove power from that line last? Turn on power triac – proposed circuit analysis 0.
F9540N Datasheet PDF
My solution is probably a bit overkill or simply a way to make simple thing amazingly difficult Mon Datasheeh 07, 3: Hi, All i know it’s P channel Mosfet. Of course this is no solution to your problem since: Tue May 08, 8: I suspect a regular SATA at least if not doing any task,would be switchable by an inline switch on the 12 v feed. How do you guys sort this out? I plugged the slave drive in after hearing the master spin down. This is because data connector also has GND pins Those were just guesses, I have made no calculations on how the circuit should react on switch movements.
So, you may have to enable some operating system independent power saving feature. First I’d like to know what you have tried so far.
Mon May 07, 2: Reading a transistor datasheet? It’s in TO package. It’s not complete spindown but it is usually enough to make the drive noise inaudible in a system. Measuring air gap of a magnetic core for home-wound inductors and flyback transformer 7.
There’s three ways to shut down the HDD: Originally Posted by Pharaoh of Egypt.
I don’t know how to make this both simple and safe. Your controller has to support delayed spin-up. Remember that fans only use one voltage and ground. How reliable is it?
Tue May 08, 2: How this is done, I think the HDD remains in in waiting state until it receives a special dwtasheet from controller to initialize.
While I wouldn’t do it regularly, I recently did it accidentally–no harm done. I will look at HDDScan if i want to quieten down seek any further on the main drive. HDDs spin up when they are powered up, even with data cable removed. AF modulator in Transmitter what is the A? You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments datashet this forum.
I’ll have to calculate some values for resistors to obtain proper delays for voltage rise and satasheet on each line. Similar Threads RF power transistor datasheet question 5. I’ve seen this question several times If it is a Microwave power Transistor.
PNP transistor not working 2.
IRFN MOSFET Datasheet pdf – Equivalent. Cross Reference Search
Losses in inductor of a boost converter 8. My eyes jumped open when the hard drive in my hand unexpectedly spun up as soon as I plugged in the molex. Tue May 08, 7: If you nuild a switch: You can even prevent spin-up of Hitachi IDE drives by configuring them to delayed spin-up. But apparently, under XPs power management menu, I can’t specify windows to idle my 2nd hard drive only, and not both of my hard drives?
SATA is supposed to hot swap-and I’d think most mobos and drives would be fine with that.