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Recent content by gazownik

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    Partition issues - sectors.

    Hi all, I'll do my best to be as concise as possible: I have a 250GB HDD, with an OS installed on it (XP Embedded). Here's how the situation looks like: First partition is used by some Korean disk cloning software (or an image of the system) - Clonix. Second one is assigned to Win XPE OS...
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    Please help. Universal adjustable power supply, 3-12V.

    Hello again, Thanks for your help guys, I'm doing it just for fun (so no worries about the price - and I'm aware that this junk is of Chinese origin :D ). I did some tests in the meantime and seems that both the driver and power transistors are dead (the latter has cracks on its casing). I'm...
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    Please help. Universal adjustable power supply, 3-12V.

    Hi there, what I have here is a cheap 3-12V power supply, probably something resembling the one below: more detailed pictures here: The problem with it is that it's completely dead. I disassembled it and checked electrical connections with a voltmeter set to "beep" (diode test). The...
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    Lame question-simulating simplest AC/DC+buck converter in PSPICE

    Many thanks for all your remarks, they are indeed helpful. The biggest problem for me lies in determining how the particular transistors should be connected depending on their type, i.e. which and when. Diagrams available on the net also confuse me a bit: While I found this one in an...
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    Lame question-simulating simplest AC/DC+buck converter in PSPICE

    Thanks Keith, As I said-this is something totally new to me, so I guess I'm going to do a lot of mistakes while learning. The circuit I posted above is the newer one, while the first one I tried to simulate was as follows: This one had its Vpulse in referrence to the ground, the 1k base...
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    Lame question-simulating simplest AC/DC+buck converter in PSPICE

    Hello everyone, I'm totally new here, so I'll just start from the beginning: For the past few weeks I've been trying to properly simulate the behaviour of a simplest AC/DC circuit (i.e. Vsin simulating the stepped-down voltage from the transformer output + full wave rectifier + capacitor for...

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