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(More customer reviews)I've created my own "home entertainment center" ventilation system, using a 200mm silent high-flow-volume fan intended for computer use. The 200mm fan, mounted on rubber isolation mounts in front of a hole in the back of my stereo cabinet, effectively eliminates the tendency of my stereo cabinet (and the components inside of it, obviously) to get hot during use. But I needed a way to power it. The fan has a standard "3-pin fan connector" as commonly found inside of PCs (usually found on the motherboard itself). I needed a 12V power supply to drive that fan.
In order to use this device in that manner, I snipped off the coaxial plug, and crimped terminal pins onto the exposed wires, and inserted those into the appropriate Molex connector (leaving one of the three pins, the one while would normally be used for tachometer signals, unpopulated). I put a small in-line switch into the circuit between these two connectors (a thermally-controlled switch could have been used as well, had I chosen to, though most of those require an additional 5V line input for their electronics, which would have made this device, with just 12V+ and ground lines, unsuitable).
I'm sure that if you have any other device which doesn't require a very "clean" power supply, this is ideal. As the other review makes clear, this is a switch-regulated power supply, not a linear-regulated power supply. (There is no such think as a "normal" regulated power supply!)
If you don't know the difference, read this:
"A switched-mode power supply (switching-mode power supply, SMPS, or simply switcher) is an electronic power supply that incorporates a switching regulator in order to be highly efficient in the conversion of electrical power. Like other types of power supplies, an SMPS transfers power from a source like the electrical power grid to a load (e.g., a personal computer) while converting voltage and current characteristics. An SMPS is usually employed to efficiently provide a regulated output voltage, typically at a level different from the input voltage.
"Unlike a linear power supply, the pass transistor of a switching mode supply switches very quickly (typically between 50 kHz and 1 MHz) between full-on and full-off states, which minimizes wasted energy. Voltage regulation is provided by varying the ratio of on to off time. In contrast, a linear power supply must dissipate the excess voltage to regulate the output. This higher efficiency is the chief advantage of a switch-mode power supply.
"Switching regulators are used as replacements for the linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated, their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor."
So, you're unlikely to ever find a linear-regulated supply in a package this compact. If you need a very clean power input, you'll need a bulkier, heavier, and more expensive device, I'm afraid, and you'll trade "efficiency" (think less wasted energy) for the less noisy signal that a linear regulated supply provides.
Click Here to see more reviews about: 12v 500ma Regulated Power Supply for Security Camera and Small Electronics BPB
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