Price : $1.12
Product Description
This high quality AC adapter is useful for many applications. In most applications, you can use an adapter with a higher capacity. However, always select an adapter with the same voltage. Specifications: Power output: 12 VDC, 500 mA Maximum power output: 6W Input requirements: 120 VAC, 60 Hz Plug tip size: 2.1 x 5.5 mm Polarity: Center-negative UL approved Cord length: 6 feet. Note: Output voltages are rated at full load. No load voltages can be up to 50% higher.
Customer Reviews
I've designed my personal "dwelling entertainment center" ventilation method, making use of a 200mm silent high-flow-volume fan intended for laptop use. The 200mm fan, mounted on rubber isolation mounts in front of a hole in the back of my stereo cabinet, properly eliminates the tendency of my stereo cabinet (and the elements inside of it, of course) to get hot during use. But I needed a way to power it. The fan has a common "3-pin fan connector" as usually located inside of PCs (commonly located on the motherboard itself). I required 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 suitable Molex connector (leaving a single of the three pins, the one even though would typically be made use of for tachometer signals, unpopulated). I put a small in-line switch into the circuit in between these two connectors (a thermally-controlled switch could have been utilised as well, had I chosen to, though most of those call for an further 5V line input for their electronics, which would have made this device, with just 12V+ and ground lines, unsuitable).
I am sure that if you have any other device which doesn't require a especially "clean" power supply, this is excellent. As the other review tends to make clear, this is a switch-regulated power provide, not a linear-regulated power supply. (There is no such feel as a "normal" regulated power supply!)
If you don't know the difference, read this:
"A switched-mode power provide (switching-mode power supply, SMPS, or just switcher) is an electronic power supply that incorporates a switching regulator in order to be very effective in the conversion of electrical power. Like other kinds of power supplies, an SMPS transfers power from a supply like the electrical power grid to a load (e.g., a private laptop) whilst converting voltage and current characteristics. An SMPS is ordinarily employed to efficiently produce a regulated output voltage, ordinarily at a level diverse from the input voltage.
"As opposed to a linear power supply, the pass transistor of a switching mode supply switches especially swiftly (usually between 50 kHz and 1 MHz) between complete-on and complete-off states, which minimizes wasted power. 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 provide.
"Switching regulators are utilised as replacements for the linear regulators when greater efficiency, smaller size or lighter weight are needed. They are, on the other hand, way more difficult, their switching currents can cause electrical noise difficulties if not thoroughly suppressed, and simple styles could possibly have a poor power element."
So, you happen to be unlikely to ever come across a linear-regulated supply in a package this compact. If you require a very clean power input, you are going to need to have a bulkier, heavier, and far more expensive device, I'm afraid, and you'll trade "efficiency" (assume less wasted power) for the much less noisy signal that a linear regulated supply delivers.
I ordered 2 units for this item, delivered not on schedule time. Second- I got it, after I connected, my security cameras can only perform for a rather short time with quite blurry image. I checked it and connected my camera to the power provide once more. When my cam was plugged in, the camera was nonetheless in poor image good quality and the IR Leds had been not work at all this time, and then an acrid smell of burning electronics was emanating from my camera. This poor power supply ($6) cost me a superior camera. Stay away from poor power.
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