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.
Buyer Evaluations
I've designed my personal "residence entertainment center" ventilation process, using a 200mm silent high-flow-volume fan intended for computer system use. The 200mm fan, mounted on rubber isolation mounts in front of a hole in the back of my stereo cabinet, efficiently eliminates the tendency of my stereo cabinet (and the components inside of it, certainly) to get hot throughout use. But I essential a way to power it. The fan has a standard "three-pin fan connector" as commonly discovered inside of PCs (ordinarily discovered on the motherboard itself). I necessary 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 one of the three pins, the one particular though would generally be used for tachometer signals, unpopulated). I put a tiny in-line switch into the circuit among these two connectors (a thermally-controlled switch could have been utilized as well, had I selected to, though most of those require an extra 5V line input for their electronics, which would have produced this device, with just 12V+ and ground lines, unsuitable).
I'm sure that if you have any other device which doesn't require a especially "clean" power supply, this is ideal. As the other critique tends to make clear, this is a switch-regulated power provide, not a linear-regulated power provide. (There is no such feel as a "normal" regulated power supply!)
If you don't know the distinction, read this:
"A switched-mode power provide (switching-mode power supply, SMPS, or merely switcher) is an electronic power supply that incorporates a switching regulator in order to be highly effective in the conversion of electrical power. Like other varieties of power supplies, an SMPS transfers power from a source like the electrical power grid to a load (e.g., a private personal computer) though converting voltage and existing characteristics. An SMPS is typically employed to effectively present a regulated output voltage, commonly at a level distinctive from the input voltage.
"As opposed to a linear power provide, the pass transistor of a switching mode provide switches fairly speedily (generally among 50 kHz and 1 MHz) amongst complete-on and complete-off states, which minimizes wasted energy. Voltage regulation is offered by varying the ratio of on to off time. In contrast, a linear power provide should dissipate the excess voltage to regulate the output. This greater efficiency is the chief benefit of a switch-mode power supply.
"Switching regulators are used as replacements for the linear regulators when greater efficiency, smaller sized size or lighter weight are required. They are, nonetheless, additional complex, their switching currents can trigger electrical noise issues if not very carefully suppressed, and straightforward designs can have a poor power factor."
So, you happen to be unlikely to ever find a linear-regulated provide in a package this compact. If you want a extremely clean power input, you will have to have a bulkier, heavier, and much more high priced device, I am afraid, and you'll trade "efficiency" (feel much less wasted power) for the less noisy signal that a linear regulated supply provides.
I ordered 2 units for this item, delivered not on schedule time. Second- I got it, just after I connected, my security cameras can only operate for a pretty brief time with fairly blurry image. I checked it and connected my camera to the power supply once more. When my cam was plugged in, the camera was nonetheless in poor image quality and the IR Leds had been not function at all this time, and then an acrid smell of burning electronics was emanating from my camera. This poor power supply ($6) price me a beneficial camera. Remain away from poor power.
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