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 Evaluations
I've developed my personal "property entertainment center" ventilation program, employing 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, properly eliminates the tendency of my stereo cabinet (and the components inside of it, clearly) to get hot through use. But I essential a way to power it. The fan has a standard "3-pin fan connector" as generally discovered inside of PCs (commonly found on the motherboard itself). I necessary a 12V power provide 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 a single of the 3 pins, the 1 whilst would ordinarily be utilized for tachometer signals, unpopulated). I put a smaller in-line switch into the circuit among these two connectors (a thermally-controlled switch could have been utilized as well, had I chosen to, though most of those need an extra 5V line input for their electronics, which would have produced this device, with just 12V+ and ground lines, unsuitable).
I am positive that if you have any other device which doesn't require a incredibly "clean" power provide, this is perfect. As the other evaluation makes clear, this is a switch-regulated power provide, not a linear-regulated power provide. (There is no such feel as a "standard" regulated power provide!)
If you don't know the distinction, read this:
"A switched-mode power provide (switching-mode power supply, SMPS, or simply switcher) is an electronic power supply that incorporates a switching regulator in order to be very efficient in the conversion of electrical power. Like other sorts of power supplies, an SMPS transfers power from a supply like the electrical power grid to a load (e.g., a individual pc) while converting voltage and current characteristics. An SMPS is quite often employed to efficiently present a regulated output voltage, ordinarily at a level several from the input voltage.
"As opposed to a linear power provide, the pass transistor of a switching mode provide switches rather speedily (normally between 50 kHz and 1 MHz) among full-on and full-off states, which minimizes wasted power. Voltage regulation is provided by varying the ratio of on to off time. In contrast, a linear power provide must dissipate the excess voltage to regulate the output. This higher efficiency is the chief benefit of a switch-mode power provide.
"Switching regulators are utilised as replacements for the linear regulators when higher efficiency, smaller size or lighter weight are required. They are, then again, extra complicated, their switching currents can lead to electrical noise challenges if not cautiously suppressed, and hassle-free designs may possibly have a poor power aspect."
So, you're unlikely to ever discover a linear-regulated provide in a package this compact. If you have to have a fairly clean power input, you will have to have a bulkier, heavier, and extra high priced device, I'm afraid, and you are going to trade "efficiency" (believe less wasted power) for the much less noisy signal that a linear regulated provide provides.
I ordered two units for this item, delivered not on schedule time. Second- I got it, following I connected, my security cameras can only function for a fairly brief time with pretty blurry image. I checked it and connected my camera to the power provide once again. When my cam was plugged in, the camera was still in poor image top quality and the IR Leds had been not perform 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 great camera. Stay away from poor power.
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