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Velleman PSSMV1USA 3-12Vdc Switching Power Supply
|Price:||$12.99 & FREE Shipping|
Specifications for this item
|UPC||836479003835 , 836479003811 , 789164072107 , 642008689612|
|EAN||0642008689612 , 0836479003811 , 0836479003835 , 0789164072107|
|Number of Items||1|
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Get rid of those bulky power-hungry heat-producing mains adapters.
These adaptors use state-of-the-art switching power supplies and feature some major advantages such as:
- cooler running
- stabilized output
- short-circuit and overload protection
- compact design
- very low idling consumption
- supply voltage: 100 ~ 230V AC 15%
- power: 10W
- efficiency: > 80%
- output voltages: 3, 4.5, 6, 7.5, 9, 12V DC
- output current: 800mA (regulated) / 1.5A max.
- plugs: 2.5mm mono, 3.5mm mono, 1.0x3.0mm, 1.35x3.5mm, 1.7x4.0mm, 2.1x5.0mm, 2.5x5.5mm, 1.5x5.5mm
- dimensions: 2.6" x 1.1" x 2.9"
- weight: 3.0 oz
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I am extremely satisfied, this power supply is far superior to any OEM supply because it is electronically regulated: the voltage you set is actually the voltage you get (some OEM power supplies have outputs up to 70% higher than the intended voltage).
Also, this power supply does not heat up (again, because it is electronically regulated), and therefore less likely to overheat and fail.
One word of advice, though: I recommend putting some tape over the voltage selector in order to avoid any accidental voltage switching, which can be deadly for the equipment connected to the power supply.
Detailed description of determining polarity:
First, examine the socket on your appliance. It has a center spike that will receive either positive current or negative current from the power supply. Your appliance should have a diagram (often small and subtle) near the socket, that tells the end user whether the center spike should receive positive or negative current.. Search Wikipedia using the term "Polarity symbols" for explanation of the diagram on your appliance. This will tell you how to figure out the polarity of the center spike.
After figuring out the polarity of the center spike, examine the plug that goes into the socket of the appliance. That plug comes in two parts. One is a removable adapter (call it part A) that is stamped "CEN" on one side. The other part (call it part B) is attached to the cord from the power supply. One side of part B has a plus sign, and the other side has a minus sign. If you align the CEN side of part A with the positive sign on part B, you supply the center spike on the appliance socket with positive current. And if you align CEN with the minus sign on part B, the center spike on the appliance socket receives negative current.
This power supply is so handy to have around because it's so versatile!
* Very easy to select different dc voltages.
* Comes with a good variety of adapter plugs. The pack of plugs can be easily attached to the cable using the cable's twist-tie so they're not lost.
* Nice design that allows you to configure the polarity (+/-) of the plug to meet the need of your device. Basically each adapter plug is labeled to indicate which way to use it.
* I've noticed some line noise with this power supply. Most devices will have no issue. However, I have a particular scenario with an fm radio having a hum sound coming from the radio's speakers when this is power supply is plugged into the same outlet. I'm not fully sure it's an issue with the power supply or if it's an issue with the fm radio; but the hum sound only occurs when this power supply is used on the same outlet.
This is a great item to have on hand in any household.