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Is there any difference btween just 12v and 12v 1A

  1. #1
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    Default Is there any difference btween just 12v and 12v 1A

    I have a Netgear DG843G v4 DSL router. Because the adapter was made for UK plugs, it frequently reboots. When I asked Netgear to give me an adapter made for Indian plugs, they gave me an adapter with a heavier transformer. But it still did not stop the reboot problem. My dealer suggested me that I should get an AT SMPS converted into a 12v adapter. I got one and it worked perfectly well. But after few weeks the router stopped working (the power LED doesn't turn on). The Netgear adapters are 12v 1A. The SMPS yellow wire is just 12v. Is there any difference between 12v and 12v 1A.
    I referred ABOUT SMPS AND TROUBLESHOOTING - NANDA GOPAN to get information about the SMPS.

  2. #2
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    for difference about Voltage current
    Basic Electricity

    You can buy a AC to DC adapter rated at 12 V =DC 1AMP
    or you can up grade to primary230V AC~ to
    secondary12 V=DC at 1.5 Amps
    Cost will be more and ensure the DC plug
    is OF correct polarity ( Marked usually as
    INNER + OR TiP +VE)
    Attachment 6439

    Attachment 6440
    Last edited by essbebe; 19th February 2010 at 06:05 PM.

  3. #3
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    So there is difference between 12v and 12v 1AMP, right?

  4. #4
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    So there is difference between 12v and 12v 1AMP, right?
    I am not sure !!!!!!!
    please refer the link given earlier.
    Let's use a water tank and a pipe as an example.

    In some neighborhoods you'll see a water tank raised high above the ground on strong legs. The water in this tank has been raised up there to give it pressure. A series of pipes carry the water down from the tank, under ground, into your house, and then to each sink, bathtub, and toilet. The water in your pipes is under pressure because the water in the tank is pushing down on it. This pressure is similar to Voltage. Voltage is the pressure pushing on the electrons in a circuit.

    If all of the faucets in your house are closed, no water flows through the pipes. If you open one faucet, some water flows. If you open all of the faucets, a lot of water flows. This flow of water is similar to electrical Current. Current is the flow rate of electrons through the circuit.


    Are Voltage and Current Related?
    Voltage and current are not the same thing, although they are closely related. In simple terms, Voltage causes Current. Given a Voltage and a path for the electrons, current will flow. Given the path, but no Voltage, or Voltage without the path, there will be no current.
    Last edited by essbebe; 17th November 2009 at 08:38 AM.

  5. #5
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    12V as such means nothing........ every adapter will have a current and a voltage rating.....
    it is the power that matters, not current or voltage alone......
    for eg, 12V, 1A means power = 12 * 1 = 12 W
    my ut300r2u modem has the rating 10V dc output at 500mA, which obviously means it gives a 5W output..........
    the modem can get spoilt if the power rating is not correct....... that is what might have happened in your case..........

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