I have a nview viewframe tft (the yellow one) It didnt come with a power adapter. I know it needs a 12v 2a adapter but i have a 12v 4a adapter. before i do anything will this blow the panel?
is the amprage too mutch? or will it work?
thx
is the amprage too mutch? or will it work?
thx
Hey I just got the same panel and the adapter that came with it was only 300mA which didn't work. I went to Wal-Mart and bought a universal 12V 1A which seems to work fine. I don't have a VGA cable for it yet so I haven't been able to fully test it, but when I plug it in the fans come on and I can see the splash screen.
power adapter
Even if a power adapter is rated for 12V 4A, it will deliver 12 volts at any current the device draws up to 4 A. (Some really cheap designs may not regulate very well if the device only draws say 1/10 the rated current, but it should not blow anything up.) So running a 12V 2A device on a 12V 4A power supply is fine. Just make sure you get the polarity right!
In a pinch, you can run any 12V device off your car battery, as long as the engine is not running. And a car battery can deliver hundreds of amps.
Ohm's law says: I = E/R
I = current in Amperes
E = electromotive force in Volts
R = resistance in Ohms
The device has a certain resistance (that probably changes as it does different stuff), so with a fixed 12 volts, you can see that the current changes to match E/R.
Even if a power adapter is rated for 12V 4A, it will deliver 12 volts at any current the device draws up to 4 A. (Some really cheap designs may not regulate very well if the device only draws say 1/10 the rated current, but it should not blow anything up.) So running a 12V 2A device on a 12V 4A power supply is fine. Just make sure you get the polarity right!
In a pinch, you can run any 12V device off your car battery, as long as the engine is not running. And a car battery can deliver hundreds of amps.
Ohm's law says: I = E/R
I = current in Amperes
E = electromotive force in Volts
R = resistance in Ohms
The device has a certain resistance (that probably changes as it does different stuff), so with a fixed 12 volts, you can see that the current changes to match E/R.
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