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Powering a 8 inch TFT from a laptop- Advice needed

post #1 of 4
Thread Starter 
Hi,

need a little help. Trying to use a smaller monitor on a netbook mod im doing, (building a gaming tablet from a HP Mini 311. Ive found a screen and controller board

http://www.ebay.com/itm/HDMI-VGA-2AV-Driver-board-8inch-1024-768-EJ080NA-04B-EJ080NA-04C-lcd-panel-/181035737391?ssPageName=ADME:X:RTQ:US:1123

They recommend 12v and 2A, but apparently it will work with 5~24v and anything over 1.5A is apparently good enough.

I'm very new to this stuff, so please excuse my ignorance, but is it possible to find a suitable power supply from the laptop anywhere?



My second possibly stupid question, is about how i connect the battery. Can i move the battery from its usual docking place, and run wires to it from the four prongs to the battery's new position?


Thankyou for any help and guidance anyone can give, and sorry for my lack of clue as to what to do here!

Jonny
post #2 of 4
Quote:
Originally Posted by jayjello View Post

but is it possible to find a suitable power supply from the laptop anywhere?
Might be able to pull that much current from the USB port, but you might not be able to power anything else form the USB then. Other place to get power is directly from the battery. Just tap off where it connects to the board. Other than that, there is no general purpose power circuitry on a motherboard, as everything thing else will have it's own vrms and will not be able to deliver the power you need.
Quote:
My second possibly stupid question, is about how i connect the battery. Can i move the battery from its usual docking place, and run wires to it from the four prongs to the battery's new position?
Don't see why not. You might hit a voltage drop issues if you wires are too small and too long though.
    
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post #3 of 4
Reading the specs it seems as though the monitor itself requires a 12v input so im not sure if 5v will be enough

Also that's too many amps for USB, you will prob end up blowing the IC

Just buy the recommended 12v power supply...
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post #4 of 4
Quote:
Originally Posted by just_nuke_em View Post

Might be able to pull that much current from the USB port, but you might not be able to power anything else form the USB then. Other place to get power is directly from the battery. Just tap off where it connects to the board. Other than that, there is no general purpose power circuitry on a motherboard, as everything thing else will have it's own vrms and will not be able to deliver the power you need.
Don't see why not. You might hit a voltage drop issues if you wires are too small and too long though.

Trying to pull >500mA off a laptop USB port is asking to blow something up.
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