Right... by mistake I bought 2 7" monitors from eBay... one is for my carpc project but then I have a spare now... it runs on 12v but don't know how to calculate the mah or whatever it is for battery power life...
Is feasible to use it in a handheld?
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Using a 7" monitor in a portable console
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Shugs81
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Dreamcast Opening Information Finished! need to sort out formating...
Re: Using a 7
I'm using 7" HD monitor (headrest) in my universal WMI (wireless video interface. Think techknott's creations for PS3 and Xbox 360). I can tell you mine takes about 7Watts. This one does NOT have tv tuner or build in speakers.
I did a simple test where I connected 5 AA batteries to my monitor and it worked fine. (5 * 1.5V = 7.5V)
So if you get a polymer Li-Ion battery at 7.4v it should power your system fine.
There is a formula to figure out how big of a battery you need based on power usage:
( Ah) = Device's Wattage (W) x Time to run ( Hours) / Battery Voltage (V)
For example, if using a 12V battery pack, and run 10W DC device for 10 hours, you need choose a battery pack with capacity > 8.3Ah, e.g
( 10x10)/12 = 8.3
1000 mAh = Ah, higher mAh will provide longer running time.
Another useful formula is:
Power = Voltage * Current
I did a simple test where I connected 5 AA batteries to my monitor and it worked fine. (5 * 1.5V = 7.5V)
So if you get a polymer Li-Ion battery at 7.4v it should power your system fine.
There is a formula to figure out how big of a battery you need based on power usage:
( Ah) = Device's Wattage (W) x Time to run ( Hours) / Battery Voltage (V)
For example, if using a 12V battery pack, and run 10W DC device for 10 hours, you need choose a battery pack with capacity > 8.3Ah, e.g
( 10x10)/12 = 8.3
1000 mAh = Ah, higher mAh will provide longer running time.
Another useful formula is:
Power = Voltage * Current