Power Up display based on RA8875

Had to write this to respond at many questions about possible issues that at the end non exists!
The RA8875 it's capable to drive large displays but the 800x480 7" (expecially) uses large background that uses a LOT of current!
If you plan to use such a large display the best thing you can do it's provide it's own supply an NOT use your Arduino or (worst) Arduino+usb to supply the RA8875 based board because in the best case you will work in a dangerous zone, remember that I'm forcing the RA8875 to use it's best at the initialization so the background led uses more current with my library than adafruit (just during initialization), this can force a voltage drop from your Arduino or worst a failure of your USB due eccessive current. These drops can be so fast that mostly of the times are ignored by computer and arduino MCU but the RA8875 regulator doesn't have the ability to stabilyze at 3V3 as the RA8875 needs and the chip doesn't be able to startup correctly, cause a grey screen or just black in worst cases.