Airplane Project, A Beginner, and Displays

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hello all, beginner arduino , need community guidance.  have aspirations build crew alerting , warning system experimental aircraft.  summarize, comprise series of microswitches, thermocouples, variable resistors , radar altimeters provide pilot variety of text messages , audible alerts utilizing series of conditional statements arduino sketch.  i'm making way through conditional code have no idea start display messages.  understand basic said, beginner.  constraints have able vary text size , color , display on black background.  graphics plus not necessary.  perhaps touch option down road beyond ability now. 

i have found seems information , need advice on start.  literature should beginner read better understand how arduino utilizes lcd , led screes display text?  need screen @ least 5" , again, color.  economical voice?

thanks in advance assistance may provide

a 5" screen ambitious arduino. (i've ordered 1 similar project, adafruit.) problem arduino needs send multiple serial commands screen update every single pixel. fast spi, limited updating few thousand pixels per second, fewer. 800x480 screen has 38,400 pixels , if program ever needs update entire screen in 1 go, take many seconds clear screen black.

a rasberry pi might better tool screen size.


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