Large Display Numbers on 160x128 LCD

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i trying code 160x128 display golf cart show speed, trip distance, , battery charge level.

this rough (done in paint) example of trying display golf cart driver.


i know feasibility of making custom character library of digits big ones shown in '20.'  i starting doubt if can because seems library needed make custom numbers big fill entire space needed sketch.  please understand make claim out of slight ignorance.  i have not coded arduino, of yet, have done lot of research , looked @ libraries code t6963c controller included on lcd.

this course project @ university.  i have completed bs in electrical engineering, have experience in coding c , assembly.

any appreciated
thanks

display link
http://www.sparkfun.com/products/8799

edit: forgot include using arduino 2650

use program memory array, not fill memory.

also in place of using 1 bit per pixel compress data in way run time encoding.
this simpler sounds, have pairs of numbers 1 defines number of blank pixels followed number of set pixels.


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