This is a very old project of mine from 2014 ;)
It works by reflecting the buffer variable to the LEDs with Timer ISR at a specified frequency.
you can draw anything you want with set_pixel or set_screen_frame functions
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24 x 8 resolution...
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3 shift registers for full row... (79HC595)
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1 transistor array for driving leds... (ULN2003A)
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Contains various animations and sprites...
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Turkish font characters...
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Text scrolling feature...
Production circuit
Schematic circuit
Demo
