Hi,I do it because i need a calculator for my girl friend (i'm preparing a gift for her :))Anyway, it's easy. I attached standart code for arduino 8x8 dot matrix 7219. Then you can create your text with my excel file and copy codes from the excel, paste to the arduino code editor. But then you have ...By: onderyilmaz
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from Instructables: exploring - technology - robots http://ift.tt/18VY5oD
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