Dot Matrix 8x8
above that pic, we can identifiy which one the coloums and rows (a,b,d,c,e,f,g,dotpoint) portD (atmega8) most scheme connected as rows meanwhile portB (in arduino call D8 .. D13) connected as coloums. need more 2 wire for coloums try use portC
and the question is how the code ?
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