Thanks , I started with 8x8 dot matrix , rows and coloms, common cathode and common anode,
I connect those anodes to shift register 595 coloms, and those cathodes through transistors inverter circuit common
emmitter , to another shift register 595 for rows , and connected to arduino uno through data , clock , latches ,
I downloaded one 8x8 led matrix source code from site or friends , it worked perfectly ,
now I want to display same on 16x16 led matrix , I have no any source code yet , please help.
