This diagram is for practice and programming, wants you have it working you can put transistors and resistors on. Here we put the letter A on the display as you can see in video, using a breadboard.
Let’s understand how it works. First connect row and column to the microcontroller PORT P3 and PORT P2 respectively. Then by using programing sends data to first column and at same time sends data to row and then after some milli-seconds change the column and send data to row again. And do this till last column and then repeat it again and again around speed of greater then 20 frame per second.