Thanks Gorgon, Do you recommend to use power transistors like TIP127 or TIP122?
The frame rate is high. I can't even identify the alphabets. The alphabets keep loading very rapidly like un second.
I have one more doubt. I use ULN2003 for sinking and not sourcing. Im soucing the 20mA of current for each LED in column from 74HC595 (shift register) via a 150ohm resistor. Since ULN2003 is used for sinking, whether these vales (500mA) is applicable for me?
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