A bunch of 7-segment displays. Can play movies.
Those days I was busy on other projects. Sorry for the late update!😂
And since I'm not a native English speaker, feel free to leave a comment, if there're any improper expressions or grammar mistakes. Thanks.❤
At first, I thought I could drive the array using 74HC595 for anode, and 74HC138 for cathode. But I was wrong. 74HC138's driving capacity is too low. So when there're many LEDs lit in one row, the row became really dim. Here's an example:
This is because of the weak driving capacity of cathode.Read more »