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Why does the program size increase so drastically with these switch-cases?

EDIT: The problem is my op-code catch is op >= 0x20 || op <= 0x2F rather than op >= 0x20 && op <= 0x2F and so most of the switch-case was being optimised away! This is a really ...
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How to read code from Arduino Uno to Arduino IDE? [duplicate]

we can upload a code into Arduino UNO from our computers, but how about reading code? Can we read and get C codes from compiled codes from Arduino hardwares? My second question is that will we read ...
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Sweep with two shift registers

I am working with 8 dual color LED's and 2 shift registers. My connections are in place. But I do not understand how to work with 2 shift registers. So I am trying to make this: turn the first led on,...