Logic Levels: Arduino Course 4.1

The video tutorial discusses logic levels in Arduino, using an analogy of Caesar's protocol to explain digital communication. It covers how high and low voltages represent binary values, and how these are applied in Arduino pins set as inputs and outputs. The tutorial also explains the importance of agreed protocols in communication and the undefined states in voltage levels. It concludes with a brief overview of logic levels in hardware communication and a preview of upcoming lessons.

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