ANALOG VS DIGITAL

Digital Electronics: 1) Digital versus Analog signals: billkleitz 

from :48 to 4:05, or more if you are interested.

beware of some British spellings (analogue) and a few typos)

Physics-Waves-Analogue and Digital Signals: expertmathtutor

Analog and Digital:  Explain that Stuff!

Analog and digital:  Math is Fun

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