ABC of Analog Signal

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What is an electrical signal? What is an analog signal? What are its characteristics? What is a potentiometer? How to visualize a signal on evive's mini oscilloscope?

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Digital Input – Reading the State of Switches

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What is digital input? How to read the state of a digital pin in PictoBlox? How to read the state (pressed or not) of evive tactile switch? How to read the state (up, down, or center) of evive's slide switch?

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