2.2.4 Arduino Input and Output Pins
The Arduino Uno has 14 digital input/output pins and six analog input pins
(shown in fig 2.4) The architecture of the Arduino board exposes these pins so
they can be easily connected to external circuits. Arduino pins can be set up
in two modes: input and output.the
ATmega pins are set to input by default, so we don’t need to explicitly
set any pins as inputs in Arduino, although we will often do this in our
code for clarity.
The Arduino Uno has 14 digital input/output pins and six analog input pins
(shown in fig 2.4) The architecture of the Arduino board exposes these pins so
they can be easily connected to external circuits. Arduino pins can be set up
in two modes: input and output.the
ATmega pins are set to input by default, so we don’t need to explicitly
set any pins as inputs in Arduino, although we will often do this in our
code for clarity.
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