Board

Types of pins

0-13 - digital pins
~ - pWM (pulse-width modulation) pins
A0-A5 - analog pins
5V, 3.3V - power pins
GND - ground pins
RESET - reset pin
AREF - analog reference

Special pins

1 - TX - Transmitting
2 - RX - Receiving

Can be user to serial communications

13 - Onboard LED

Reset Button

Program is reset and it restarts.

Full description of the board can be found at this page https://www.tutorialspoint.com/arduino/arduino_board_description.htm.

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