Arduino Uno R3 Pin Diagram. Also notice that the atmega pins for each arduino pin are also provided in the diagram above. Other arduino uno r3 parts input and output each of the 14 digital pins on the uno can be used as an input or output using pinmode digitalwrite and digitalread functions.
Here the switch is connected to digital pin 4 d4 and led is connected to digital pin 8 d8 of arduino uno. I will explain the description of the arduino uno pins and the board in the post. Arduino uno pinout digital pins.
Along with atmega328p it consists other components such as crystal oscillator serial communication voltage regulator etc.
Arduino uno is a microcontroller board based on 8 bit atmega328p microcontroller. Along with atmega328p it consists other components such as crystal oscillator serial communication voltage regulator etc. Arduino uno rev3 schematic diagram. He hits a lot of the important points here and in addition he explains the limits of all the pins and.
