Description Arduino is a microcontroller Development Board with ATmega328p Microcontroller. The required minimum voltage is 5v. having 14 Digital GPIO pins and 6 analog pins. 5v and 3.3v power pins with 3 ground pins onboard. Another SMD microcontroller inbuilt for boot the Arduino main chip. there is also two voltage regulator one is for 5v and another is for 3.3v. for SPI protocol there is MISO, MOSI, SCK, and SS pin which is pin 12, pin 11, pin 13 and pin 10 respectively. for I2C protocol there are SCL and SDA pins above the pin 13 & Vref. serial communication by the pin Rx & Tx Which are given at pin 1 & pin 2. There are also some PWM pins on the board you can see all the detail in the given diagram.
