Introduction to Arduino Uno


Arduino Uno

 Aduino Uno Board


Arduino Uno board is a very popular microcontroller( ATmega328P ) based board with 14 digital input and output pins, 6 analog inputs, onboard 16 MHz quartz crystal oscillator , a USB interface, a 5Volt power jack, header pins and a reset button. It can be powered by simply connecting to a computer with a USB cable or by using standard 5V AC to DC standard adapter. Microcontroller ATmega328P itself is replaceable as it comes on a DIP socket. Arduino Uno board can be easily programmed with Arduino IDE.

ATmega328P Specifications

Microcontroller ATmega328P
Operating Volt 5V
Input Voltage 7V-12V
Input Voltage (limits) 6-20V
Digital I/O Pins 14 (6 provide PWM output)
PWM Digital I/O Pins 6
Analog Input Pins 6
DC Current per I/O Pin 20 mA
DC Current for 3.3V Pin 50 mA
Flash Memory 32 KB (ATmega328P) ,0.5 KB used by bootloader
SRAM 2 KB (ATmega328P)
EEPROM 1 KB (ATmega328P)
Clock Speed 16 MHz
Length 68.6 mm
Width 53.4 mm
Weight 25 g


Arduino Uno Board Schematic


Arduino Uno Schematic

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