Arduino Uno R3 is a widely used circuit board in Arduino programming, Arduino Uno R3 is a compatible hardware with many types of Shiled Arduino comes along, making learning more flexible and less expensive than.

Technical Data

Control chipATmega328P
Operating voltage5V
Input voltage (recommended)7-12V
Input voltage (limited)6-20V
Number of digital pins14 (of which 6 provide PWM output)
Number of PWM Digital pins 6
Analog pin number 6
DC current on each I / O pin 20 mA
DC current on the 3.3V pin 50 mA
Flash Memory32 KB (ATmega328P) of which 0.5 KB used by bootloader
SRAM2 KB (ATmega328P)
EEPROM1 KB (ATmega328P)
Quartz speed16 MHz
Length68.6 mm
Width53.4 mm
Weight25 g

Shematic and board size