Arduino UNO R3 SMD

Arduino Uno is a microcontroller board based on the ATmega328P (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.. You can tinker with your UNO without worring too much about doing something wrong, worst case scenario you can replace the chip for a few dollars and start over again.
Microcontroller 		ATmega328 SMD
Operating Voltage 		5V
Input Voltage (recommended) 	7-12V
Input Voltage (limit)	 	6-20V
Digital I/O Pins 		14 (of which 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) of which 0.5 KB used by bootloader
SRAM 			2 KB (ATmega328P)
EEPROM 		1 KB (ATmega328P)
Clock Speed 		16 MHz
LED_BUILTIN 		13
Length 	68.6 mm
Width 	53.4 mm
Weight 	25 g

For More Details on PC Click here

For More Details on Portables Click here.