The Uno R3 without Cable is a micro-controller board base on the ATmega328.It contains everything need to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started.
 
Specifications:
 
	
		
			
Analog I/O Pins
			
			
6
			
		
		
			
Clock Speed
			
			
16 MHz
			
		
		
			
Color
			
			
Blue
			
		
		
			
DC Current per I/O Pin
			
			
DC Current per I/O Pin: 40 mA ; DC Current for 3.3V Pin: 50 mA
			
		
		
			
Digital I/O Pins
			
			
14 (of which 6 provide PWM output)
			
		
		
			
EEPROM
			
			
1 KB (ATmega328)
			
		
		
			
Flash Memory
			
			
32 KB (ATmega328) of which 0.5 KB used by bootloader
			
		
		
			
Input Voltage(Recommended)
			
			
7-12V
			
		
		
			
Operating Voltage
			
			
5
			
		
		
			
PWM Output Pins
			
			
6
			
		
		
			
SRAM
			
			
2 KB (ATmega328)