Model: Freaduino AC UNO - Color: White + Black - Material: FR4 fiberglass - First Arduino development board which supports AC input - Inherits all of Arduino UNO's features - Compatible to Arduino UNO / Duemilanoves pin layout screw hole and dimensions - 3.3V or 5v Operating Voltage selectable - More visible location of Indicator LEDs - UART/IIC and SPI interface breakout - Evolved with SMD components - Micro-controller ATmega328 - Supply Voltage DC(recommended): 7-12V Supply Voltage AC(recommended): 5-9V Maximum supply voltage (not recommended): 20V - Digital I/O Pins 14 (of which 6 provide PWM output) - Analog Input Pins 6 - DC Current per I/O Pin 40 mA DC Current for 3.3V Pin 50 mA - Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader - SRAM 2 KB (ATmega328) EEPROM 1 KB (ATmega328) - Clock Speed 16 MHz - Comes with USB cable (12cm) - Great for Arduino DIY projects