 Microcontroller Atmel ATmega168 or ATmega328
 Operating Voltage (logic level) 5 V
 Input Voltage (recommended) 7-12 V
 Input Voltage (limits) 6-20 V
 Digital I/O Pins 14 (of which 6 provide PWM output)
 Analog Input Pins 8
 DC Current per I/O Pin 40 mA
 Flash Memory 16 KB (ATmega168) or 32 KB (ATmega328) of which 2 KB used by bootloader
 SRAM 1 KB (ATmega168) or 2 KB (ATmega328)
 EEPROM 512 bytes (ATmega168) or 1 KB (ATmega328)
 Clock Speed 16 MHz
 Dimensions 0.73" x 1.70