Features: Microcontroller: ATmega168 Power Supply: 3.35 -12 V (3.3V model) or 5 – 12 V (5V model) Operating Voltage: 3.3V (3.3V model) or 5V (5V model) Digital I/O Pins: 14 PWM Pins: 6 UART: 1 SPI: 1 I2C: 1 Analog Input Pins: 6 External Interrupts: 2 DC Current per I/O Pin: 40 mA Flash Memory: 16KB of which 2 KB used by bootloader SRAM: 1 KB EEPROM: 512 bytes Clock Speed: 16 MHz
