Arduino nano ATMEGA328P

Specifications:

• MCU: ATmega328
• Operating Voltage (logic level): 5V
• Input Voltage (recommended): 7-12V
• 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:  32 KB (ATmega328) of which 2 KB used by bootloader
• SRAM: 2 KB (ATmega328)
• EEPROM: 1 KB (ATmega328)
• Clock Speed: 16 MHz
• Dimensions: 0.73 x 1.70