Microcontroller ATmega328 Operating voltage 5V Input voltage (recommended) 7-12V Input voltage (limits) 6-20V 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 of which 0.5 KB used by bootloader SRAM 2 KB EEPROM 1 KB Clock speed 16 MHz


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