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Technical Specs: MicrocontrollerATmega328P Operating Voltage5V Input Voltage (recommended)7-12V Input Voltage (limit)6-20V Digital I/O Pins14 (of which 6 provide PWM output) PWM Digital I/O Pins6 Analog Input Pins6 DC Current per I/O Pin20 mA DC Current for 3.3V Pin50 mA Flash Memory32 KB (ATmega328P) of which 0.5 KB used by bootloader SRAM2 KB (ATmega328P) EEPROM1 KB (ATmega328P) Clock Speed16 MHz Length68.6 mm Width53.4 mm Weight25 g