The Arduino Uno is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
SPECIFICATIONS
| 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 (ATmega328) of which 0.5 KB used by bootloader | ||
| SRAM | 2 KB (ATmega328) | ||
| EEPROM | 1 KB (ATmega328) | ||
| Clock Speed | 16 MHz | ||































































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