Arduino UNO is a microcontroller board based on the ATmega328P. It has 14 digital input/output pins ( 6pins 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.
Technical Specifications
• Microcontroller - ATmega328P • Operating Voltage - 5V • Supply Voltage (recommended) - 7-12V • Maximum supply voltage (not recommended) - 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