It is an 8 bit microcontroller with 32KB of flash, 2KB of SRAM, 1KB of EEPROM, timers, ADC, I2C, SPI, and UART peripherals. This board is designed around the ATmega328 AVR microcontroller.
Examples of some of the most popular Arduino Hardware boards are – Arduino Uno It comprises of Hardware boards and Software tools. Arduino is an Open Source embedded development platform which is easy-to-use.