3X Atmega328P-PU 

    Microcontroller

                         Atmega 328P

·       Program Memory Size: 32KB

·       EEPROM: 1K bytes

·       SRAM: 2K bytes

·       VDC: 1.8V to 5.5V

·       No. of I/O's: 23

·       No. of Pins: 28

·       MCU Case Style: DIP

·       CPU Speed: 20MHz C

·       Two 8-bit timer/counters with separate prescaler and compare mode

·       One 16-bit timer/counter with separate prescaler, compare mode and capture mode

·       Real Time Clock with separate oscillator

·       Six PWM channels

·       On-chip analog comparator

·       6-channel 10-bit ADC

·       Programmable Serial USART

·       Master/Slave SPI interface

·       I²C compatible 2-wire serial interface

Note: No modifications were made to the IC's, hence without Arduino Bootloader.