CosmoX AR1 is a development board inspired by Arduino UNO. It employs the 8‑bit ATmega168PB‑AU microcontroller (AVR architecture) running at up to 20 MHz and offers complete communication interfaces (SPI, I²C, and UART/USART). The MCU features 16 KB of Flash, 1 KB of SRAM, and 512 bytes of EEPROM—adequate for educational uses and prototyping.

The microcontroller operates from 1.8 V to 5.5 V. On‑board linear regulators generate fixed 5 V and 3.3 V rails from either the USB port or an external supply.

Thanks to its standard form factor, the board exposes 14 digital pins—six with PWM capability—and six analog inputs. These remain at the same headers found on traditional UNO boards, allowing the use of existing shields. CosmoX AR1 further adds a USB‑C connector for programming/power and a barrel jack for external voltages.

Technical Specifications

Feature * Description* Microcontroller Microchip ATmega168PB‑AU (8‑bit AVR) Clock Frequency 16 MHz crystal for precise timing Program Memory 16 KB Flash, rewritable Data Memory 1 KB SRAM · 512 B EEPROM Analog Inputs 6 × 10‑bit ADC inputs (A0–A5); MCU provides 8 channels Digital I/O 14 lines; D3, D5, D6, D9, D10, D11 support PWM PWM Channels 6 integrated PWM channels Comms Interfaces 1 × I²C · 1 × SPI · 1 × UART/USART Operating Voltages 5 V / 1 A & 3.3 V / 1 A regulators; MCU accepts 1.8 V–5.5 V Power Inputs USB‑C (power & programming) · 2.1 mm barrel jack for 7–12 V DC (survives up to ~18 V) USB‑Serial IC FT231XS‑R, onboard Connector Layout Female headers in Arduino UNO footprint for power, digital, and analog signals Board Dimensions ≈ 69 mm × 53 mm · height 13 mm (components included)