2278Uno R3 CH340G ATmega328p SMD Development Board is the low-cost version of the popular Uno R3 Arduino. It is assembled with the CH340 USB to Serial converter chip, instead of using an Atmega16U2 chip.

Specifications:-

• Microcontroller : ATmega328 SMD.
• Operating Voltage : 5V.
• Supply Voltage recommended :  7-12V DC.
• 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.