New version of UNO R3-more analog pins. Add A6, A7. UNO R3 Ch340g / ATmega328 Arduino Compatible with UNO R3 board. Built in Atmel ATmega328 microcontroller and USB-UART chip CH340G interface. Board for Arduino board similar to the one (ATmega 28) functionality. This is a budget, but the same block, and uses the original chips ATMEL Atmega328 (16 MHz). CH340G board the chip is used as a UART-USB converter. CH340G-chip solution is a budget. When you are working at the frequency of 12 MHz, giving a stable result data exchange (need to install the drivers to the computer). UNO R3 ch340g / ATmega328 He connects to the computer via the microUSB cable (used for almost all smartphones and android). You can supply power on board through a microUSB or XH connector socket (XH connector cable included). The voltage regulator (LDO) can cope with input voltage of 6 V to 12 V DC. Output current 5 V-On 800mA to 180mA 3.3 V-on (note that most lower input voltage is the outgoing current). Which will provide a more reliable energy project initially.