This is improved Arduino Uno R3 is one of the latest versions of Arduino Uno with an onboard CH340 USB - serial converter chip. Arduino UNOR3 provides you with a cheaper opportunity to get started with Arduino boards. The microcontroller model of this board is the same as the original one (Atmega328). The only difference between microcontrollers is the package. The original one has a DIP package but the clone one has an SMD package microcontroller. Arduino Uno r3 kit is more powerful as compared to the dip version.
