Arduino UNO CH340G (Clone to Arduino UNO R3)
Arduino Uno R3 is the clone one of the latest version of Arduino Uno with an onboard CH340G USB-serial converter chip. Even there are some little differences respect to original one, it is almost the same in terms of usage and software. This provides you 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 their package. The original one has a DIP package but the clone one has SMD package microcontroller.
Despite being a clone one, there is a pin group (4x GND, 2x 5 V, 2x 3.3 V, 1x RX/TX, 1x SCL/SDA) near to the crystal oscillator and there are external pin holes allow you to solder male headers on the board too.CH340G USB driver needs a special driver.
The main difference of this board is having 12 - extra pin holes on-board. These pins are RX/TX, SCL/SDA, 3.3V / 5 V, and ground pins that are not found enough on the original board. You may use these pins by soldering external male or female headers.
On the latest clone boards of Arduino, the USB CH340G serial converter has been used instead of standard 16u2 or FTDI chip on the original UNO.
Operating voltage: 5V
Input voltage (recommended): 7-9 V
Digital I / O Pin 14 (6 of them provide PWM output)
PWM Digital I / O Pins: 6
Analog Input Pin: 6
DC current per I / O Pin: 20 mA
3.3V Pin DC current: 50mA
Flash Memory 32 KB (ATmega328P) which is used by the 0.5 KB bootloader
SRAM: 2 KB (ATmega328P)
EEPROM: 1 KB (ATmega328P)
Clock Speed: 16 MHz
Size: 68.6 mm x 53.4 mm