Description:
The SainSmart Ethernet Shield for Arduino allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip. The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield. It is MEGA compatible and an on-board reset controller.
The SainSmart UNO R3 is our new 2013 improved version product. It's More Powerful than the original UNO R3, and now it has perfect quality and much more performance! In addition, the SainSmart Uno R3 now uses an ATMega16U2 instead of the ATMega8U2 chip. This allows for faster transfer rates and the ability to have the UNO show up as a keyboard, mouse, joystick, etc. No drivers needed for Linux or Mac (inf file for Windows is needed).

Features: 

SainSmart UNO R3 Improved Version :

SainSmart UNO R3 board is our new 2013 improved version product! It's 100% compatible with original UNO R3, now it has perfect quality and much more performance , we believe it will provide exciting use experience to you!

This is the new SainSmart Uno R3. In addition to all the features of the previous board, the Uno R3 now uses an ATMega16U2 instead of the ATMega8U2 chip. This allows for faster transfer rates, no drivers needed for Linux or Mac (inf file for Windows is needed), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc.

 Note: The SainSmart Uno R3 requires the Arduino drivers folder in order to install properly on some computers. We have tested and confirmed that the R3 can be programmed in older versions of the IDE. However, the first time using the R3 on a new computer, you will need to have Arduino installed on that machine.

 1.3.3V/5V Supply Voltage and IO Voltage can be switched at the same time.

2.More 3.3V modules supported, such as Xbee module, Bluetooth module, RF module, GPRS module, GPS module, LCD5110 Backlight and so on, but the original version can only support 5V IO.

3. Controller uses SMD MEGA328P-AU chip. Add A6/A7 port.

Parameter: UNO R3

5V Electric current: 500MA

3.3V Electric current: 50MA

Input Voltage: 7-12V

Improvement of R3

Working voltage 3.3V/5V is optional.

Description:
Digital I / O digital input / output of 0 to 13.
Analog I /O analog input / output of 0 to 7.
Support ISP downloads function.
Input voltage: no external power supply when connected to the computer USB, external power supply 5V ~ 9V DC voltage input.
Output voltage: 5V DC voltage output and 3.3V DC voltage output.

Arduino UNO R3 can only work at 5V voltage. When it comes to 3.3V Level module, IO can’t be connected to it. The Level should be changed, like the SD card, Bluetooth module and so on.

Sainsmart UNO R3 can work at not noly 5 voltage but also 3.3 voltage by switching on the button. At this time, IO port is 3.3V and it can work with 3.3V Level module. (R3 can directly use the electronic building blocks on I / O port and elicit G, V, S).It also has much more extensible Pins and another 2 Analog I/O Pins.

Ethernet Shield:

    For all version of arduino Main board,   2009 , UNO, mega 1280, mega 2560
    With this Ethernet Shield, your Arduino board can be used to connect to internet
    controller: w5100
    works as server or client
    comes with efficient library and examples
    direct plug puzzle board, NO soldering needed.

Package list:

• 1 x Ethernet Shield
• 1 x UNO R3
• 1 x USB Cable

Documents:

• Click to download the manual