Six new features of Arduino Uno R3

In Italian,the word "Uno" means one.It was named to remember the creation of Arduino 1.0.Now for most people who have interest in the Arduino Uno R3 projects,Arduino UNO R3 is the most advanced board in the Arduino world.
The Arduino Uno R3 board has six new features:

1.0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible with both the board that uses the AVR, which operates with 5V and with the Arduino Due that operates with 3.3V. The second one is a not connected pin, that is reserved for future purposes.
Stronger RESET circuit.
The Arduino Uno R2 has an ATMEGA8U2 USB microcontroller on board while the Arduino Uno R3 development board has an ATMEGA16U2 on it.It's more advanced than R2.
The arduino uno R3 board adds a diode across the USB ATMEGA reset pin pull-up resistor.

The USB Chip Position is different.On the Arduino Uno R2 board, the ATMEGA8U2 is positioned at 45 degrees. This is changed back to square position on the R3 board.
The Arduino Uno R2 has a LED and resistor connected in series on Arduino pin 13. The Arduino Uno R3 board protect this LED/resistor through a unity gain op-amp. This is the spare op-amp that was unused on previous boards.

Here are how to show you Raspberry Pi on the television

Long long ago,the comeputers have no monitors to display systems and applications.So for lots of people,they prefer to using their televisions rather than paying for a extra monitor.

In recent years,however,this phonomenon has not changed so much,because the PC model of a dedicated monitor was eventually widely adopted with the development of technology.You know,we can use the mq131 arduino to probe the atmospheric environment today.So nothing is impossible.


Generally speaking,connecting to different kinds display is not a easy project.The Raspberry Pi developers must think about how their users might use the computer.Fortunately,the Raspberry Pi(even though most of them have Raspberry Pi touchscreen) supports three methods of visual output, enough to cover pretty much any domestic display unit.Here I want to teach three ways to connect you Raspberry Pi to televisions.

The first way is to use the HDMI

Equipped with a HDMI connector is the most important thing about the Raspberry Pi.That means anyone can connect the device to their living room television with an inexpensive cable.
However,it's a pity that not all televisions and monitors have HDMI connectors.So if this way doesn't work,we also have plan B：

It's a very smart choice to use a HDMI To VGA Adaptor if your display doesn't have a VGA connector.If your monitor is VGA-compatible, then all you will need is a HDMI to VGA adaptor in order to use your Raspberry Pi with that device or cable type.
If the two ways above can not solve your problem,we have the last,but not least one.The answer is RCA connector.You can connect your Raspberry Pi to any compatible TV or monitor with a standard RCA cable.