Downlad Arduino Uno Pinout Schematic Datasheet (PDF)

arduino uno pinout datasheet pdf - The Arduino Uno is one of the most common and widely used Arduino processor boards.

There are a wide variety of shields (plug in boards adding functionality). It is relatively inexpensive (about $25 -$35).

Revision 2 added a pull-down resistor to the 8U2 HWB line, making it easier to put into DFU (Device Firmware Update) mode

Revision 3 added:

• SDA and SCL pins are now brought out to the header near the AREF pin (upper left on picture). SDA and SCL are for the I2C interface
• IOREF pin (middle lower on picture that allows shields to adapt to the voltage provided
• Another pin not connected reserved for future use

The board can be powered from the USB connector (usually up to 500ma for all electronics including shield), or from the2.1mm barrel jack using a separate power supply when you cannot connect the board to the PC’s USB port.

Arduino Uno pinout – Power Supply

There are 3 ways to power the Arduino Uno:

• Barrel Jack – The Barrel jack, or DC Power Jack can be used to power your Arduino board. The barrel jack is usually connected to a wall adapter. The board can be powered by 5-20 volts but the manufacturer recommends to keep it between 7-12volts. Above 12 volts, the regulators might overheat, and below 7 volts, might not suffice.
• VIN Pin – This pin is used to power the Arduino Uno board using an external power source. The voltage should be within the range mentioned above.
• USB cable – when connected to the computer, provides 5 volts at 500mA.

The Arduino Uno Microcontroller is one of the most versatile boards on the market today and that’s why we decided to focus on it in this guide.

This guide displays most of its capabilities, but there are also more advanced options which we did not go into in this post.

The important thing to know when you choose a board for your project is its capabilities and limitations. It’s also important to understand the different communication protocols that the board uses.

Arduino Tutorial: Overview of Arduino Pins

In this Arduino tutorial video we do a full overview of the pins of the Arduino Uno.
The Pinout of the Arduino Uno is important to know as you design programs and circuits to connect with it.

We discuss:

• Powering the Arduino Uno 
• USB Communication on the Arduino Uno (TX and RX) 
• PWM outputs 
• Digital Inputs and Outputs 
• Grounds and Power Pins of the Arduino 
• The function of Analog Input Pins on the Arduino Uno

You can Downlad Arduino Uno Pinout Schematic Datasheet (PDF) here.