1At last, a manual that explains everything that you need to know about the Arduino Uno hardware. This manual provides up-to-date hardware information for the popular Arduino Uno, the easy to use open-source electronics platform used by hobbyists, makers, hackers, experimenters, educators and professionals.

Get all the information that you need on the hardware and firmware found on Arduino Uno boards in this handy reference and user guide. Ideal for the workbench or desktop.

• This manual contains all of the Arduino Uno hardware information in one place and covers Arduino / Genuino Uno revision 3 (R3 or REV3) and earlier boards.
• Easily find hardware technical specifications with explanations and use the pin reference chapter with interfacing examples when building Arduino Uno projects or designing a shield.
• Diagrams and illustration provide easy reference to alternate pin functions and hardware connections.
• Learn to back up and restore firmware on the ATmega328P and ATmega16U2 microcontrollers on the Arduino Uno board, or load new firmware.
• Basic fault finding and repair procedures show how to test a new Arduino Uno or repair a faulty one.
• Power supply circuits are simplified and explained.
• Mechanical dimensions are split into five easy to reference diagrams.
• Find the circuit diagram or schematic in this book, as well as a parts list and a board layout reference to easily locate components on an Arduino Uno board.