Skip to main content
Arduino Help Center Help Center home page
Sign in
  1. Arduino Help Center
  2. Hardware Support
  3. Core Boards

Core Boards

  • Burn the bootloader on UNO, Mega, and classic Nano using another Arduino
  • If Arduino UNO or Mega 2560 is not recognized by the computer
  • Set a board to DFU mode
  • Flash USB-to-serial firmware in DFU mode
  • I can't upload sketches to my Arduino 101 board
  • What is the difference between Arduino UNO SMD and the standard UNO
  • The Diecimila takes a long time to start the sketch
  • My sketch does not start when powering the board with an external power supply (Arduino Diecimila or earlier)

Didn’t find what you were looking for?

Contact Us

Do you have a particular request? Haven’t found what you were looking for in the articles we suggested? No worries, email us and we’ll answer as soon as possible.

Ask the Community

If you need a hand picking up the appropriate board for your next creation or just need help with a project, head over Discord to ask the community.

Project Hub

Get inspired by a variety of tutorials, Getting Started guides, showcases and pro tips. Contribute with projects, comment tutorials and ‘Respect’ the ones you like.

Arduino Help Center