These files are for Arduino projects. These files are free to use and modify without restrictions. If you use them as part of a teaching project, just cite me as a contributing author.
08/13/2018 - All projects using the MAX7219 module have been moved to the branch Projects-for-MAX7219.
09/20/2018 - All projects using the 2004A 20x4 character LCD display with the I2C backpack have been moved to the branch Projects-for-2004A.