[Kaushlesh Chandel] prototyped a few projects on his Arduino that use an HD44780 Character LCD. Wanting to keep these projects in one piece, but not sacrifice his Arduino board, so he etched his own ...

Arduino 3D Printer project is a DIY 3D printer design based on an arduino board. It features RAMPS 1.4 shield and Arduino Mega 2560 that handles majority of the 3D printer components. It has an ...

(**) speaker pin 2 output is connected to speaker pin 1 on DevKit hardware. To prevent the IO pins from possible damage, speaker pin 2 should NOT be configured as an output. (****) When using serial ...

(****) When using serial flash with the Pro Micro standard wiring, OLED_CS (chip select) cannot be grounded (always active). In this case a simple circuit with a general purpose PNP transistor and two ...