The symbol LED_BUILTIN is supposed to be a macro not a const int This was discussed at length on the Arduino developers mailing list years ago and final conclusion is that it must be a macro. The r ...

Arduino library that allows various Arduino boards to appear as a Joystick or Gamepad. The following devices should be compatible, but only the Arduino Zero has been tested by me: Arduino AVR Boards ...

Drive the gate of the FET with an op-amp that maintains either constant current or constant voltage. Control everything with a DAC, and you have a programmable load controlled by an Arduino.

Some projects are both educational and useful. We believe that [Jasper’s] Arduino based electronic load is one of those project. [Jasper’s] electronic load can not only act as a constant ...