If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects,… ...

FontShrink.cpp Stephen Fried, November 2016 Reduce the size of an Arduino custom font by only including the characters you need in the header file. This program will parse through the information ...

If you have an Arduino and a small 16x2 character LCD you can use this code to create a primitive oscilloscope.