The PCB must be mounted floated, otherwise key presses don't work reliable. Connect pins 3 and 4 on connector P1 for 16-pin button mode. Smaller keypads with less pins may work, but are not tested.

Abstract: Linear complementary dual (LCD) codes and self-orthogonal codes have attracted wide attention in recent years for some practical applications. Hence, in this letter, we use simplicial ...

This is a RELEASE build of oipoi. oipoi is a DIY osu! keypad built using an Arduino Uno and a Python-based USB keyboard (HID) emulator. The Arduino reads button inputs and sends them over Serial. A ...

Abstract: In this paper, we analyze the working principle of an arduino. These days many people try to use the arduino because it makes things easier due to the ...