[Sayantan Pal] did this for the humble RGB LED matrix, creating an extra-thin version by recessing WS2812b NeoPixel LEDs ... used PCB thickness. Using EasyEDA, [Sayantan] designed a 8×8 matrix ...

[Colton Baldridge] has created the OS3M Mouse — an open source alternative using PCB coils and 3D printed flexures. The primary challenges in creating a 6DOF input device, similar to the ...