Open-source boards designed in KiCad by Oopsan204 on GitHub, from 3 repositories. A board’s address here is its repository’s there.
Oopsan204/AML_Micromouse_24_2
Oopsan204/IO_ISOLATOR_16INOUT
Input output isolator 16 channels.
Oopsan204/Pic-16F887-with-HCSR04