Many Thanks creator =VG= SemlerPDX Orginal Project Source: https://veterans-gaming.com/blogs/entry/32-diy-custom-game-controller-2-dial-hsi-course-and-heading-knobs/

I only added rotary library and modified the code with this library.

/* Modified and updated with PCINT code for QNH knob by Hakan GÖKMEN April2023 *

• • HDG AND CRS Encoders Pins:
• Rotary Encoder 1 - (OUTA-OUTB-SW) = Arduino Pins (0,1,15)
• Rotary Encoder 2 - (OUTA-OUTB-SW) = Arduino Pins (2,3,6)
• • QNH Encoder Pins:
• Rotary Encoder 3 - (OUTB-OUTA-SW) = Arduino Pins (9,8,10)
• Rotary Library
• by Brian Low
• https://github.com/brianlow/Rotary */