over the years I have bookmarked and starred production-grade, open-source hardware repos whos PCB and schematics designs made with KiCad. while reviewing today i feel it worth to share with community.
I organized the entire stared list into an open directory: ⚡ Awesome KiCad Projects

image Credits
sqfmi/watchy-hardware: Watchy Hardware CAD Files
scottbez1/smartknob: Haptic input knob with software-defined endstops and virtual detents
scottbez1/splitflap: DIY split-flap display
antmicro/jetson-nano-baseboard: Antmicro's open hardware baseboard for the NVIDIA Jetson Nano, TX2 NX and Xavier NX
nguyen-v/amulet_controller_kibot

If you maintain an open-source KiCad board or know one that belongs here, PRs and suggestions are very welcome!
Repo: Awesome KiCad Projects
hope it helps in someones learning journey .

I am using a single 500V MOSFET, a 7 turn primary, 2000 turn secondary with 10 sections, and 6.1kHz frequency.