2 layers50 × 50 mm

555-Timer Soldering Demo
psuieee/projects2021
Penn State IEEE workshops from the fall 2021 and spring 2022 semesters
16 parts2MIT
KiCad boards from 2 GitHub repositories tagged “archive”, the most starred first; open any of them in PCBKit.

psuieee/projects2021
Penn State IEEE workshops from the fall 2021 and spring 2022 semesters

frindaddy/digichiver
Archival hardware/firmware for the MM54104 Digitalker chip