2 layers55.5 × 30 mm
Maxxfan ethernet controller
Pekaway/maxx-rj45-controller
i2c expansion board to control the MaxxFan via rj45 port.
33 parts5
RJ45
1 boardsKiCad boards from 1 GitHub repository tagged “rj45”, the most starred first; open any of them in PCBKit.