2 layers32 × 48 mm

DiyIrTower
maehw/DiyIrTower
Do-it-yourself infrared serial communication tower (compatible with LEGO IR serial tower)
17 parts12GPL-3.0
KiCad boards from 2 GitHub repositories tagged “lego”, the most starred first; open any of them in PCBKit.

maehw/DiyIrTower
Do-it-yourself infrared serial communication tower (compatible with LEGO IR serial tower)

rzuehlsd/DUPLO_Train_Remote_Controller
ESP32 Remote Controller for Lego DUPLO Trains with Record/Replay Function