KiCad boards from 3 GitHub repositories tagged “traffic-light”, the most starred first; open any of them in PCBKit.
YousefAliAicha/sentinel-arduino-firmware
Adaptive traffic-light FSM on the Arduino UNO R3 — pedestrian preemption, LDR-gated night mode with HC-SR04 vehicle detection, and a multiplexed 7-segment countdown. Fully non-blocking.
RoboticsBrno/semafor
:vertical_traffic_light: Traffic light gadget for outdoor games designed for Helceletka.cz.
SimulatedFlow/kicad-board-2026-07-27-ampelkreuzunglernplatine
Traffic-light intersection learning board - 20 THT LEDs, driven by an STM32 Bluepill or a Raspberry Pi. Soldering practice / teaching kit, bare PCB.
RoboticsBrno/semafor
:vertical_traffic_light: Traffic light gadget for outdoor games designed for Helceletka.cz.