https://circuit4hobby.altervista.org/plc-traffic-light.html
Traffic light project based on PLC ladder logic.
The cycle starts once you switch OFF the selector I0.5.
You may connect the input I0.1 or I0.2 to a photocell selector and make it work depending on the traffic conditions. If you keep on the selector I0.0 the traffic light works without photocell.
By turning ON the selector the yellow light blinks condition once the cycle is completed.
The project has been simulated with an S7 PLC.
Q0.0, Q0.3 – green light
Q0.1, Q0.4 -yellow light
Q0.2, Q0.5 – red light
Post time: Jun-19-2017