Traffic Light Control Circuit

 Traffic Light Control Circuit

🚦 Traffic Light Control Circuit with 3-Second Timer ⏱️💡

This diagram represents a sequential traffic light control system using contactors (K1, K2, K3) and timers (T1, T2, T3).

 It automates the switching between green, yellow, and red lights with a 3-second interval for each light.

🔌 Main Components:

S1 & S2: Start and stop push buttons for the system.

Q1: Circuit breaker for power protection.

K1, K2, K3: Contactors used to control each lamp (green, yellow, red).

T1, T2, T3: Time delay relays set to 3 seconds.

X1, X2, X3: Indicator lamps (green, yellow, red respectively).

⏱️ How the Circuit Works:

Start (S1): Energizes contactor K1 and timer T1, turning on the green light (X1).

After 3 seconds, T1 activates, switching to K2, starting timer T2 and lighting up the yellow light (X2).

Another 3 seconds later, T2 switches to K3, starting T3 and turning on the red light (X3).

T3, after 3 seconds, restarts the cycle by triggering K1 again via T3’s NO contact.

✅ Why This is Useful:

This type of logic is used in:

Traffic signals 🚦

Industrial visual indicators 🏭

Teaching sequential control circuits 🧑‍🏫

It ensures a safe and timed light sequence, improving road safety and training automation skills.