Engineer Lem Nok

🚦 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).

KT1, KT2, KT3: 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 KT1, turning on the green light (X1).

After 3 seconds, KT1 activates, switching to K2, starting timer KT2 and lighting up the yellow light (X2).

Another 3 seconds later, KT2 switches to K3, starting KT3 and turning on the red light (X3).

KT3, after 3 seconds, restarts the cycle by triggering K1 again via KT3’s NO contact.

✅ Why This is Useful:

This type of logic is used in:

Traffic signals 🚦

Industrial visual indicators 🏭

Teaching sequential control circuits 🧑‍🏫.



the page for more update.

With South Sudan Football Association – I just got recognized as one of their top fans!