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Smart Automatic Exhaust Fan System | Timer Relay Project #scienceproject #tech

Smart Automatic Exhaust Fan System | Timer Relay Project #scienceproject #tech

This is my Smart Automatic Energy Saving Exhaust System — a DIY project built using a timer relay, buck converter, DC exhaust fan, LEDs, and a simple trigger switch. This system automatically turns ON the fan when someone enters and turns it OFF after a fixed time… helping reduce 80–85% electricity wastage in bathrooms, toilets, and small ...

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