⚡ What Is a Relay? — In Simple Words A relay is an automati
⚡ What Is a Relay? — In Simple Words
A relay is an automatic electrical switch that can be turned ON or OFF by a small electrical signal instead of being operated by hand.
When a sensor or controller sends a signal to the relay, the relay can turn a motor, fan, pump, light, valve, or machine ON or OFF.
🔄 Simple Example:
Small Signal → Relay → Machine → Work Starts
For example, if the water level in a tank becomes low:
Sensor detects it → Controller gives a command → Relay turns ON the pump → Pump starts filling the tank.
🤖 In robots, relays can perform simple ON/OFF tasks, while motor drivers and feedback sensors are used for precise movements.
🧠 In One Simple Line:
“A relay is an automatic electrical switch that uses a small signal to control another electrical device.”
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