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What happens to the NO1 and NO2 pins when INT1 and INT2 is HIGH?

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What happens to the NO1 and NO2 pins when INT1 and INT2 is HIGH?

(a) Gets connected to COM

(b) Gets disconnected from COM

(c) Gets connected to Vcc

(d) Gets connected to GND

The question was asked in final exam.

My doubt is from Relay (Dual Channel) Module topic in chapter Interfacing of Sensors, Actuators, and Other Modules of Arduino

1 Answer

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The correct option is (b) Gets disconnected from COM

Easy explanation: A disconnected COM port gives the correct value of the state of the NO1 and NO2 pins when 5V or logical HIGH signal is fed to the INT1 and INT2 pins. Conversely they also get connected to the COM when INT1 and INT2 pins are set to LOW.

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