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What is the use of the IN1 and IN2 pin?

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What is the use of the IN1 and IN2 pin?

(a) Input

(b) Output

(c) Ground

(d) Power input

This question was addressed to me in exam.

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

1 Answer

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Best answer
Right option is (a) Input

Best explanation: The IN1 and IN2 respectively are used for sending digital inputs to the module. They accept 5V usually if the module has a 5V rating. Some modules also come with a 3.3V rating so it is important to check the rating of the module to be used.

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