Question

How many terminals does the rotary encoder have?

(a) 1

(b) 3

(c) 5

(d) 4

This question was posed to me in examination.

The above asked question is from Rotary Encoder in division Interfacing of Sensors, Actuators, and Other Modules of Arduino

Answer 1

Right option is (c) 5

To explain I would say: The rotary encoder has 5 terminals which include the Vcc for power supply, the CLK for clock, DATA which provides us the output wave, and SWC which switches voltage to 0 and GND which is required for completing the circuit through the sensor and grounding it.