Kizspy | Question: 37 (Choose 1 answer)
The digital pin D2 of Arduino Uno generates a square wave, making an LED on for 1 second and off for 4 seconds. If the LED's anode is connected to 5 V and the LED's cathode is connected to pin D2, what is the duty cycle of this square wave?
A. 20%
B. 25%
C. 80%
D. 90%
