For the timer program shown, the timer starts timing when:
A)PB1 is open.
B)PB1 is closed.
C)SS1 is open.
D)SS1 is closed.

Name: For the timer program shown, the timer starts timing when: A)PB1 is open. B)PB1 is closed. C)SS1 is open. D)SS1 is closed.
Brand: Quizplus
Rating: 4.8 (30 reviews)

Question

For the timer program shown, the timer starts timing when: 
A)PB1 is open. 
B)PB1 is closed. 
C)SS1 is open. 
D)SS1 is closed.

Quizplus · Accepted Answer

The timer program is triggered by a falling edge on the PB1 switch. A closed switch means it has continuity, and when it is opened, the continuity is broken which creates a falling edge. Therefore, the timer starts timing when PB1 is closed.

For the Timer Program Shown, the Timer Starts Timing When