Usage patterns
目覚まし時計をセットするto set an alarm clock
Since I have an early start tomorrow, I set the alarm clock for 6.
目覚まし時計が鳴るfor an alarm clock to go off
I couldn't wake up even when the alarm clock went off.
目覚まし時計を止めるto stop/turn off an alarm clock
Still half-asleep, I turned off the alarm clock without meaning to.