I set my alarm clock for 4:30.

我把闹钟定在4:30。

《柯林斯英汉双解大词典》

I overslept because my alarm clock didn't go off this morning.

我睡过头了，因为我的闹钟今天早上没有响。

youdao

My alarm clock failed this morning.

我的闹钟今天早上没响。

youdao

I hear, perhaps, the sounds of the cars outside my house, my alarm clock ringing, what have you.

我听到,轿车的声音从室外传来,或是闹钟的铃响,随你想象

耶鲁公开课 - 死亡课程节选

The meeting cancellation resets not only my alarm clock but the coffee machine as well.

FORBES: Making The Internet Of Things A Reality: Mobility Meets Big Data In The Cloud -- "Triple Word Score"!

Well, what if my calendar could talk to my alarm clock across the Internet?

FORBES: Making The Internet Of Things A Reality: Mobility Meets Big Data In The Cloud -- "Triple Word Score"!

The cancelled meeting would trigger my alarm clock being set back an hour, allowing me to sleep a little longer.

FORBES: Making The Internet Of Things A Reality: Mobility Meets Big Data In The Cloud -- "Triple Word Score"!