Digital clock is a common Electric clock, which displays time in digital form and usually has alarm function. A digital clock typically consists of a small integrated circuit board and a digital display screen, which can display seconds, minutes, and hours. The digital clock can adjust the time through buttons or rotary switches, and has various alarm setting options, such as sound, light, and vibration.

The alarm function of a digital clock can help people wake up on time, remind them to work, remind them to take medication, and is widely used. The alarm function of a digital clock can wake people up through sound, light, vibration, and other means. Usually, multiple alarm clocks can be set to wake people up at different time points. In addition, the digital clock can also have other functions, such as Time switch, thermometer, calendar, etc.

It should be noted that the accuracy of a digital clock depends on the accuracy of its internal quartz crystal oscillator, so regular calibration is necessary to ensure its accuracy. In addition, digital clocks also need to avoid harsh environments such as excessive humidity, high temperatures, and strong magnetic fields to avoid affecting their accuracy and lifespan.