① Time system: Pointest -type quartz electronic alarm clock system includes quartz resonant, CMOS integrated circuit (frequency and driver), step motor (converting electrical energy to mechanical energy), counting and transmission mechanisms, pointer mechanisms and other components; digital formats The time system of quartz electronic alarm clocks includes quartz resonators, CMOS integrated circuits (frequency division, computing and driver), LCD display or light emitting diode, conductive rubber and other components; And line version and other components.

② Time System: There are two types. One is an output signal with an integrated circuit or a transistor switch circuit (separation element) to drive the speaker or other sound device; the other is to directly use the electromagnetic principle to hit the hammer to hit the alarm through the passage of the coil and the current. Or suck other sound devices.

There are many types of audio at the alarm clock.