一般的折合型石英钟内部有一开关,当设定时间一到,该开关便接通蜂鸣器,发出“嘀—嘀”的报时声,该开关在一小时之后就会自动切断。利用这个开关,可制作一个简易的低压电器定时开关,用来控制收音机, The usual folded quartz clock has a switch inside. When the setting time is up, the switch turns on the buzzer and a “tick-ticking” chime sound is generated, which switches off automatically after one hour. Use this switch, can make a simple low-voltage electrical timer switch, used to control the radio,