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Opto acoustic alarm clock, has electronic circuit connected to service network twenty minutes before set waking time by internal mechanical contact
Opto acoustic alarm clock, has electronic circuit connected to service network twenty minutes before set waking time by internal mechanical contact
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机译:光声闹钟,在通过内部机械触点设置唤醒时间之前的二十分钟,将电子电路连接到服务网络
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摘要
The clock has an electronic circuit connected to a service network twenty minutes before the set waking time by an internal mechanical contact. A lamp is switched on, and with the circuit a second lamp is switched on five minutes later. Two further lamps are illuminated and after the fourth lamp is illuminated, a time of five minutes passes before an acoustic tone is triggered.
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