家里新装了电话机,可是由于光线不好,拨号时还得开灯,觉得很不方便。因而参考电话机电路和光电耦合器、可控硅的工作原理,设计制作了一个电话灯,经一段时间试用后,觉得很实用。这种电话灯具有如下的功能: (1)拨号照明:摘机后灯即亮,可当作拨号照明灯。 (2)提醒挂机:打完电话,放回话筒,如果灯未熄灭,说明话筒未放好。提醒使用者正确挂机。 (3)盗打警示和外线断线提示:如你自家未打电 New home phone, but because of poor lighting, dial-up had to turn on the lights, I feel very inconvenient. Therefore, reference to the telephone circuit and optocoupler, SCR work principle, design and manufacture of a telephone light, after a period of trial, I feel very useful. This phone light has the following features: (1) Dial-up lighting: pick up the light that is bright, can be used as dial lighting. (2) to remind hook: finish the call, put back the microphone, if the light is not extinguished, indicating that the microphone is not put. Remind the user to hang up properly. (3) Pirates of the warning and break the line Tip: If you do not call their own