Acousto-optic reminder of fixed-line telephone
A fixed telephone and reminder technology, applied in telephone communication, electrical components, etc., can solve problems such as low ringing sound, no light reminder, communication difficulties for children and the elderly, and achieve compact structure, avoid unnecessary worries, and facilitate telephone calls The effect of answering
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Embodiment 1
[0014] like figure 1 As shown, the sound and light reminder for fixed telephones includes tweeter 1, indicator light 2, solid state relay 3, filter capacitor 4, rectifier diode 5 and switch 8, and the two terminals of the ringing speaker 6 of fixed telephone 7 pass through wires respectively. Connected to the input end of the rectifier diode 5, the output end of the rectifier diode 5 is connected to the input end of the filter capacitor 4, the output end of the filter capacitor 4 is connected to the input control end of the solid state relay 3, and the AC power supply The positive end of the switch 8 is connected in series with one end of the switch 8, the other end of the switch 8 is connected in series with the first output load end 9 of the solid state relay 3, the second output load end 10 of the solid state relay 3 is connected with one end of the indicator light 2 In series, the other end of the indicator light 2 is connected in series with the negative terminal of the A...
Embodiment 2
[0021] like figure 1 As shown, the sound and light reminder for fixed telephones includes tweeter 1, indicator light 2, solid state relay 3, filter capacitor 4, rectifier diode 5 and switch 8, and the two terminals of the ringing speaker 6 of fixed telephone 7 pass through wires respectively. Connected to the input end of the rectifier diode 5, the output end of the rectifier diode 5 is connected to the input end of the filter capacitor 4, the output end of the filter capacitor 4 is connected to the input control end of the solid state relay 3, and the AC power supply The positive end of the switch 8 is connected in series with one end of the switch 8, the other end of the switch 8 is connected in series with the first output load end 9 of the solid state relay 3, the second output load end 10 of the solid state relay 3 is connected with one end of the indicator light 2 In series, the other end of the indicator light 2 is connected in series with the negative terminal of the A...
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