CN2144835Y

CN2144835Y - Electronic door bell with leaving message device

Info

Publication number: CN2144835Y
Application number: CN 92242892
Authority: CN
Inventors: 应可勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-24
Filing date: 1992-12-24
Publication date: 1993-10-27
Anticipated expiration: 2002-12-24

Abstract

The utility model discloses an electronic door bell with a leaving message device which is composed of a leaving message input circuit, a language transformation circuit, a storage circuit, a display circuit, a counting circuit and a door bell. The electronic door bell with a leaving message device has no a mechanical device and magnetic media, and the left message and the door bell are combined together, so the utility model has two kinds of functions. The utility model has the advantages of small size, low cost and reliable performance. The electronic door bell with a leaving message device can be used on the occasions such as families, etc.

Description

Electronic door bell with leaving message device

The utility model belongs to electronic technology field, is a kind of electronic door bell message device with message-leaving function specifically.

At present, doorbell commonly used has various electronic door bells, Machinery door bell etc., and its message device is the message just recorded device that has tape; But function is all more single and cost is also higher.

The purpose of this utility model be design a kind of in light weight, volume is little, the electronic door bell of dependable performance message device.

Fig. 1 is a theory diagram of the present utility model, is made up of message input and output circuit A, language conversion circuit B, memory circuit C, display circuit D, counting circuit E and doorbell circuit F.Its course of work is: doorbell circuit F work when ringing a doorbell button, and doorbell makes a noise and rings; As no one in the family, can be by the message button, message becomes language conversion electric signal and it is stored in circuit C by circuit A and language conversion circuit B, display circuit D and counting circuit E work simultaneously, when pressing player button, the content in the data chip is sent message by conversion by loudspeaker.

Fig. 2 is circuit theory diagrams of the present utility model, wherein AN1, IC0 form doorbell circuit, D1, C1, R1, R2, C2, IC1, IC2, IC3, AN4, AN2, IC6, IC9 and R3 form counting circuit, IC5, H forms display circuit, IC4, R4, R5, BG1, L1, AN3, C3, C4 form the language conversion circuit, and IC8 constitutes memory circuit, and M1, M2, IC7 form message input and output circuit.Its concrete course of work is: when family has man-hour, message power switch AN4 disconnects, this moment power supply V _DDOnly power to doorbell circuit.When the family no one, switch AN4 connects, and this moment, capacitor C 2 began charging; Because C2 is equivalent to short circuit at the beginning, the positive terminal voltage of C2 is lower, after IC1A is anti-phase, IC2B is automatically reset.Along with the increase in duration of charging, the pressure drop at C two ends slowly increases, and its anode is noble potential, exports IC after IC1A is anti-phase to ₂Prepare B, this moment counting.If press bell button AN1 thereafter, be the main doorbell circuit work of forming with IC0, C1 begins charging simultaneously.When unclamping AN1, C1 discharges over the ground by R1.The velocity of discharge of value scalable C1 by changing C1, R1 decide on the message time, if this moment is again by the key AN2 that leaves a message; By triggering, with IC3 high level of monostable circuit output of core.Equally, according to this high level time of message time scalable.The positive terminal voltage of this high level and C1 is step-down after IC1B processing, is passed to the input end of IC2B, and IC1B also links to each other by divider resistance R5 its output during chance with the BG1 base stage.The BG1 collector is by resistance R 4 and power supply V _DDLink to each other.Collector output connects the recording end of IC4, grounded emitter.Because the output of IC1B is to drop to low level from high level, its negative edge triggers IC2B and counts.Simultaneously, the low level of IC1B makes BG1 end, thereby V _CCPower to IC4 recording end by R4.

The input of IC9 has two kinds of functions, and the one, the message order is selected, and the 2nd, the playback order is selected.Its output is used for control store chip IC 5 and charactron H.Message converts sound to electric signal by acoustic transducer M1 and sends into IC4.Conversion through IC4 is placed on the form of message content with digital signal in the storage chip IC8; The output of IC9 meanwhile can come the displayed record number of times by IC5 and charactron H, can be used to select to deposit the section of message data RAM chip IC 8 again.Through the message that must be after the time, the C1 discharge off, its anode becomes low level, and the output of monostable circuit IC3 also becomes low level, and the output of IC1B then is high level like this, the BG1 conducting, the current potential step-down of BG1 collector, thus make IC4 stop message.

Its playback process is: can know the message number of times from charactron H, press the AN3 knob, became high level because the dividing potential drop effect of R3 is low level IC4 playback end originally.The output step-down of IC1C and make IC2A work simultaneously, the input of IC2A are that the astable circuit of core provides with IC6 by one.According to the priority of message time, the output of IC3A is selected each message after by IC9 successively.The digital signal of taking out in the IC8 is passed to IC7 and amplifies after the IC4 conversion.Again by electroacoustics transducer M ₂Spread out of acoustic energy.

The bipod of language conversion chip IC 4 is connected to L1, C3, C4, and this electric capacity and inductance are formed sample circuit, by changing sample frequency, can regulate message time length.

The utility model compared with prior art because no mechanical structure of this device and magnetic medium, thereby volume is little, in light weight, cost is low, dependable performance, long service life is simple to operate.

Fig. 1 is a theory diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment of the present utility model as shown in Figure 2, wherein Sheffer stroke gate IC1 selects 74LS00 for use, counter IC2 selects 74LS393 for use, language conversion chip IC 4 selects for use YYH40 or YYH402, code translator IC5 to select 74LS47 for use, IC0, IC6, IC3 select the NE555 time base circuit for use, amplifier piece IC7 selects LM386 for use, storage block IC8 select for use 41256 62256 or the door IC9 select 74LS32 for use.

Claims

1, a kind of electronic door bell message device of forming by electron device, it is characterized in that described electronic door bell message device is by message input and output circuit A, language conversion circuit B, memory circuit C, display circuit D, counting circuit E and doorbell circuit F form, its acoustic signals becomes electric signal input language change-over circuit B through the message input circuit and transports to language memory circuit C with the form of digital signal and preserve, and drives counting circuit E and display circuit D simultaneously.

2, electronic door bell message device according to claim 1, it is characterized in that, described circuit A is made up of M1, M2, IC7, circuit B is made up of IC4, R4, R5, BG1, L1, AN2, AN3, C3 and C4, circuit C is made of IC8, circuit D is made up of IC5 and H, and circuit E is by D ₁, C ₁, R ₁, R ₂, C ₂, IC ₁, IC ₂, IC ₃, AN ₄, IC ₆, IC ₉, and R ₃Form, circuit F is by AN ₁And IC0 forms.