CN104299341A - Wireless remote control doorbell circuit capable of being used for communication - Google Patents

Abstract

Provided is a wireless remote control doorbell circuit capable of being used for communication. The wireless remote control doorbell circuit capable of being used for communication is characterized in that resistors R4-R9, capacitors C1-C10, a triode Q1, a triode Q2, an inductor L1, an inductor L2, a switch SA2, a power source, a microphone MIC, a sliding resistor RP, a TWH631 radio receiver module, an LM567 audio decoder and a music integrated circuit IC1 are included; the TWH631 radio receiver module is connected to the two ends of the power source; the output end of the TWH631 radio receiver module is connected with a pin (3) of the LM567 audio decoder, a pin (1) of the LM567 audio decoder is connected with a negative electrode of the power source through the capacitor C2, a pin (2) of the LM567 audio decoder is connected with the negative electrode of the power source through the capacitor C3, a pin (7) of the LM567 audio decoder is connected with the negative electrode of the power source, a pin (6) of the LM567 audio decoder is connected with the negative electrode of the power source, a pin (5) of the LM567 audio decoder is connected with the negative electrode of the power source through the sliding resistor RP and the resistor R4 which are connected in series, and a pin (8) of the LM567 audio decoder is connected with a positive electrode of the power source through the resistor R5, and is connected with a TR12 pin of the music integrated circuit IC1.

Description

A kind of wireless remote control doorbell circuit conversed

Technical field

The present invention relates to a kind of wireless remote control doorbell circuit conversed.

Background technology

Along with radiotelegraphy and the develop rapidly of network technology and increasing substantially of people's living standard, people to living environment safe, conveniently propose more and more higher requirement, especially in intelligent residence, not only the advantage such as safe and reliable, easy to use is in the intelligent doorbell product of one in the urgent need to a kind of for people, and therefore wireless remote control music door bell and button system has the huge market space.

Existing wireless remote control music doorbell, many employings have the remote-transmitter-reception special IC of encoding function, do sound source in conjunction with high tone quality electromechanical music door-bell, become a kind of sound interesting to listen to, remove line, Novel remote-control high tone quality doorbell easy for installation between bell button and sound source from.But there is the function that cannot realize voice call in this doorbell.

Summary of the invention

This is practical new for overcome above-mentioned existing technical deficiency, provides a kind of structure simple, with low cost, the wireless remote control doorbell circuit that can converse.

The present invention to achieve these goals concrete by the following technical solutions:

A kind of remote-control radio Mike radiating circuit, is characterized in that, comprise resistance R4-R9, electric capacity C1-C10, triode Q1-Q2, inductance L 1-L2, switch S A2, power supply, microphone MIC, swept resistance RP, TWH631 radio reception head, LM567 tone decoder, music integrated circuit IC1, TWH631 radio reception head is connected to both ends of power; TWH631 radio reception head output terminal connects 3 pins of LM567 tone decoder, 1 pin of LM567 tone decoder connects power cathode by C2,2 pins connect power cathode by electric capacity C3,7 pins connect power cathode, 6 pins connect power cathode by electric capacity C4,5 pins by series connection swept resistance RP and resistance R4 connect power cathode, 8 pins connect positive source by resistance R5, and 8 pins connect the TR12 pin of music integrated circuit IC1; The TR11 pin of music integrated circuit IC1 connects positive source by switch S A2, the TR12 pin of music integrated circuit IC1 is by resistance R6 ground connection, ENV pin is by electric capacity C5 ground connection, VSS pin connects power cathode, OSC1 pin is connected by resistance R7 with OSC2 pin, Vdd pin connects positive source by two diodes of series connection, and O/P pin connects the base stage of triode Q1 by resistance R8; The collector of triode Q1 connects loudspeaker, emitter connects power cathode, the base stage of triode Q2 connects the positive pole of power supply by resistance R9, the collector of triode Q2 connects electric capacity C10, inductance L 1, electric capacity C9, electric capacity C10, inductance L 1 connect positive source, the emitter of electric capacity C9 connecting triode Q2, the emitter of triode Q2 connects microphone MIC, the microphone MIC other end connects power cathode, the emitter of triode Q2 is connected with electric capacity C1, electric capacity C1 connects inductance L 2, and inductance L 2 is connected with antenna.

Beneficial effect of the present invention is as follows:

Microphone signal of the present invention inputs from transistor base unlike the past, but microphone is connected on emitter, when microphone self inductance current is with sound size variation, the working current of Q1 also can change thereupon, Cbe variate is simultaneously held in Q1 economize on electricity, in parallel with LC loop again after Cbe and C1 series connection, therefore, achieve frequency modulation.This connection of MIC completely avoid the distortion of sound signal through coupling capacitance, and therefore, the Hz-KHz of this microphone is wide, and tonequality is pure, working stability, even if hand touches antenna also can not affect LC oscillation frequency.

Accompanying drawing explanation

Fig. 1 is circuit structure diagram of the present invention.

Embodiment

Receiver is by TWH631 radio reception head, the device compositions such as LM567 tone decoder and " ding-dong one chirping of birds " KI-156 special IC, first TWH631 amplifies after receiving the signal from transmitter module, then deliver to LM567 by output terminal to decode, the centre frequency of code translator determines primarily of swept resistance RP+ resistance R4 and electric capacity C4, Opf=1 .1/ (RRP+R4) C4, adjustment swept resistance RP, centre frequency can be made to equal the modulating frequency 1kHz of transmitter, now 8 pin output low levels of integrated package, be added to the low triggering end TG2 of IC1, make it be subject to triggering send " ding-dong " signal and amplify driving loudspeaker BL sounding through transistor Q1.IC1 is one piece of " ding-dong-chirping of birds. " music integrated circuit, and it has two trigger ends, and one is high level trigger end TR11, and it triggers by high level, and what O/P end exported is chirping of birds signal, and this trigger end is invalid to low level; Another is low level trigger end TR12, and when triggering by low level, what O/P end exported is " ding-dong " signal, and it is invalid to high level.

The principle of work of this microphone is substantially identical with common wireless microphone circuit, but line and acoustical quality have improvement greatly.Circuit is shown in that accompanying drawing 1, Q2 and L1, C10, C9 etc. form FM high-frequency oscillating circuits, and adjustment L1, C10 value can change frequency of operation.C9 is the feedback capacity maintaining vibration.Microphone signal inputs from transistor base unlike the past, but microphone is connected on emitter, when microphone self inductance current is with sound size variation, the working current of Q2 also can change thereupon, Cbe variate is simultaneously held in Q2 economize on electricity, in parallel with LC loop again after Cbe and C2 series connection, therefore, achieve frequency modulation.This connection of MIC completely avoid the distortion of sound signal through coupling capacitance, and therefore, the Hz-KHz of this microphone is wide, and tonequality is pure, working stability, even if hand touches antenna also can not affect LC oscillation frequency.

Element is selected to make: oscillating tube Q1 selection fT>1000MHz, Icm >=100Ma, the high-frequency tube that β value is larger, as C3355, C3358, BFR96 etc.The Icm of 9018 only has 50mA, but can select according to actual; MIC selects the moving-coil microphone of 600 Ω, and current medium-to-high grade cable microphone mostly is this type of; L1 internal diameter is 5mm, forms around 5T with Φ 0.5mm enameled wire hollow; Emitting antenna directly can use finished antenna, also can make by oneself: coiler part internal diameter is 1cm, and hollow also elongates to 3cm around 15T, and straight extending portion is divided into 7cm, loads onto heating form with pyrocondensation gum cover, also can replace with the flexible circuit conductor of an about 10cm.

Installation and debugging: element installs, check errorless after, switch on power, make receiver by a pocket FM receiver.It should be noted that and therefore, power switch must be installed the VCD severe jamming reception that band radio frequency exports additional to radio-frequency modulator, use AV terminal broadcast program.Regulate FM receiver and L1 pitch of turn, make transmitting-receiving frequency corresponding, if desired by C10 switching value.The sound signal that radio exports is transported to VCD by large plug or sound amplifier carries out power amplification.Transmitting range and wireless sensitivity have much relations, but general all >=10 meters.

  

Claims (1)

1. the wireless remote control doorbell circuit can conversed, is characterized in that, comprises resistance R4-R9, electric capacity C1-C10, triode Q1-Q2, inductance L 1-L2, switch S A2, power supply, microphone MIC, swept resistance RP, TWH631 radio reception head, LM567 tone decoder, music integrated circuit IC1, TWH631 radio reception head is connected to both ends of power; TWH631 radio reception head output terminal connects 3 pins of LM567 tone decoder, 1 pin of LM567 tone decoder connects power cathode by C2,2 pins connect power cathode by electric capacity C3,7 pins connect power cathode, 6 pins connect power cathode by electric capacity C4,5 pins by series connection swept resistance RP and resistance R4 connect power cathode, 8 pins connect positive source by resistance R5, and 8 pins connect the TR12 pin of music integrated circuit IC1; The TR11 pin of music integrated circuit IC1 connects positive source by switch S A2, the TR12 pin of music integrated circuit IC1 is by resistance R6 ground connection, ENV pin is by electric capacity C5 ground connection, VSS pin connects power cathode, OSC1 pin is connected by resistance R7 with OSC2 pin, Vdd pin connects positive source by two diodes of series connection, and O/P pin connects the base stage of triode Q1 by resistance R8; The collector of triode Q1 connects loudspeaker, emitter connects power cathode, the base stage of triode Q2 connects the positive pole of power supply by resistance R9, the collector of triode Q2 connects electric capacity C10, inductance L 1, electric capacity C9, electric capacity C10, inductance L 1 connect positive source, the emitter of electric capacity C9 connecting triode Q2, the emitter of triode Q2 connects microphone MIC, the microphone MIC other end connects power cathode, the emitter of triode Q2 is connected with electric capacity C1, electric capacity C1 connects inductance L 2, and inductance L 2 is connected with antenna.