CN205486558U - Touch music door -bell circuit - Google Patents

Abstract

The utility model discloses a touch music door -bell circuit, including inductance L1, electric capacity C1, triode V1 and chip IC1, inductance L1's one end connecting resistance R1, resistance R3 and electric capacity C3, electrode slice M is connected to inductance L1's other end connection electric capacity C1, diode D1's negative pole, triode V1's collecting electrode and triode V2's collecting electrode triode V1's base. The utility model discloses touch music door -bell circuit simple structure, components and parts are few, use the touch panel mode, and for traditional mechanical switch, its long service life, the security performance is high, and the circuit uses music chip control simultaneously, consequently have stable performance, longe -lived and convenient to use's advantage.

Description

A touch music doorbell circuit

technical field

The utility model relates to a doorbell, in particular to a touch music doorbell circuit.

Background technique

The doorbell is an electronic device commonly used in daily life. It can effectively help the user to notify the people in the room, so it is loved by people. However, most of the existing doorbell lights are controlled by key switches. The mechanical contacts of the key switches are easily damaged, resulting in The service life of the doorbell is reduced. Once the button is damaged, the doorbell cannot be used. Usually people will directly discard it. Generally, it needs to be replaced in one or two years, so it needs to be improved.

Utility model content

The purpose of this utility model is to provide a touch music doorbell circuit to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A touch music doorbell circuit, comprising an inductor L1, a capacitor C1, a transistor V1 and a chip IC1, one end of the inductor L1 is connected to a resistor R1, a resistor R3 and a capacitor C3, and the other end of the inductor L1 is connected to a capacitor C1, a cathode of a diode D1, The collector of the transistor V1 and the collector of the transistor V2 are connected to the base of the transistor V1, and the emitter of the transistor V1 is connected to the negative pole of the power supply E, capacitor C2, capacitor C3, capacitor C4, resistor R4, resistor R5, and potentiometer RP1 A fixed end of the potentiometer RP1, the emitter of the transistor V3 and pin 2 of the chip IC2, the anode of the diode D1 is connected to the resistor R2, the other end of the resistor R2 is connected to the base of the transistor V4, and the collector of the transistor V4 Connect resistor R4 and pin 1 of chip IC1, pin 11 of chip IC1 is connected to the anode of diode D2, the cathode of diode D2 is connected to the other end of resistor R5 and the other end of capacitor C4, and the other end of resistor R1 is connected to the other end of capacitor C2 One end is connected to the base of the transistor V2, the emitter of the transistor V2 is connected to the other end of the capacitor C1 and the other fixed end of the potentiometer RP1, the collector of the transistor V3 is connected to the other end of the speaker B, and the base of the transistor V3 is connected to the chip IC2 Pin 1 and pin 5 of the chip IC2 are connected to pin 10 of the chip IC1, the model of the chip IC1 is CD4011, and the model of the chip IC2 is KD9561.

As a preferred solution of the utility model: the power supply E is 2 dry batteries.

Compared with the prior art, the beneficial effects of the utility model are: the utility model touch music doorbell circuit has a simple structure, fewer components, and uses a touch control method. Compared with the traditional mechanical switch, it has a long service life and high safety performance. At the same time, the circuit is controlled by a music chip, so it has the advantages of stable performance, long life and convenient use.

Description of drawings

Figure 1 is a circuit diagram of the touch music doorbell circuit.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1, a touch music doorbell circuit, including an inductor L1, a capacitor C1, a transistor V1 and a chip IC1, one end of the inductor L1 is connected to a resistor R1, a resistor R3 and a capacitor C3, and the other end of the inductor L1 is connected to a capacitor C1, The cathode of the diode D1, the collector of the triode V1 and the collector of the triode V2 are connected to the base of the transistor V1, and the emitter of the triode V1 is connected to the negative pole of the power supply E, the capacitor C2, the capacitor C3, the capacitor C4, the resistor R4, and the resistor R5, a fixed end of the potentiometer RP1, the sliding end of the potentiometer RP1, the emitter of the triode V3 and pin 2 of the chip IC2, the anode of the diode D1 is connected to the resistor R2, and the other end of the resistor R2 is connected to the base of the triode V4. The collector of transistor V4 is connected to resistor R4 and pin 1 of chip IC1, pin 11 of chip IC1 is connected to the anode of diode D2, the cathode of diode D2 is connected to the other end of resistor R5 and the other end of capacitor C4, and the other end of resistor R1 Connect the other end of the capacitor C2 to the base of the transistor V2, the emitter of the transistor V2 connects the other end of the capacitor C1 to the other fixed end of the potentiometer RP1, the collector of the transistor V3 connects to the other end of the speaker B, and the base of the transistor V3 The pole is connected to pin 1 of the chip IC2, and the pin 5 of the chip IC2 is connected to the pin 10 of the chip IC1. The model of the chip IC1 is CD4011, and the model of the chip IC2 is KD9561.

The power supply E is 2 dry batteries.

The working principle of the utility model is: the inductance L1, the capacitor C1 and the triode V2 in the circuit form an oscillator circuit. When in use, touch the electrode sheet M with hands, and the human body induction signal is added to the base of the triode V1 through the induction electrode sheet. The triode V1 is turned on, the oscillator stops working, and the collector of the triode V1 becomes high level, causing the diode D1 to be cut off, and then the triode V2 is turned off, and the function of the chip IC1 makes the diode D2 conduct and pass through D2 to the capacitor C4 Charging, the voltage on the capacitor C4 flips the NAND gate inside the chip IC1, thereby triggering the audio integrated circuit IC2, the signal output terminal 1 of the chip IC2 outputs a high level, the transistor V3 is turned on, and the speaker B makes a sound.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to be included in the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (2)

1. A touch music doorbell circuit, comprising inductance L1, capacitor C1, transistor V1 and chip IC1, characterized in that one end of the inductance L1 is connected to resistor R1, resistor R3 and capacitor C3, and the other end of inductance L1 is connected to capacitor C1 , the cathode of the diode D1, the collector of the triode V1 and the collector of the triode V2, the base of the triode V1 is connected to the electrode piece M, the emitter of the triode V1 is connected to the negative pole of the power supply E, the capacitor C2, the capacitor C3, the capacitor C4, the resistor R4, Resistor R5, a fixed end of the potentiometer RP1, the sliding end of the potentiometer RP1, the emitter of the triode V3 and pin 2 of the chip IC2, the anode of the diode D1 is connected to the resistor R2, and the other end of the resistor R2 is connected to the base of the triode V4 , the collector of transistor V4 is connected to resistor R4 and pin 1 of chip IC1, pin 11 of chip IC1 is connected to the anode of diode D2, the cathode of diode D2 is connected to the other end of resistor R5 and the other end of capacitor C4, and the other end of resistor R1 One end is connected to the other end of the capacitor C2 and the base of the transistor V2, the emitter of the transistor V2 is connected to the other end of the capacitor C1 and the other fixed end of the potentiometer RP1, the collector of the transistor V3 is connected to the other end of the speaker B, and the transistor V3 The base is connected to the pin 1 of the chip IC2, and the pin 5 of the chip IC2 is connected to the pin 10 of the chip IC1. The model of the chip IC1 is CD4011, and the model of the chip IC2 is KD9561. 2. A kind of touch music doorbell circuit according to claim 1, characterized in that, the power supply E is two dry batteries.