CN211150092U

CN211150092U - Passive buzzer sound device with voltage larger than 10V

Info

Publication number: CN211150092U
Application number: CN201921460750.1U
Authority: CN
Inventors: 李敏
Original assignee: Shenzhen Lingbao Electronics Co ltd
Current assignee: Shenzhen Lingbao Electronics Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-07-31
Anticipated expiration: 2029-09-04

Abstract

The utility model discloses a voltage is greater than 10V's passive buzzer ring sound device, including triode Q5, buzzer FMQ, diode D3, resistance R7 and resistance RFM1, triode Q5's base passes through resistance R7 and connects the sound signal input, and diode D3's positive pole and ground are connected to triode Q5's projecting pole, triode Q5's collecting electrode connecting resistance RFM1, diode D3's negative pole and buzzer FMQ, and electric capacity C1D, power end and buzzer FMQ's the other end are connected to resistance RFM 1's the other end. The utility model discloses simple structure is stable, does not use the inductance to step up, has solved the interference noise with high frequency transformer, and cost and low: only 0.0904 yuan, saves more than 3 times of cost compared with the prior art.

Description

Passive buzzer sound device with voltage larger than 10V

Technical Field

The utility model relates to a bee calling organ technical field specifically is a voltage is greater than 10V's passive bee calling organ ring tone device.

Background

Currently, passive buzzers are becoming more widely used and are replacing active buzzers as the cost of active buzzers is higher, and the cost of passive buzzers can be saved by half basically.

At present, most of the methods adopt the form of a resistor, a four-pin or three-pin boosting inductor, a driving triode and a driving resistor:

(1) if the circuit of the high-frequency transformer is encountered, the interference with the high-frequency transformer is generated, certain noise is generated in the boosting inductor and the passive buzzer, and if the distance between the boosting inductor and the passive buzzer is long, weak sound is generated.

(2) The current passive buzzer buzzing driving device has the following cost: 0.4234 yuan;

wherein, the resistance: 0.027 x 2-membered; triode: 0.048-membered; a diode: 0.04 yuan; boost inductance: 0.33-membered;

(3) the current passive buzzer ringing driving device circuit is shown in figure 1.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a voltage is greater than 10V's passive buzzer device that rings, in order to solve the problem that proposes in the background art.

In order to realize the purpose, the utility model provides a following technical scheme:

a passive buzzer ringing device with voltage larger than 10V comprises a triode Q5, a buzzer FMQ, a diode D3, a resistor R7 and a resistor RFM1, wherein the base electrode of the triode Q5 is connected with a sound signal input end through a resistor R7, the emitter electrode of a triode Q5 is connected with the anode of the diode D3 and the ground, the collector electrode of the triode Q5 is connected with the resistor RFM1, the cathode of the diode D3 and the buzzer FMQ, and the other end of the resistor RFM1 is connected with a capacitor C1D, a power supply end and the other end of the buzzer FMQ.

As a further aspect of the present invention: the type of the diode D3 is IN4007 or IN 5819.

As a further aspect of the present invention: the triode Q5 is an NPN triode with the model number of 8050D or 9014.

As a further aspect of the present invention: the resistor RFM1 is a common resistor, and can be selected from 0-1K according to actual adjustment.

As a further aspect of the present invention: the voltage of the power supply end is 10V-25V.

As a further aspect of the present invention: the signal frequency received by the sound signal input end is 2KHz-5 KHz.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses simple structure is stable, does not use the inductance to step up, has solved the interference noise with high frequency transformer, and cost and low: only 0.0904 yuan, saves more than 3 times of cost compared with the prior art.

Drawings

Fig. 1 is a circuit diagram of the prior art of the present invention;

fig. 2 is a circuit diagram of the present design of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 2, to achieve the above object, the present invention provides the following technical solutions:

a passive buzzer buzzing device with voltage larger than 10V, 1, comprising a diode: d3(4007 or 5819); two resistors: RFM1, R7; a triode: q5(8050D or other); one capacitance: C1D (105P).

2. RFM1 resistance span: generally, the larger the resistance is, the smaller the sound is, the larger the resistance is, and the 12V is, for example, the 200 ohm resistance, the sound can reach about 80 decibels,

3. d3 is for IN4007(IN5819) protection triode.

4. Transistor Q5(8050D, 9014) function: the sound is amplified and driven.

5. R7 has the main function of driving the G pole of the triode by selecting proper resistance.

6. The resistor RFM1(24 ohm-1K) or (0-1K) is used to regulate the sound and current, and the larger the sound, the larger the current.

7. The capacitors C1D (104P-106P) and RFM1(24-1000 ohms) form RC oscillation, when the ringing is output, two ends form pressure difference in time and the effect of adjustment is sensed, when the voltage is 12V, a resistor 200 ohms/capacitor 105P can be selected, but the capacitor is larger in principle, and the sound is better; the smaller the resistor RFM1, the louder the sound, but enough current to supply.

8. The cost of this design: the resistor R7 is 0.0027 yuan, the triode Q5 is 0.048 yuan, the diode D3: 0.0024-membered, capacitance C1D: 0.013 yuan, resistance RFM1:0.0027 yuan, total cost is: 0.0904 yuan.

The principle is as follows: the sound is amplified by a Q5 triode at the frequency of 2KHz-5KHz, and then RC oscillation is caused by a C1D capacitor and RFM1, so that the two ends of the passive buzzer form the difference of sound frequency, and sound is emitted by resonance with the passive buzzer.

The cost of this design: the resistor R7 is 0.0027 yuan, the triode Q5 is 0.048 yuan, the diode D3: 0.0024-membered, dipolar D, D2 (5819): 0.04 × 2 ═ 0.08 element, capacitance C1D: 0.013 yuan, resistance RFM 2: 0.0027 yuan, resistance RFM1:0.003 yuan, total cost is: 0.1734 yuan.

Example 2, as another embodiment of the present design: the input voltage of the power supply end adopted by the design is 1.5-25V, so that the design is suitable for buzzer drive control design under different scenes, and the application range is wide.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A passive buzzer ringing device with voltage larger than 10V comprises a triode Q5, a buzzer FMQ, a diode D3, a resistor R7 and a resistor RFM1, and is characterized in that the base of the triode Q5 is connected with a sound signal input end through a resistor R7, the emitter of a triode Q5 is connected with the anode of the diode D3 and the ground, the collector of the triode Q5 is connected with a resistor RFM1, the cathode of the diode D3 and the buzzer FMQ, and the other end of the resistor RFM1 is connected with a capacitor C1D, a power supply end and the other end of the buzzer FMQ.

2. A passive buzzer ringing device with a voltage greater than 10V, according to claim 1, wherein said diode D3 is of the type IN4007 or IN 5819.

3. The passive buzzer ringing device with voltage greater than 10V as claimed in claim 1, wherein said transistor Q5 is NPN transistor, its type is 8050D or 9014.

4. A passive buzzer ringing device with a voltage greater than 10V, as claimed in claim 1, wherein said resistor RFM1 is 24 ohms-1K ohms.

5. A passive buzzer ringing device with a voltage greater than 10V, according to claim 1, wherein said power supply terminal has a voltage of 10V-25V.

6. A passive buzzer ringing device with a voltage greater than 10 volts according to any one of claims 1 to 4, wherein the frequency of the signal received at said acoustic signal input is 2KHz to 5 KHz.