CN216119039U

CN216119039U - Prompt tone drive circuit

Info

Publication number: CN216119039U
Application number: CN202121935297.2U
Authority: CN
Inventors: 何四喜
Original assignee: Shenzhen Hetaiyun Intelligent Technology Co ltd
Current assignee: Shenzhen Hetaiyun Intelligent Technology Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-03-22
Anticipated expiration: 2031-08-17

Abstract

The utility model relates to a prompt tone driving circuit, which comprises a control chip, a triode Q1, a triode Q2, a buzzer, an electrolytic capacitor and resistors R1-R6, wherein one output end of the control chip is respectively connected with one end of a resistor R2 and the base electrode of a triode Q1 through a resistor R3, the emitter of the triode Q1 and the other end of the resistor R2 are connected with a power supply VCC end, the collector of the triode Q1 is respectively connected with the anode of the electrolytic capacitor and one end of the resistor R1, and the cathode of the electrolytic capacitor is grounded through a resistor R4; the other output end of the control chip is respectively connected with one end of a resistor R6 and the base electrode of a triode Q2 through a resistor R5, the collector electrode of the triode Q2 is connected with the other end of a resistor R1, and a buzzer is connected with the resistor R1 in parallel. The application can provide abundant prompt tone functions for various host control panels controlled by the single chip microcomputer and various intelligent chips, improves the use experience of users, and meets the use sense requirements of the users.

Description

Prompt tone drive circuit

Technical Field

The utility model relates to the technical field of driving circuits, in particular to a prompt tone driving circuit.

Background

Through the technical development of electrical equipment for many years, various prompting sounding circuits are mature day by day, and the application occasions of prompting sounding are also wide day by day. Simple drop sound also faces upgrading and perfecting. The improvement of reliability and functionality in a stable, efficient and concise application environment is an important subject of research and design, and the provision of application circuits with various prompting sounds is an important research direction.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a warning tone driving circuit which can be used in a simple and narrow space, namely intelligent equipment with high requirements on convenience, high efficiency and high reliability, so that the use experience of a user is improved, and the use sensory requirements of the user are met.

In order to realize the purpose of the utility model, the following technical scheme is adopted:

a prompt tone driving circuit comprises a control chip U1, a triode Q1, a triode Q2, a buzzer B, an electrolytic capacitor C1 and resistors R1-R6, wherein an output end of the control chip U1 is respectively connected with one end of the resistor R2 and a base electrode of the triode Q1 through a resistor R3, an emitter electrode of the triode Q1 and the other end of the resistor R2 are connected with a power supply VCC end, a collector electrode of the triode Q1 is respectively connected with an anode of the electrolytic capacitor C1 and one end of the resistor R1, and a cathode of the electrolytic capacitor C1 is grounded through a resistor R4; the other output end of the control chip U1 is respectively connected with one end of a resistor R6 and the base electrode of a triode Q2 through a resistor R5, the collector electrode of the triode Q2 is connected with the other end of the resistor R1, the buzzer B is connected with the resistor R1 in parallel, and the emitter electrode of the triode Q2 and the other end of the resistor R6 are grounded.

In one embodiment, the capacitance value of the electrolytic capacitor C1 ranges from 10uF to 1000 uF; the resistance range of the resistor R4 is 10 omega-1K ohm.

In one embodiment, the control chip U1 is a single chip microcomputer control chip.

The prompt tone driving circuit provided by the application utilizes the control chip U1 to output a switching signal to control the nonlinear voltage generating circuit; and nonlinear voltage waveform is generated, signals with different frequencies are output by the control chip U1, when the amplitude and the frequency of the signals are changed, more pleasant prompt tones can be given, abundant prompt tone functions can be provided for various host control boards controlled by the single chip microcomputer and various intelligent chips, the use experience of a user is improved, and the use sense requirement of the user is met.

Drawings

Fig. 1 is a schematic circuit diagram of an alert tone driving circuit according to an embodiment.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings.

Referring to fig. 1, the present embodiment provides a warning tone driving circuit, including a control chip U1, a transistor Q1, a transistor Q2, a buzzer B, an electrolytic capacitor C1, and resistors R1 to R6, wherein an output terminal (PB5 pin) of the control chip U1 is connected to one end of a resistor R2 and a base of the transistor Q1 through a resistor R3, an emitter of the transistor Q1 and the other end of the resistor R2 are connected to a power VCC terminal, a collector of the transistor Q1 is connected to an anode of the electrolytic capacitor C1 and one end of the resistor R1, and a cathode of the electrolytic capacitor C1 is grounded through the resistor R4; the other output end (PB6 pin) of the control chip U1 is respectively connected with one end of a resistor R6 and the base electrode of a triode Q2 through a resistor R5, the collector electrode of the triode Q2 is connected with the other end of a resistor R1, a buzzer B is connected with the resistor R1 in parallel, and the emitter electrode of the triode Q2 and the other end of the resistor R6 are grounded.

In this embodiment, the transistor Q1, the electrolytic capacitor C1, and the resistors R2 to R4 constitute a nonlinear voltage generating circuit. The working principle is as follows: when a control signal sent to the base electrode of the triode Q1 by the control chip U1 is at a low potential, the triode Q1 is conducted to charge the electrolytic capacitor C1; when a control signal sent by the control chip U1 to the base electrode of the triode Q1 is high potential, the triode Q1 is disconnected, the electrolytic capacitor C1 starts to discharge to supply power to the buzzer B, the electrolytic capacitor C1 and the resistor R4 form an RC charging and discharging delay circuit, and the charging and discharging time range is determined by the capacitance range of the electrolytic capacitor C1 and the resistance range of the resistor R4. Along with the progress of charging and discharging, the voltage amplitude is nonlinear change, and control chip U1 output signals with different frequencies simultaneously, when the amplitude and the frequency of signal all change, drive buzzer B sound production to make buzzer B send out more pleasing to the eye prompt tone.

In this embodiment, the resistor R2 is a bias resistor, and the resistor R2 is disposed between the emitter and the base of the transistor Q1, so as to prevent the state of the transistor Q1 from being stable all the time when the control chip U1 is turned on.

Specifically, the capacitance value range of the electrolytic capacitor C1 is 10 uF-1000 uF, the resistance value range of the resistor R4 is 10 omega-1K ohm, and the charging and discharging time range is O.OOO1s-1 s; the control chip U1 may be a single chip microcomputer control chip, and the model of the single chip microcomputer control chip includes but is not limited to MC96F6332A, SC92F8461B, SC92F7446B, a96G148GR, N76E003 or BS84B 08A.

The warning tone driving circuit provided by the embodiment utilizes the control chip U1 to output a switching signal to control the nonlinear voltage generating circuit; and nonlinear voltage waveform is generated, signals with different frequencies are output by the control chip U1, when the amplitude and the frequency of the signals are changed, more pleasant prompt tones can be given, abundant prompt tone functions can be provided for various host control boards controlled by the single chip microcomputer and various intelligent chips, the use experience of a user is improved, and the use sense requirement of the user is met.

Claims

1. A prompt tone driving circuit is characterized by comprising a control chip U1, a triode Q1, a triode Q2, a buzzer B, an electrolytic capacitor C1 and resistors R1-R6, wherein one output end of the control chip U1 is respectively connected with one end of the resistor R2 and a base of the triode Q1 through a resistor R3, an emitter of the triode Q1 and the other end of the resistor R2 are connected with a power supply VCC end, a collector of the triode Q1 is respectively connected with an anode of the electrolytic capacitor C1 and one end of the resistor R1, and a cathode of the electrolytic capacitor C1 is grounded through a resistor R4; the other output end of the control chip U1 is respectively connected with one end of a resistor R6 and the base electrode of a triode Q2 through a resistor R5, the collector electrode of the triode Q2 is connected with the other end of the resistor R1, the buzzer B is connected with the resistor R1 in parallel, and the emitter electrode of the triode Q2 and the other end of the resistor R6 are grounded.

2. The cue tone driving circuit according to claim 1, wherein the electrolytic capacitor C1 has a capacitance value ranging from 10uF to 1000 uF; the resistance range of the resistor R4 is 10 omega-1K ohm.

3. The cue tone driving circuit of claim 1, wherein the control chip U1 is a single chip microcomputer control chip.