CN212872846U

CN212872846U - Alarm circuit for open circuit detection

Info

Publication number: CN212872846U
Application number: CN202021401276.8U
Authority: CN
Inventors: 黄振升; 郝明友; 王文龙; 金道为
Original assignee: Guangdong Ziwenxing Electronic Technology Co ltd
Current assignee: Guangdong Ziwenxing Electronic Technology Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-04-02
Anticipated expiration: 2030-07-16

Abstract

The utility model discloses an alarm circuit for open circuit detection, which comprises a detected circuit, a first diode, a second diode, a triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a buzzer, a USB interface, a first LED lamp and a second LED lamp, wherein when the open circuit detection alarm is electrified, the detected circuit can form a loop if closed, the first LED lamp is lightened, the second LED lamp and the buzzer do not work, and the open circuit detection alarm works normally; when being detected the circuit and for opening a way, then first diode and second diode make signal unidirectional conduction, the triode switch is opened, thereby the second LED lamp lights and reports to the police with the optics formula, and bee calling organ begins to report to the police with the sound form simultaneously, and first LED lamp extinguishes this moment, consequently the utility model discloses can apply to electronic product preparation, circuit analysis detects, test board key line switches on fields such as real-time supervision, comparatively extensively in the application, it is more simple and convenient to use.

Description

Alarm circuit for open circuit detection

Technical Field

The utility model relates to an alarm circuit especially relates to an alarm circuit that opens a way and detect.

Background

The existing alarm is an electronic product which reminds or warns people of taking certain action in the forms of sound, light, air pressure and the like in order to prevent or prevent the consequences caused by certain events, and is mainly applied to the fields of system faults, safety precaution, transportation, medical aid, emergency disaster relief and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned defect among the prior art, provide an alarm circuit that opens a way and detect, its detection problem of having solved open circuit, be convenient for detect the line analysis, also be convenient for switch on real-time supervision to board key line.

In order to achieve the above object, the present invention provides an alarm circuit for open circuit detection, which includes a circuit to be detected, a first diode, a second diode, a triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a buzzer, a USB interface, a first LED lamp and a second LED lamp; the first diode, the third resistor, the first LED lamp and the fourth resistor are sequentially connected in series end to end; one end of the third resistor and one end of the detected line are respectively and electrically connected with the anode of the first diode, and one end of the fourth resistor and the base electrode of the triode are respectively and electrically connected with the cathode of the first diode; the first resistor, the second LED lamp and the buzzer are sequentially connected end to end in series, one end of the first LED lamp, which is electrically connected with the fourth resistor, and one end of the USB interface are respectively electrically connected with one end of the second LED lamp, which is electrically connected with the buzzer, the other end of the USB interface is electrically connected with a detected circuit, and one end of the buzzer, which is electrically connected with the first resistor, is electrically connected with a collector electrode of the triode; the negative electrode of the second diode is electrically connected with the emitting electrode of the triode, the positive electrode of the second diode and one end of the second resistor are respectively and electrically connected with one end of the USB interface, which is electrically connected with the detected line, and the other end of the second resistor is electrically connected with the negative electrode of the first diode.

Preferably, the first LED lamp is a green LED lamp.

Preferably, the second LED lamp is a red LED lamp.

Preferably, the resistance value of the first resistor is 500-2000 Ω.

Preferably, the resistance value of the second resistor is 4.7K Ω.

Preferably, the resistance value of the third resistor is 500-2000 Ω.

Preferably, the fourth resistor has a resistance of 470 Ω.

Preferably, the specification models of the first diode and the second diode are both 1N 4007.

Preferably, the specification model of the triode is S8550.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model is provided with a detected line, a first diode, a second diode, a triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a buzzer, a USB interface, a first LED lamp and a second LED lamp, when the open circuit detection alarm is electrified, the detected line can form a loop if closed, the first LED lamp can be lightened, the second LED lamp and the buzzer do not work, and the open circuit detection alarm works normally; when being detected the circuit for the open circuit, then first diode and second diode make signal unidirectional conduction, and the triode switch is opened, thereby makes second LED lamp light and report to the police with the optics formula, and bee calling organ begins to report to the police with the sound form simultaneously, and first LED lamp extinguishes this moment, consequently the utility model discloses can apply to electronic product preparation, circuit analysis detects, test board key line switches on fields such as real-time supervision, and is relatively extensive in the use, and it is more simple and convenient to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a circuit diagram of an alarm circuit for detecting an open circuit according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides an alarm circuit that opens a way and detect, include by detection circuitry 1, first diode 2, second diode 3, triode 4, first resistance 5, second resistance 6, third resistance 7, fourth resistance 8, bee calling organ 9, USB interface 10, first LED lamp 11 and second LED lamp 12.

Specifically, the first diode 2, the third resistor 7, the first LED lamp 11 and the fourth resistor 8 are sequentially connected in series end to end; one end of the third resistor 7 and one end of the detected line 1 are respectively and electrically connected with the anode of the first diode 2, and one end of the fourth resistor 8 and the base of the triode 4 are respectively and electrically connected with the cathode of the first diode 2; the first resistor 5, the second LED lamp 12 and the buzzer 9 are sequentially connected end to end in series, one end of the first LED lamp 11, which is electrically connected with the fourth resistor 8, and one end of the USB interface 10 are respectively electrically connected with one end of the second LED lamp 12, which is electrically connected with the buzzer 9, the other end of the USB interface 10 is electrically connected with the detected line 1, and one end of the buzzer 9, which is electrically connected with the first resistor 5, is electrically connected with the collector of the triode 4; the cathode of the second diode 3 is electrically connected with the emitter of the triode 4, the anode of the second diode 3 and one end of the second resistor 6 are respectively electrically connected with one end of the USB interface 10 electrically connected with the detected line 1, and the other end of the second resistor 6 is electrically connected with the cathode of the first diode 2.

In the present embodiment, the first LED lamp 11 is preferably a green LED lamp; the second LED lamp 12 is preferably a red LED lamp; the resistance value of the first resistor 5 is preferably 500-2000 Ω; the resistance value of the second resistor 6 is preferably 4.7K Ω; the resistance value of the third resistor 7 is preferably 500-2000 Ω; the resistance value of the fourth resistor 8 is preferably 470 Ω; the specification models of the first diode 2 and the second diode 3 are preferably 1N 4007; the specification model of the triode 4 is preferably S8550.

The utility model discloses be equipped with by detection circuit 1, first diode 2, second diode 3, triode 4, first resistance 5, second resistance 6, third resistance 7, fourth resistance 8, bee calling organ 9, USB interface 10, first LED lamp 11 and second LED lamp 12, after open circuit detects the alarm circular telegram, detect circuit if closed then can form the return circuit, first LED lamp 11 can be lighted, second LED lamp 12 and bee calling organ 9 do not work at this moment; open a way and detect alarm normal work, when being detected the circuit for opening a way, then

first diode

2 and 3 messenger signal one-way conduction of second diode, triode 4 switch is opened, thereby makes second LED lamp 12 light and report to the police with the optics formula, and bee calling organ begins to report to the police with the sound form simultaneously, and first LED lamp 11 is extinguish this moment, consequently the utility model discloses can apply to electronic product preparation, line analysis detects, test board key line switches on fields such as real-time supervision, and is more extensive relatively in the use, and it is more simple and convenient to use.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. An alarm circuit for detecting an open circuit comprises a detected line (1), and is characterized by further comprising a first diode (2), a second diode (3), a triode (4), a first resistor (5), a second resistor (6), a third resistor (7), a fourth resistor (8), a buzzer (9), a USB interface (10), a first LED lamp (11) and a second LED lamp (12);

the first diode (2), the third resistor (7), the first LED lamp (11) and the fourth resistor (8) are sequentially connected in series end to end;

one end of the third resistor (7) and one end of the detected line (1) are respectively and electrically connected with the anode of the first diode (2), and one end of the fourth resistor (8) and the base of the triode (4) are respectively and electrically connected with the cathode of the first diode (2);

the first resistor (5), the second LED lamp (12) and the buzzer (9) are sequentially connected end to end in series, one end of the first LED lamp (11) electrically connected with the fourth resistor (8) and one end of the USB interface (10) are respectively electrically connected with one end of the second LED lamp (12) electrically connected with the buzzer (9), the other end of the USB interface (10) is electrically connected with the detected line (1), and one end of the buzzer (9) electrically connected with the first resistor (5) is electrically connected with the collector electrode of the triode (4);

the negative electrode of the second diode (3) is electrically connected with the emitting electrode of the triode (4), the positive electrode of the second diode (3) and one end of the second resistor (6) are respectively electrically connected with the USB interface (10) and one end electrically connected with the detected line (1), and the other end of the second resistor (6) is electrically connected with the negative electrode of the first diode (2).

2. An open circuit detecting alarm circuit according to claim 1, characterised in that the first LED lamp (11) is a green LED lamp.

3. An open circuit detecting alarm circuit according to claim 1, characterised in that the second LED lamp (12) is a red LED lamp.

4. The open circuit detection alarm circuit according to claim 1, wherein the first resistor (5) has a resistance of 500-2000 Ω.

5. An open circuit detecting alarm circuit according to claim 1, characterised in that the second resistor (6) has a value of 4.7K Ω.

6. The open circuit detection alarm circuit according to claim 1, wherein the third resistor (7) has a resistance of 500-2000 Ω.

7. An open circuit detecting alarm circuit according to claim 1, characterised in that the fourth resistor (8) has a value of 470 Ω.

8. An open circuit detecting alarm circuit according to claim 1, characterized in that the first diode (2) and the second diode (3) are both 1N4007 in size.

9. An open circuit detection alarm circuit according to claim 1, characterized in that the transistor (4) is of the specification type S8550.