CN213781151U - Low-power-consumption alarm circuit - Google Patents
Low-power-consumption alarm circuit Download PDFInfo
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- CN213781151U CN213781151U CN202023007535.1U CN202023007535U CN213781151U CN 213781151 U CN213781151 U CN 213781151U CN 202023007535 U CN202023007535 U CN 202023007535U CN 213781151 U CN213781151 U CN 213781151U
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Abstract
The utility model provides an alarm circuit of low-power consumption, it has reduced the consumption loss, reports to the police simultaneously sound clear, difficult interference. The voice frequency pulse modulation signal processing circuit comprises a buzzer, one end of the buzzer is connected with one end of a resistor R4, a collector of a triode T1 and a collector of a T3, the other end of the buzzer is connected with one end of a resistor R3, a collector of a triode T2 and a collector of a triode T3, the other end of a resistor R4 is connected with a base of a triode T2 and one end of a resistor R2, the other end of a resistor R3 is connected with a base of a triode T1 and one end of a resistor R1, an emitter of the triode T2 and the emitter of the triode T1, the other ends of the resistor R2 and the resistor R1 are connected with a voltage source VDD, the base of the triode T3 is connected with one end of a resistor R5 and one end of a resistor R7, the other end of the resistor R5 is connected with an input voice frequency pulse modulation signal IN1, the base of the triode T4 is connected with one end of a resistor R6 and one end of the resistor R8, the other end of the resistor R6 is connected with the input voice frequency pulse modulation signal IN2, the other end of the resistor R8 is grounded, and the input levels of the voice frequency pulse modulation signals IN1 and N2 are respectively at a high level and a low level.
Description
Technical Field
The utility model relates to a fire control electronic alarm system's technical field specifically is an alarm circuit of low-power consumption.
Background
The sounding alarm circuit is one of the important components of the fire-fighting electronic alarm system. A buzzer in the alarm sounding circuit generates sounding alarm when receiving abnormal audio pulse signals, however, in the existing sounding alarm circuit, because the voltage for starting the buzzer is a constant voltage source and is connected into the circuit in parallel with an inductor or a resistor, the circuit is easy to cause large power consumption loss and sound distortion, and meanwhile, the interference phenomenon is easy to generate.
SUMMERY OF THE UTILITY MODEL
To current sound production warning circuit easily arouse that the consumption loss is big, the sound distortion, the problem of easy interference simultaneously, the utility model provides a warning circuit of low-power consumption, it has reduced the consumption loss, reports to the police simultaneously sound clear, difficult interference.
The technical scheme is as follows: the utility model provides an alarm circuit of low-power consumption, its includes bee calling organ, its characterized in that: one end of the buzzer is connected with one end of a resistor R4, a collector of a triode T1 and a collector of a triode T3, the other end of the buzzer is connected with one end of a resistor R3, a collector of a triode T2 and a collector of a triode T4, the other end of the resistor R4 is connected with a base of a triode T2 and one end of a resistor R2, the other end of the resistor R3 is connected with a base of a triode T1 and one end of a resistor R1, an emitter of the triode T2, the other end of the resistor R2, the other end of the resistor R1 and an emitter of the triode T1 are connected with a voltage source VDD, the emitter of the triode T3 and the emitter of the triode T4 are grounded respectively, the base of the triode T3 is connected with one end of a resistor R5 and one end of a resistor R7, the other end of the resistor R5 is connected with an input audio pulse modulation signal IN1, the other end of the resistor R7 is grounded, and the base of the triode T4 is connected with one end of a resistor R6, One end of the resistor R8, the other end of the resistor R6 is connected with the input audio pulse modulation signal IN2, the other end of the resistor R8 is grounded, and the input levels of the audio pulse modulation signal IN1 and the audio pulse modulation signal IN2 are respectively high level and low level.
After the structure is adopted, because the input levels of the input audio pulse modulation signals IN1 and IN2 are respectively high level and low level, when IN1 is high level and IN2 is low level, the triodes T2 and T3 are conducted, the triodes T1 and T4 are cut off, and the voltage source VDD flows to the A end from the B end of the buzzer after being amplified by the triodes T2 and T3; when IN1 is low level and IN2 is high level, the triodes T2 and T3 are cut off, the triodes T1 and T4 are conducted, and the voltage source VDD flows from the A end to the B end of the buzzer through the triodes T1 and T4, so that the buzzer is started after the generated alternating voltage is amplified by the triodes, and sounds, the sound is clear, the power consumption loss is small, and the anti-interference capability is strong.
Drawings
Fig. 1 is a circuit diagram of the overall structure of the present invention.
Detailed Description
As shown IN FIG. 1, an alarm circuit with low power consumption comprises a buzzer, one end of the buzzer is connected with one end of a resistor R4, the collector of a triode T1 and the collector of a triode T3, the other end of the buzzer is connected with one end of a resistor R3, the collector of a triode T2 and the collector of a triode T4, the other end of a resistor R4 is connected with the base of a triode T2 and one end of a resistor R2, the other end of a resistor R3 is connected with the base of a triode T1 and one end of a resistor R1, the emitter of a triode T2, the other end of a resistor R2, the other end of a resistor R1 and the emitter of a triode T1 are connected with a voltage source VDD after being connected, the emitter of a triode T3 and the emitter of a triode T4 are respectively grounded, the base of the triode T3 is connected with one end of the resistor R5 and one end of a resistor R7, the other end of the resistor R5 is connected with an input audio pulse modulation signal IN1, the other end of the resistor R7 is grounded, the base of the triode T4 and the base of the triode T4 is connected with one end of a resistor R6, One end of the resistor R8, the other end of the resistor R6 is connected with the input audio pulse modulation signal IN2, the other end of the resistor R8 is grounded, and the input levels of the audio pulse modulation signal IN1 and the audio pulse modulation signal IN2 are respectively high level and low level and are programmed and sent by the single chip microcomputer.
The working principle of the utility model is as follows:
when the audio pulse modulation signal IN1 is at a high level and the audio pulse modulation signal IN2 is at a low level, the triodes T2 and T3 are conducted, the triodes T1 and T4 are cut off, and the voltage source VDD flows to the end A from the end B of the buzzer after being amplified by the triodes T2 and T3; when the audio pulse modulation signal IN1 is at a low level and the audio pulse modulation signal IN2 is at a high level, the triodes T2 and T3 are cut off, the triodes T1 and T4 are conducted, and the voltage source VDD flows from the end A to the end B of the buzzer through the triodes T1 and T4, so that the buzzer is started after the generated alternating voltage is amplified by the triodes, and sounds, therefore, the sounding is clear, the power consumption loss is small, and the anti-interference capability is strong.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. The utility model provides an alarm circuit of low-power consumption, its includes bee calling organ, its characterized in that: one end of the buzzer is connected with one end of a resistor R4, a collector of a triode T1 and a collector of a triode T3, the other end of the buzzer is connected with one end of a resistor R3, a collector of a triode T2 and a collector of a triode T4, the other end of the resistor R4 is connected with a base of a triode T2 and one end of a resistor R2, the other end of the resistor R3 is connected with a base of a triode T1 and one end of a resistor R1, an emitter of the triode T2, the other end of the resistor R2, the other end of the resistor R1 and an emitter of the triode T1 are connected with a voltage source VDD, the emitter of the triode T3 and the emitter of the triode T4 are grounded respectively, the base of the triode T3 is connected with one end of a resistor R5 and one end of a resistor R7, the other end of the resistor R5 is connected with an input audio pulse modulation signal IN1, the other end of the resistor R7 is grounded, and the base of the triode T4 is connected with one end of a resistor R6, One end of the resistor R8, the other end of the resistor R6 is connected with the input audio pulse modulation signal IN2, the other end of the resistor R8 is grounded, and the input levels of the audio pulse modulation signal IN1 and the audio pulse modulation signal IN2 are respectively high level and low level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023007535.1U CN213781151U (en) | 2020-12-15 | 2020-12-15 | Low-power-consumption alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023007535.1U CN213781151U (en) | 2020-12-15 | 2020-12-15 | Low-power-consumption alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213781151U true CN213781151U (en) | 2021-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023007535.1U Active CN213781151U (en) | 2020-12-15 | 2020-12-15 | Low-power-consumption alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213781151U (en) |
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2020
- 2020-12-15 CN CN202023007535.1U patent/CN213781151U/en active Active
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