Biological instantaneous prevention and control circuit

Abstract

The utility model discloses a biological instantaneous prevention and control circuit in the technical field of electronic circuits, which comprises a control signal input end, a pulse signal input end and an output end, the control signal input end is connected with a first end of a first resistor and a first end of a second resistor, and a second end of the second resistor is connected with a base electrode of a first triode. The collector of the first triode is connected with the first end of the third resistor and the first end of the fourth resistor. By arranging the buzzer capable of emitting sound waves with a certain frequency and the control signal input end for controlling the frequency of the sound waves, sound wave signals with a certain frequency can be emitted at the moment when a circuit is switched on, so that cockroaches can be repelled, the cockroaches can be prevented from staying in the electric appliance, and the safety of the electric appliance is improved. The risk that a circuit in the electric appliance is corroded by excrement generated by cockroaches is effectively reduced, meanwhile, activities of mosquitoes and cockroaches in the electric appliance can be reduced, normal heat dissipation of the electric appliance is prevented from being affected, and therefore the after-sale failure rate of the electric appliance is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, specifically a biological instantaneous prevention and control circuit. Background Technology

[0002] Insects such as mosquitoes and cockroaches can easily enter household appliances (such as televisions and monitors) through the ventilation holes on the back cover. When these insects are active inside the appliances, they excrete corrosive substances. Over time, the accumulation of these excrements can corrode components on the circuit boards, leading to malfunctions or failures and causing short circuits. Furthermore, cockroaches often nest inside appliances, compressing or damaging circuit board wiring. The activity of mosquitoes and cockroaches can also affect the appliance's cooling system, causing overheating. Prolonged overheating can severely damage circuit boards and other electronic components, leading to increased failure rates. Utility Model Content

[0003] The purpose of this invention is to provide a biological instantaneous control circuit. By setting a buzzer that can emit sound waves of a certain frequency and a control signal input terminal that controls the frequency of the sound waves, a sound wave signal of a certain frequency can be emitted at the moment the circuit is turned on, thereby repelling cockroaches. This prevents cockroaches from staying inside electrical appliances, effectively reducing the risk of corrosion of the internal circuits by cockroach excrement. At the same time, it can reduce the activity of mosquitoes and cockroaches inside electrical appliances, avoiding affecting the normal heat dissipation of electrical equipment, thereby reducing the after-sales failure rate of electrical appliances.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A biological instantaneous control circuit includes a control signal input terminal, a pulse signal input terminal, and an output terminal. The control signal input terminal is connected to the first terminal of a first resistor R1 and the first terminal of a second resistor R2. The second terminal of the second resistor R2 is connected to the base of a first transistor Q1. The collector of the first transistor Q1 is connected to the first terminal of a third resistor R3 and the first terminal of a fourth resistor R4. The second terminal of the third resistor R3 is connected to a high-level signal. The second terminal of the fourth resistor R4 is connected to the first terminal of a first capacitor C1 and the gate of the first transistor Q2. The second terminal of the first capacitor C1 is connected to the source of the first transistor Q2. The drain of transistor Q2 is connected to the first terminal of the second capacitor C2. A diode D is connected between the source and drain of transistor Q2. The first terminal of the second capacitor C2 is connected to the first input terminal of the buzzer, and the second terminal of the second capacitor C2 is grounded. The pulse signal input terminal is connected to the first terminal of the fifth resistor R5 and the first terminal of the sixth resistor R6. The second terminal of the fifth resistor R5 is connected to the base of the second transistor Q3. The collector of the second transistor Q3 is connected to the second input terminal of the buzzer. The buzzer is used to emit a sound wave signal with a target frequency, which includes multiple frequency signal values.

[0006] The target frequency acoustic signal is an acoustic signal of 40kHz to 45kHz.

[0007] As a further embodiment of this utility model: the control signal input terminal is connected to an external controller, and the control signal input terminal is used to input a buzzer power control signal to the circuit. The pulse signal input terminal is used to input a PWM signal to the circuit. The PWM signal is a PWM square wave signal of 40KHZ-45KHZ. The control signal input terminal is a BUZZER-CTL connector, which is used to control the power signal of the buzzer. The pulse signal input terminal is a BUZZER-PWM connector, which is used to control the operating frequency of the buzzer.

[0008] As a further embodiment of this invention: the positive terminal of the diode D is connected to the first input terminal of the buzzer.

[0009] As a further embodiment of this utility model: the second end of the first resistor R1 is grounded, the resistance of the first resistor R1 is 47KΩ, and the resistance of the second resistor R2 is 10KΩ.

[0010] As a further embodiment of this utility model: the high level is a 12-volt positive voltage, the resistance of the third resistor R3 is 47KΩ, and the resistance of the fourth resistor R4 is 100KΩ.

[0011] As a further embodiment of this utility model: the capacitance of the first capacitor C1 is 100μF, the first terminal of the second capacitor C2 is connected to a high level, and the capacitance of the second capacitor C2 is 10μF.

[0012] As a further embodiment of this utility model: the resistance of the fifth resistor R5 is 10KΩ, the resistance of the sixth resistor R6 is 47KΩ, and the second end of the sixth resistor R6 is grounded.

[0013] As a further embodiment of this utility model: the first input terminal of the buzzer is a P input terminal, and the second input terminal of the buzzer is an N input terminal.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention, by setting up a buzzer that can emit sound waves of a certain frequency and a control signal input terminal to control the frequency of the sound waves, can emit a sound wave signal of a certain frequency at the moment the circuit is turned on, thereby repelling cockroaches and preventing them from staying inside electrical appliances. This effectively reduces the risk of the internal circuits of electrical appliances being corroded by cockroach excrement, and also reduces the activity of mosquitoes and cockroaches inside electrical appliances, avoiding affecting the normal heat dissipation of electrical equipment, thereby reducing the after-sales failure rate of electrical appliances. Attached Figure Description

[0016] Figure 1 This is the circuit connection diagram of this utility model;

[0017] Figure 2 This is the circuit diagram of the application module of this utility model.

[0018] In the picture: 1. Buzzer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example:

[0021] Please see Figure 1In this embodiment of the invention, a biological instantaneous control circuit includes a control signal input terminal, a pulse signal input terminal, and an output terminal. The control signal input terminal is connected to the first terminal of a first resistor R1 and the first terminal of a second resistor R2. The second terminal of the second resistor R2 is connected to the base of a first transistor Q1. The collector of the first transistor Q1 is connected to the first terminal of a third resistor R3 and the first terminal of a fourth resistor R4. The second terminal of the third resistor R3 is connected to a high level. The second terminal of the fourth resistor R4 is connected to the first terminal of a first capacitor C1 and the gate of the first transistor Q2. The second terminal of the first capacitor C1 is connected to the source of the first transistor Q2. The drain of the first transistor Q2 is connected to the first terminal of the second capacitor C2. A diode D is connected between the source and drain of the first transistor Q2. The first terminal of the second capacitor C2 is connected to the first input terminal of the buzzer 1, and the second terminal of the second capacitor C2 is grounded. The pulse signal input terminal is connected to the first terminal of the fifth resistor R5 and the first terminal of the sixth resistor R6. The second terminal of the fifth resistor R5 is connected to the base of the second transistor Q3. The collector of the second transistor Q3 is connected to the second input terminal of the buzzer 1. The buzzer 1 is used to emit a sound wave signal with a target frequency, which includes multiple frequency signal values.

[0022] The target frequency acoustic signal is a 40kHz acoustic signal.

[0023] Preferably, the control signal input terminal is connected to an external controller. The control signal input terminal is used to input the buzzer power control signal to the circuit. The pulse signal input terminal is used to input the PWM signal to the circuit. The PWM signal is a PWM square wave signal of 40KHZ-45KHZ. The control signal input terminal is a BUZZER-CTL connector terminal, which is used to control the power signal of the buzzer 1. The pulse signal input terminal is a BUZZER-PWM connector terminal, which is used to control the operating frequency of the buzzer 1.

[0024] Preferably, the positive terminal of diode D is connected to the first input terminal of buzzer 1.

[0025] Preferably, the second terminal of the first resistor R1 is grounded, the resistance of the first resistor R1 is 47KΩ, and the resistance of the second resistor R2 is 10KΩ.

[0026] Preferably, the high level is a 12-volt positive voltage, the resistance of the third resistor R3 is 47KΩ, and the resistance of the fourth resistor R4 is 100KΩ.

[0027] Preferably, the capacitance of the first capacitor C1 is 100μF, and the first terminal of the second capacitor C2 is connected to a high level, and the capacitance of the second capacitor C2 is 10μF.

[0028] Preferably, the fifth resistor R5 has a resistance of 10KΩ, the sixth resistor R6 has a resistance of 47KΩ, and the second terminal of the sixth resistor R6 is grounded.

[0029] Preferably, the first input terminal of the buzzer 1 is the P input terminal, and the second input terminal of the buzzer 1 is the N input terminal.

[0030] The working principle of this utility model is as follows: When a high level is output at one end of the BUZZER_CTL connection terminal, the high level is limited by the second resistor R2, which acts as a current-limiting resistor. This causes the first transistor Q1 to conduct, pulling down the gate voltage of the first transistor Q2. At this time, the VGS voltage of the first transistor Q2 is higher than the threshold voltage VTH and enters the conduction state, and the 12V voltage supplies power to the buzzer 1. When a low level is output at one end of the BUZZER_CTL connection terminal, the first transistor Q1 is not conducted, and the VGS voltage of the first transistor Q2 is equal to 0V, which cannot reach the threshold voltage. The first transistor Q2 then blocks the 12V voltage.

[0031] The first resistor R1 acts as a pull-down resistor to ensure that the initial level at one end of the BUZZER_CTL connection terminal is low. The fourth resistor R4 and the first capacitor C1 form an RC soft-start circuit to reduce the surge current and surge voltage of the first transistor Q2. The second capacitor C2 acts as a filter capacitor and is used to filter the buzzer 1.

[0032] One end of the BUZZER_PWM connector outputs a PWM square wave, which drives the second transistor Q3 to conduct, causing buzzer 1 to operate at the frequency corresponding to the PWM. Since cockroaches have a strong aversion to frequencies between 40kHz and 45kHz, and the human ear cannot perceive sounds in this frequency range, when one end of the BUZZER_PWM connector outputs a frequency between 40kHz and 45kHz, buzzer 1 can output the corresponding band to repel cockroaches.

[0033] like Figure 2 As shown, this utility model also provides an electrical system, including a SoC module. The first side pin of the SoC module is connected to a power module and an LED backlight driver module. The second side pin of the SoC module is connected to an RF module and a Bluetooth module. The third side pin of the SoC module is connected to a power amplifier circuit, a biological instantaneous prevention and control circuit, and a PWM frequency control circuit. One end of the BUZZER_PWM connection terminal is connected to the input terminal of the PWM frequency control circuit. The PWM frequency control circuit is used to change the output frequency signal value at regular intervals within a set period. The fourth side of the SoC module is connected to a timing controller. One end of the timing controller is connected to the input terminal of the drive circuit, and the output terminal of the drive circuit is connected to the LCD panel.

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A biological instantaneous control circuit, comprising a control signal input terminal, a pulse signal input terminal, and an output terminal, characterized in that: The control signal input terminal is connected to the first end of the first resistor and the first end of the second resistor. The second end of the second resistor is connected to the base of the first transistor. The collector of the first transistor is connected to the first end of the third resistor and the first end of the fourth resistor. The second end of the third resistor is connected to a high level. The second end of the fourth resistor is connected to the first end of the first capacitor and the gate of the first transistor. The second end of the first capacitor is connected to the source of the first transistor. The drain of the first transistor is connected to the first end of the second capacitor. A diode is connected between the source and the drain of the first transistor. The first end of the second capacitor is connected to the first input terminal of the buzzer (1). The second end of the second capacitor is grounded. The pulse signal input terminal is connected to the first end of the fifth resistor and the first end of the sixth resistor. The second end of the fifth resistor is connected to the base of the second transistor. The collector of the second transistor is connected to the second input terminal of the buzzer. The buzzer is used to emit a sound wave signal with a target frequency, which includes multiple frequency signal values.

2. The biological instantaneous control circuit according to claim 1, characterized in that: The control signal input terminal is connected to an external controller. The control signal input terminal is used to input a buzzer power control signal to the circuit, and the pulse signal input terminal is used to input a PWM signal to the circuit.

3. The biological instantaneous control circuit according to claim 1, characterized in that: The positive terminal of the diode is connected to the first input terminal of the buzzer (1).

4. The biological instantaneous control circuit according to claim 1, characterized in that: The second terminal of the first resistor is grounded. The resistance of the first resistor is 47KΩ, and the resistance of the second resistor is 10KΩ.

5. The biological instantaneous control circuit according to claim 1, characterized in that: The high level is a 12-volt positive voltage, the third resistor has a resistance of 47KΩ, and the fourth resistor has a resistance of 100KΩ.

6. The biological instantaneous control circuit according to claim 5, characterized in that: The first capacitor has a capacitance of 100μF, and the first terminal of the second capacitor is connected to a high level, and the capacitance of the second capacitor is 10μF.

7. The biological instantaneous control circuit according to claim 1, characterized in that: The fifth resistor R5 has a resistance of 10KΩ, the sixth resistor has a resistance of 47KΩ, and the second terminal of the sixth resistor is grounded.

8. The biological instantaneous control circuit according to claim 1, characterized in that: The first input terminal of the buzzer (1) is the P input terminal, and the second input terminal of the buzzer (1) is the N input terminal.

9. The biological instantaneous control circuit according to claim 1, characterized in that: The target frequency acoustic signal is an acoustic signal of 40kHz to 45kHz.

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