Control signal delay circuit

Abstract

The utility model discloses a control signal delay circuit, which comprises a sound acquisition circuit, a touch key circuit, a switch control circuit and a delay broadcast circuit, the input end of the switch control circuit is respectively connected with the sound acquisition circuit and the touch key circuit, and the output end of the switch control circuit is connected with the delay broadcast circuit. The sound acquisition circuit is used for acquiring sound signals; the touch key circuit is used for sending a touch signal; and the switch control circuit is used for receiving the sound signal acquired by the sound acquisition circuit and the touch signal sent by the switch control circuit, and controlling the time-delay broadcasting circuit to carry out time-delay broadcasting. According to the utility model, the manufacturing cost is low, the automation degree is high, the timing time can be set in the delay broadcast circuit, the sound is played when the set timing time is up, a house owner is notified in time, and the personalized customization requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of smart home, and in particular discloses a control signal delay circuit. Background Art

[0002] With the popularization of smart home, electronic doorbell system, as an important part of smart home, has broad application prospects.

[0003] Currently, most of the electronic doorbells on the market are push-button electronic doorbells with relatively simple functions and cannot meet the needs of personalized customization.

[0004] Therefore, the existing electronic doorbells are relatively single and cannot meet the needs of personalized customization, which is a technical problem that needs to be solved urgently. Utility Model Content

[0005] The utility model provides a control signal delay circuit, aiming to solve the technical problem that the existing electronic doorbell has a relatively single function and cannot meet the demand for personalized customization.

[0006] The utility model relates to a control signal delay circuit, comprising a sound collection circuit, a touch key circuit, a switch control circuit and a delayed broadcast circuit, wherein the input end of the switch control circuit is respectively connected to the sound collection circuit and the touch key circuit, and the output end of the switch control circuit is connected to the delayed broadcast circuit.

[0007] Furthermore, the touch button circuit includes a touch button and a first resistor connected to the touch button.

[0008] Furthermore, the switch control circuit includes a first electronic control switch and a second electronic control switch connected to the first electronic control switch.

[0009] Furthermore, the first electronic control switch adopts a PNP transistor, and the model of the PNP transistor is 9012.

[0010] Furthermore, the second electronic control switch adopts an NPN transistor, and the model of the NPN transistor is 9013.

[0011] Furthermore, the delayed broadcast circuit adopts an audio multivibrator.

[0012] Furthermore, the audio multivibrator includes a second resistor, a third resistor, a first capacitor, a timing chip and a speaker, the seventh pin of the timing chip is connected to the switch control circuit through the second resistor, one end of the third resistor is connected to the seventh pin of the timing chip, and the other end of the third resistor is connected to the sixth pin of the timing chip; the sixth pin of the timing chip is connected to the second pin of the timing chip and is grounded through the first capacitor; the third pin of the timing chip is connected to the speaker.

[0013] Furthermore, the timing chip is 555.

[0014] Furthermore, the sound collection circuit includes a microphone.

[0015] The beneficial effects achieved by the utility model are:

[0016] The utility model provides a control signal delay circuit, including a sound collection circuit, a touch button circuit, a switch control circuit and a delayed broadcast circuit. The input end of the switch control circuit is connected to the sound collection circuit and the touch button circuit respectively, and the output end of the switch control circuit is connected to the delayed broadcast circuit. The sound collection circuit is used to collect sound signals; the touch button circuit is used to send touch signals; the switch control circuit is used to receive the sound signals collected by the sound collection circuit and the touch signals sent by the switch control circuit, and control the delayed broadcast circuit to perform delayed broadcast. The control signal delay circuit provided by the utility model has low production cost and high automation, and can set a timing time in the delayed broadcast circuit. When the set timing time is reached, the sound is played to notify the homeowner in time, meeting the personalized customization needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a functional block diagram of the control signal delay circuit of the utility model;

[0018] Figure 2 It is a circuit diagram of the control signal delay circuit of the utility model.

[0019] Description of Figure Numbers:

[0020] 10. Sound collection circuit; 20. Touch button circuit; 30. Switch control circuit; 40. Delay broadcast circuit. DETAILED DESCRIPTION

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1 and Figure 2As shown, the first embodiment of the utility model proposes a control signal delay circuit, including a power supply circuit, a sound collection circuit 10, a touch button circuit 20, a switch control circuit 30 and a delayed broadcast circuit 40, the input end of the switch control circuit 30 is connected to the sound collection circuit 10 and the touch button circuit 20 respectively, and the output end of the switch control circuit 30 is connected to the delayed broadcast circuit 40, the sound collection circuit 10 is used to collect sound signals; the touch button circuit 20 is used to send touch signals; the switch control circuit 30 is used to receive the sound signal collected by the sound collection circuit 10 and the touch signal sent by the switch control circuit, and when the sound signal collected by the sound collection circuit 10 or the touch signal sent by the switch control circuit is received, the delayed broadcast circuit 40 is controlled to perform delayed broadcast. The power supply circuit is connected to the sound collection circuit 10, the touch button circuit 20, the switch control circuit 30 and the delayed broadcast circuit 40 respectively, and is used to supply power to the sound collection circuit 10, the touch button circuit 20, the switch control circuit 30 and the delayed broadcast circuit 40 respectively. The power supply circuit includes a transformer, a rectifier, a filter circuit and a voltage stabilizing circuit, which are used to convert AC power into stable DC power. The sound collection circuit 10, the touch button circuit 20, the switch control circuit 30 and the delayed broadcast circuit 40 can use existing circuits. For example, the switch control circuit 30 uses a single switch control circuit or a double switch control circuit, which are all within the protection scope of this patent.

[0023] Further, see Figure 1 and Figure 2 , the control signal delay circuit proposed in this embodiment, the touch key circuit 20 includes a touch key S2 and a first resistor R1 connected to the touch key S2. The switch control circuit 30 includes a first electronic control switch K1 and a second electronic control switch K2 connected to the first electronic control switch K1. In this embodiment, the first electronic control switch K1 adopts a PNP transistor, and the model of the PNP transistor is 9012. The emitter of the first electronic control switch K1 is connected to the collector of the second electronic control switch K2, the base of the first electronic control switch K1 is connected to the first resistor R1, the collector of the first electronic control switch K1 is connected to the base of the second electronic control switch K2, and the emitter of the second electronic control switch K2 is connected to the delay broadcast circuit 40. The second electronic control switch K2 adopts an NPN transistor, and the model of the NPN transistor is 9013. The control signal delay circuit proposed in this embodiment adopts the first electronic control switch K1 and the second electronic control switch K2 to form an electronic switch, and has a high degree of automation.

[0024] Preferably, see Figure 1 and Figure 2, the control signal delay circuit proposed in this embodiment, the delayed broadcast circuit 40 adopts an audio multivibrator. The audio multivibrator includes a second resistor R2, a third resistor R3, a first capacitor C2, a timing chip U1 and a speaker SP. The seventh pin of the timing chip U1 is connected to the switch control circuit 30 through the second resistor R2, one end of the third resistor is connected to the seventh pin of the timing chip U1, and the other end of the third resistor R3 is connected to the sixth pin of the timing chip U1; the sixth pin of the timing chip U1 is connected to the second pin of the timing chip U1 and grounded through the first capacitor C2; the third pin of the timing chip U1 is connected to the speaker SP through the second capacitor C5. The sound collection circuit 10 includes a microphone B. The model of the timing chip U1 is 555. The 555 timing chip U1 is often used for timers, pulse generators and oscillation circuits. The 555 timing chip U1 can be used as a delay device, trigger or oscillating element in the circuit.

[0025] like Figure 1 and Figure 2 As shown, the control signal delay circuit provided in this embodiment has the following working principle:

[0026] When a finger touches the touch button S2, the alternating current induced by the human body passes through the first resistor R1 to saturate and conduct the first electronic control switch K1 and the second electronic control switch K2. The two ends of the third capacitor C3 are immediately charged to about the power supply voltage +6V, so that the 555 timing chip U1 generates audio oscillation, and the oscillation pulse drives the speaker SP to emit a ringing sound through the second capacitor C5. The duration of the ringing sound is determined by the discharge time of the third capacitor C3.

[0027] When the finger of the person leaves the touch button S2, the ring tone frequency decreases as the voltage on the third capacitor C3 decreases, and the charging speed of the third capacitor C3 slows down. When the voltage on the third capacitor C3 drops to a threshold value that cannot charge the first capacitor C2 to reset, the 555 timing chip U1 stops oscillating, the third pin output end of the 555 timing chip U1 is high level, and the speaker SP stops making sound.

[0028] Compared with the prior art, the control signal delay circuit provided in this embodiment adopts a sound collection circuit, a touch button circuit, a switch control circuit and a delayed broadcast circuit. The input end of the switch control circuit is connected to the sound collection circuit and the touch button circuit respectively, and the output end of the switch control circuit is connected to the delayed broadcast circuit. The sound collection circuit is used to collect sound signals; the touch button circuit is used to send touch signals; the switch control circuit is used to receive the sound signals collected by the sound collection circuit and the touch signals sent by the switch control circuit, and control the delayed broadcast circuit to perform delayed broadcast. The control signal delay circuit provided in this embodiment has low manufacturing cost and high automation, and the timing time can be set in the delayed broadcast circuit. When the set timing time is reached, the sound is played to notify the homeowner in time, meeting the personalized customization needs.

[0029] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A control signal delay circuit, characterized in that: The invention comprises a sound collection circuit (10), a touch key circuit (20), a switch control circuit (30) and a delayed broadcast circuit (40), wherein an input end of the switch control circuit (30) is connected to the sound collection circuit (10) and the touch key circuit (20) respectively, and an output end of the switch control circuit (30) is connected to the delayed broadcast circuit (40).

2. The control signal delay circuit according to claim 1, characterized in that: The touch key circuit (20) comprises a touch key and a first resistor connected to the touch key.

3. The control signal delay circuit according to claim 2, characterized in that: The switch control circuit (30) comprises a first electronic control switch and a second electronic control switch connected to the first electronic control switch.

4. The control signal delay circuit according to claim 3, characterized in that: The first electronic control switch adopts a PNP transistor, and the model of the PNP transistor is 9012.

5. The control signal delay circuit according to claim 4, characterized in that: The second electronic control switch adopts an NPN transistor, and the model of the NPN transistor is 9013.

6. The control signal delay circuit according to claim 1, characterized in that: The delayed broadcast circuit (40) adopts an audio multivibrator.

7. The control signal delay circuit according to claim 6, characterized in that: The audio multivibrator comprises a second resistor, a third resistor, a first capacitor, a timing chip and a speaker; the seventh pin of the timing chip is connected to the switch control circuit (30) via the second resistor; one end of the third resistor is connected to the seventh pin of the timing chip; the other end of the third resistor is connected to the sixth pin of the timing chip; the sixth pin of the timing chip is connected to the second pin of the timing chip and is grounded via the first capacitor; and the third pin of the timing chip is connected to the speaker.

8. The control signal delay circuit according to claim 7, characterized in that: The model of the timing chip is 555.

9. The control signal delay circuit according to claim 1, characterized in that: The sound collection circuit (10) comprises a microphone.

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