A control circuit of an intelligent white noise sleep aid device

Abstract

The invention belongs to the technical field of sleep aid instruments, and particularly relates to a control circuit of an intelligent white noise sleep aid instrument, comprising a power supply circuit, a single chip computer, a WiFi circuit electrically connected to the single chip computer, a fan motor control circuit, an LED control circuit, a button control circuit, an audio circuit and an atomization control circuit. The overall circuit design is simple, and the use of a storage battery for power supply can save the use of dry batteries. Two fan motor control circuits, i.e., two gears, are provided, which are more practical. An atomization control circuit is provided, and the atomization effect achieved by combining with an LED lamp is more conducive to sleep. At the same time, the addition of a WiFi circuit facilitates the white noise sleep aid instrument to be controlled in combination with a mobile phone APP. The overall circuit structure is simple, and the manufacturing cost of the circuit board is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of sleep aid devices, and in particular relates to a control circuit of an intelligent white noise sleep aid device. Background Art

[0002] As people's living standards continue to improve, they pay more and more attention to their physical health, especially the increasing number of diseases caused by poor sleep quality and insomnia. According to surveys, people in all regions and different age groups have insomnia and the proportion is relatively high, especially those with high work pressure or men or women in menopause, they will have poor sleep quality. How to solve the problem of insomnia and poor sleep quality? Most people still choose traditional drug treatment, but the side effects are also relatively large.

[0003] The white noise sleep machine breaks the traditional conventional thinking. It uses a fan to create soothing air sounds through the principle of acoustic space, which can effectively cover up unnecessary noise, that is, by emitting uniform, stable white noise of the same frequency to shield or weaken and disperse other interfering noises, thereby reducing distractions, allowing people to relax and achieve deep sleep; and with the increasing improvement of the functions of the sleep machine, such as adding sleep-aiding LED lights and playing light music, on the one hand, the control circuit becomes complicated, and on the other hand, the operation of the white noise sleep machine becomes cumbersome. Summary of the invention

[0004] The purpose of the present invention is to provide a control circuit of an intelligent white noise sleep aid device to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides a control circuit of an intelligent white noise sleep aid instrument: including a power supply circuit, a single-chip microcomputer and a WiFi circuit, a fan motor control circuit, an LED control circuit, a button control circuit, an audio circuit and an atomization control circuit which are electrically connected to the single-chip microcomputer respectively. The power supply circuit adopts a charging chip of model SY7638, the input end of which is connected to a USB interface to provide a DC5V voltage, and the output end thereof charges a battery through a rectifier circuit; the single-chip microcomputer is model HR12944A, and the single-chip microcomputer is connected to a WiFi circuit via an SPI interface, and the WiFi circuit adopts a WiFi chip of model HRWE3S; the fan motor control circuit has two groups, They all include a switching element triode, which is electrically connected to the fan motor control pin of the single-chip microcomputer; the LED of the LED control circuit and the key of the key control circuit are electrically connected to the control pin of the single-chip microcomputer via a voltage-limiting resistor; the audio circuit uses an amplifier chip with model NY9A001A to be electrically connected to the speaker; the atomization control circuit includes a switching element MOS tube, a transformer, an inductor element and an atomizer sheet, the gate of the MOS tube is electrically connected to the atomization control pin of the single-chip microcomputer, its source is directly grounded, its drain is connected to one end of the primary winding of the transformer, the other end of the primary winding of the transformer is connected to a DC5V voltage, one end of the secondary winding of the transformer is directly grounded, and the other end is connected to the atomizer sheet via an inductor element.

[0006] As a further improvement of the control circuit of the intelligent white noise sleep aid device of the present invention: the charging chip of the power supply circuit leads out a feedback output voltage, which is used as a reference voltage for the working indicator light of the charging chip.

[0007] As a further improvement of the control circuit of the intelligent white noise sleep aid device of the present invention: the base of the transistor of the fan motor control circuit is connected to the fan motor control pin of the single-chip microcomputer, its emitter is grounded, its collector is connected to the DC5V voltage through the fan motor, and a reverse protection diode is connected between the DC5V voltage and the collector of the transistor.

[0008] As a further improvement of the control circuit of the intelligent white noise sleep aid device of the present invention: the atomization control pin of the single chip microcomputer is also electrically connected to a touch chip of model AP6022.

[0009] As a further improvement of the control circuit of the intelligent white noise sleep aid device of the present invention: the inductance value of the inductance element of the atomization control circuit is 3300uH, and the spray piece is a 110KHz spray piece.

[0010] The invention discloses a control circuit for an intelligent white noise sleep aid device, which has the following beneficial effects: a two-way fan motor control circuit is provided, namely two gears, which is more practical; an atomization control circuit is provided, and the atomization effect achieved by combining with an LED lamp is more conducive to sleep; and a WiFi circuit is added to facilitate the control of the white noise sleep aid device in combination with a mobile phone APP. The overall circuit structure is simple, which reduces the manufacturing cost of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The present invention provides a single chip microcomputer and an SPI interface circuit thereof;

[0012] Figure 2 The key control circuit and LED control circuit of the present invention;

[0013] Figure 3 The audio circuit of the present invention;

[0014] Figure 4 The WiFi circuit of the present invention;

[0015] Figure 5 The fan motor control circuit of the present invention;

[0016] Figure 6 The atomization control circuit of the present invention;

[0017] Figure 7 A power supply circuit of the present invention;

[0018] In the figure: 1. single chip microcomputer, 2. button control circuit, 3. LED control circuit, 4. audio circuit, 5. WiFi circuit, 6. fan motor control circuit, 7. atomization control circuit, 8. power supply circuit. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0020] The invention provides a control circuit for an intelligent white noise sleep aid, including a power supply circuit 8, a single-chip microcomputer 1, and a WiFi circuit 5, a fan motor control circuit 6, an LED control circuit 3, a button control circuit 2, an audio circuit 4, and an atomization control circuit 7, which are electrically connected to the single-chip microcomputer 1.

[0021] The power supply circuit 8 uses a charging chip of model SY7638, the input end of the charging chip is connected to the USB interface to provide a DC5V voltage, and the output end thereof charges the battery through a rectifier circuit, preferably a 4.8V battery pack, and the VOUT end of the SY7638 charging chip leads to a feedback output voltage, which is connected to the base of a triode Q1 of model 2N3904, the collector of the triode Q1 is connected to the DC5V voltage, and the emitter of the triode Q1 is connected to the working indicator light of the charging chip, such as Figure 7 As shown; the model of the single chip microcomputer 1 is HR12944A, and the single chip microcomputer is connected to the WiFi circuit via the SPI interface, such as Figure 1 As shown, specifically, the WiFi circuit 5 uses a WiFi chip of model HRWE3S, the TXD pin of the WiFi chip is electrically connected to the PB3 pin of the single-chip microcomputer, and the RXD pin of the WiFi chip is electrically connected to the PB2 pin of the single-chip microcomputer, such as Figure 4 As shown; the LED of the LED control circuit 3 and the key of the key control circuit 2 are electrically connected to the control pins of the microcontroller via voltage limiting resistors, such as Figure 2 As shown; the audio circuit 4 uses an amplifier chip of model NY9A001A to be electrically connected to the speaker. Specifically, the PP1 and PP2 pins of the baffle are connected to the input end of the NY9A001A amplifier chip and the speaker, such as Figure 3 As shown, it is used to play light music to help sleep; the fan motor control circuit 6 has two groups, both of which include a switching element triode, which is electrically connected to the fan motor control pin of the single-chip microcomputer, specifically, as Figure 5 As shown, the base of the transistor of the fan motor control circuit 6 is connected to the fan motor control pin of the single-chip microcomputer, the emitter is grounded, the collector is connected to the DC5V voltage via the fan motor, and a reverse protection diode is connected between the DC5V voltage and the collector of the transistor. When the fan motor control pin of the single-chip microcomputer outputs a low level, the transistor is not turned on and the fan motor does not rotate; when the fan motor control pin of the single-chip microcomputer outputs a high level, the transistor is turned on, the current passes through VCC, the fan motor, and the transistor to the ground, and the fan motor rotates. And the single chip computer 1 is electrically connected to the two-way fan motor control circuit 6, which is used as the two gears of the fan motor, making the white noise sleep aid function more humane; the atomization control circuit 7 includes a switch element MOS tube, a transformer, an inductor element and an atomizer sheet, the gate of the MOS tube is electrically connected to the atomization control pin of the single chip computer, its source is directly grounded, its drain is connected to one end of the primary winding of the transformer, the other end of the primary winding of the transformer is connected to the DC5V voltage, one end of the secondary winding of the transformer is directly grounded, and the other end is connected to the atomizer sheet through the inductor element, such as Figure 6 As shown, the atomizer combined with LED can create a good atomization effect, which is more conducive to sleep.

[0022] The overall circuit design is simple, which reduces the manufacturing cost of the circuit board. The white noise sleep aid device is powered by a battery, which can save the use of dry batteries. At the same time, adding a WiFi circuit is more conducive to the intelligent control of the white noise sleep aid device, and the operation is more convenient.

[0023] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A control circuit of an intelligent white noise sleep aid device, characterized in that: The invention comprises a power supply circuit, a single-chip computer, and a WiFi circuit, a fan motor control circuit, an LED control circuit, a button control circuit, an audio circuit and an atomization control circuit which are electrically connected to the single-chip computer respectively. The power supply circuit adopts a charging chip of model SY7638. The input end of the charging chip is connected to a USB interface to provide a DC5V voltage, and the output end thereof charges the battery through a rectifier circuit. The single-chip computer is model HR12944A, and the single-chip computer is connected to the WiFi circuit through an SPI interface. The WiFi circuit adopts a WiFi chip of model HRWE3S. The fan motor control circuit has two groups, both of which include a switching element triode. The triode The tube is electrically connected to the fan motor control pin of the single-chip microcomputer; the LED of the LED control circuit and the key of the key control circuit are electrically connected to the control pin of the single-chip microcomputer via a voltage-limiting resistor; the audio circuit adopts an amplifier chip of model NY9A001A to be electrically connected to the speaker; the atomization control circuit includes a switching element MOS tube, a transformer, an inductor element and an atomizer sheet, the gate of the MOS tube is electrically connected to the atomization control pin of the single-chip microcomputer, its source is directly grounded, its drain is connected to one end of the primary winding of the transformer, the other end of the primary winding of the transformer is connected to a DC5V voltage, one end of the secondary winding of the transformer is directly grounded, and the other end is connected to the atomizer sheet via an inductor element; The charging chip of the power supply circuit leads out a feedback output voltage, which is used as a reference voltage for the working indicator light of the charging chip; The transistor base of the fan motor control circuit is connected to the fan motor control pin of the single chip microcomputer, the emitter is grounded, the collector is connected to the DC5V voltage through the fan motor, and a reverse protection diode is connected between the DC5V voltage and the collector of the transistor.

2. The control circuit of the intelligent white noise sleep aid device according to claim 1, characterized in that: The atomization control pin of the single chip microcomputer is also electrically connected to a touch chip of model AP6022.

3. The control circuit of the intelligent white noise sleep aid device according to claim 1, characterized in that: The inductance value of the inductance element of the atomization control circuit is 3300uH, and the spray piece is a 110KHz spray piece.

Images