CN210488707U - Wireless doorbell with low energy consumption - Google Patents

Abstract

The utility model relates to a wireless doorbell with low energy consumption, which is characterized in that the wireless doorbell comprises a doorbell emitter and a doorbell receiver; the signals transmitted by the doorbell transmitter comprise lead code signals and doorbell data signals; the doorbell receiver comprises a high-frequency receiving module, an MCU control circuit, a doorbell output circuit and a power supply circuit; the high-frequency receiving module adopts a duty ratio working mode; when the high-frequency receiving module finds more than three continuous square wave pulse signals in the lead code signal in the working time, the high-frequency receiving module automatically increases the working time and awakens the MCU control circuit to work on the basis of the working time; when the continuous square wave pulse signals found in the working time do not reach the number, the high-frequency receiving module works according to the working mode of the original duty ratio, the high-frequency receiving module does not output the awakening voltage, and the MCU control circuit is in a dormant state, so that the purpose of saving electricity is achieved. Its advantage does: the wireless doorbell receiver has the advantages that the power consumption in working is low, the wireless doorbell receiver can be matched with a doorbell emitter powered by self-electricity and a battery for use, the adaptability is good, and the service life of the battery can last for more than one year.

Description

Wireless doorbell with low energy consumption

Technical Field

The utility model relates to a wireless doorbell that power consumption is low.

Background

Currently, wireless doorbell systems consist of one or more wireless signaling doorbell transmitters and one or more wireless receiving ringing devices. When a guest visits, the guest presses a button of a doorbell emitter, the doorbell emitter emits a group of wireless signals, a doorbell receiver decodes the signals after receiving the wireless signals, whether the signals are emitted by the paired doorbell emitter or not is confirmed, and if the signals are emitted by the paired doorbell emitter, the doorbell emits voice to prompt an owner to visit the guest.

The self-generating device is applied to the wireless doorbell as a novel environment-friendly technology, the doorbell emitter powered by self-generating electricity does not need a battery, the doorbell emitter is green and environment-friendly and convenient to use, a circuit of the doorbell emitter is easy to carry out moisture-proof treatment and can be used under a high humidity condition, and the doorbell emitter can be used in an environment with the temperature of-40 ℃ to 85 ℃ because the doorbell emitter does not contain the battery.

Because the self-generating power supply technology has the advantages that the generated electric quantity is small, the number of frames of signals sent by the doorbell transmitter is limited, the doorbell receiver is required to always keep a signal receiving state, and therefore the doorbell transmitter with the self-generating device can only be matched with the alternating-current wireless receiver for use basically; if battery powered doorbell receiver pairs with from power generation powered doorbell transmitter and uses, doorbell receiver needs to remain operating condition all the time, and is very power consumptive like this, needs often to change the battery, just can keep wireless doorbell receiver's operating condition, hardly pairs with spontaneous power supply doorbell transmitter and uses, and the matching nature of product is not good moreover.

To sum up, battery powered doorbell receiver is difficult to mate the use with the doorbell transmitter that supplies power from the electricity generation, and the product matching nature is not good moreover.

Disclosure of Invention

The utility model aims at overcoming prior art not enough and providing a wireless doorbell that power consumption is low, this doorbell receiver operating current is little, and the doorbell receiver can not only match the use with the doorbell transmitter from the electricity generation power supply, also can match the use with the doorbell transmitter of battery powered, and doorbell receiver product suitability is good, and power consumption is little, and battery live time reaches more than one year.

In order to achieve the purpose, the technical scheme of the utility model is realized in such a way that the wireless doorbell has low energy consumption and is characterized by comprising a doorbell emitter and a doorbell receiver; the doorbell transmitter transmits signals including a lead code signal and a doorbell data signal, wherein the lead code signal is a series of continuous square wave pulse signals; the doorbell receiver comprises a high-frequency receiving module, an MCU control circuit, a doorbell output circuit and a power supply circuit, wherein the power supply circuit provides direct-current working voltage for the high-frequency receiving module, the MCU control circuit and the doorbell output circuit;

the high-frequency receiving module adopts a duty ratio working mode, the working time of the high-frequency receiving module is t 1, the range of t 1 is 0.5-3ms, the sleep time is t2, and the range of t2 is 10-80 ms; the MCU control circuit (3) is awakened by the high-frequency receiving module (2) to enter a working state, and the MCU control circuit (3) enters a dormant state after data processing is finished;

when the high-frequency receiving module finds more than three continuous square wave pulse signals in the lead code signal in the working time t 1, the high-frequency receiving module outputs a wake-up signal, the working time t 3 is automatically increased on the basis of the working time t 1, the time t 3 is more than or equal to the time when the doorbell transmitter transmits the lead code and more than one group of doorbell data signals, from t 1, the high-frequency receiving module receives and demodulates the doorbell data signals, and the wake-up signal output by the high-frequency receiving module wakes up the MCU control circuit. After the MCU control circuit is awakened, the MCU control circuit receives and decodes the demodulated data signal output by the high-frequency receiving module, the MCU control circuit matches the decoded doorbell data signal with a doorbell data signal pre-stored in the MCU control circuit, if the matching is successful, the MCU control circuit respectively outputs a clock signal and a data signal to the doorbell output circuit, the doorbell output circuit respectively receives the clock signal and the data signal and then outputs a feedback signal to the MCU control circuit, at the moment, the doorbell output circuit drives the doorbell to work, and if the matching is unsuccessful, the MCU control circuit does not output the doorbell data signal;

when the continuous square wave pulse signals in the lead code signals searched by the high-frequency receiving module in the working time t 1 do not reach the number, the high-frequency receiving module works according to the working mode of the original duty ratio, the wake-up signal output end of the high-frequency receiving module does not output wake-up voltage in the state, and the MCU control circuit sleeps to achieve the purpose of saving electricity.

In the technical scheme, the high-frequency receiving module comprises a crystal oscillator, a wireless radio frequency receiving chip, a receiving antenna, a first inductor, a second capacitor, a fifth capacitor and a second resistor; the type of the wireless radio frequency receiving chip is CMT2217B, the wireless radio frequency receiving chip has sixteen pins, 2 pins of the wireless radio frequency receiving chip are electrically connected with one end of the second resistor, 5 pins of the wireless radio frequency receiving chip are data output ends, 5 pins of the wireless radio frequency receiving chip are electrically connected with a data input end of the MCU control circuit, 6 pins of the wireless radio frequency receiving chip are awakening signal output ends, 6 pins of the wireless radio frequency receiving chip are electrically connected with an awakening signal input end of the MCU control circuit, 8 pins of the wireless radio frequency receiving chip are grounded through a crystal oscillator, 13 pins of the wireless radio frequency receiving chip are grounded, 14 pins of the wireless radio frequency receiving chip are respectively electrically connected with one end of the second capacitor and one end of the first inductor, and 15 pins of the wireless radio frequency receiving chip are grounded; the output end of the power supply circuit is respectively and electrically connected with a pin 16 of the wireless radio frequency receiving chip, one end of a fourth capacitor, one end of a fifth capacitor and the other end of the second resistor; the other end of the second capacitor, the other end of the fourth capacitor and the other end of the fifth capacitor are all grounded, the receiving antenna receives a wireless signal transmitted by the transmitter, the output end of the receiving antenna is electrically connected with one end of the second inductor, one end of the third capacitor and the other end of the first inductor respectively, and the other end of the second inductor and the other end of the third capacitor are both grounded.

In the technical scheme, the MCU control circuit comprises a singlechip, a first switch, a second switch, a third switch, a sixth capacitor and a third resistor; the type of the single chip microcomputer is CSU8RF2112, the single chip microcomputer has 14 pins, 1 pin of the single chip microcomputer is electrically connected with a data signal input end of a doorbell output circuit, 2 pins of the single chip microcomputer is electrically connected with a clock signal input end of the doorbell output circuit, 3 pins of the single chip microcomputer are electrically connected with a feedback signal output end of the doorbell output circuit, 4 pins of the single chip microcomputer are respectively electrically connected with an output end of a power supply circuit and one end of a sixth capacitor, 5 pins of the single chip microcomputer are grounded through a first switch, 6 pins of the single chip microcomputer are grounded through a second switch, 7 pins of the single chip microcomputer are grounded through a third switch, 9 pins of the single chip microcomputer are electrically connected with 5 pins of a wireless radio frequency receiving chip, 10 pins of the single chip microcomputer are electrically connected with 6 pins of the wireless radio frequency receiving chip, 11 pins of the.

In the technical scheme, the power supply circuit comprises a first diode, a battery, a first resistor, a three-terminal voltage-stabilizing block, an electrolytic capacitor and a first capacitor; the input end of the three-terminal voltage-stabilizing block is respectively and electrically connected with the cathode of the first diode and the power supply end of the doorbell output circuit, the ground wire end of the three-terminal voltage-stabilizing block is grounded, and the output end of the three-terminal voltage-stabilizing block is respectively and electrically connected with the power supply end of the high-frequency receiving module, the power supply end of the MCU control circuit, the positive electrode end of the electrolytic capacitor and one end of the first capacitor; the negative electrode end of the electrolytic capacitor is grounded,

the other end of the first capacitor is grounded, and the anode of the battery is electrically connected with the anode of the second diode through the first resistor.

Compared with the prior art, the utility model the advantage do: the operating current of wireless doorbell receiver is little, and wireless doorbell receiver can not only match with the doorbell transmitter from the electricity generation power supply and use, also can match with the transmitter of battery powered and use, and the suitability is good, and power consumption is little, and the battery live time reaches more than a year.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

fig. 2 is a schematic diagram of the operation of the high-frequency receiving module of the present invention;

fig. 3 is a schematic circuit diagram of the power supply circuit of the present invention;

fig. 4 is a schematic circuit diagram of the high-frequency receiving module of the present invention;

FIG. 5 is a schematic circuit diagram of the MCU control circuit and the integrating circuit of the present invention;

fig. 6 is a schematic circuit diagram of the driving switch circuit and the doorbell output circuit of the present invention.

Note: point a in fig. 5 is electrically connected to point a in fig. 6, point b in fig. 5 is electrically connected to point b in fig. 6, and point c in fig. 5 is electrically connected to point c in fig. 6.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, the terms "first" to "seventeenth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, it is a wireless doorbell with low energy consumption, which includes a doorbell transmitter 1 and a doorbell receiver; the doorbell transmitter 1 transmits signals including a lead code signal and a doorbell data signal, wherein the lead code signal is a series of continuous square wave pulse signals; the doorbell receiver comprises a high-frequency receiving module 2, an MCU control circuit 3, a doorbell output circuit 4 and a power supply circuit 5, wherein the power supply circuit 5 provides direct-current working voltage for the high-frequency receiving module 2, the MCU control circuit 3 and the doorbell output circuit 4; the wake-up signal output end of the high-frequency receiving module 2 is electrically connected with the wake-up signal input end of the MCU control circuit 3, the data output end of the high-frequency receiving module 2 is electrically connected with the data input end of the MCU control circuit 3, and the MCU control circuit 3 is electrically connected with the doorbell output circuit 4 through a data bus;

the high frequency receiving module 2 adopts a duty ratio working mode, as shown in fig. 2, the working time of the high frequency receiving module 2 is t 1, t 1 is 0.8ms, the sleep time is t2, and t2 is 28ms, that is, the high frequency receiving module 2 operates for t 1, then sleeps for t2, operates for t 1 and then sleeps for t2, and circulates; t 1 and t2 can be determined according to actual conditions, t 1 can be 0.5 ms, 0.6 ms, 0.7 ms, 1 ms, 2 ms or 3ms, namely t 1 can be selected randomly within 0.5-3ms, t2 can be 10 ms, 20 ms, 30 ms, 40 ms or 80ms 28ms, namely t2 can be selected randomly within 10-80 ms; the MCU control circuit 3 is awakened by the high-frequency receiving module 2 to enter a working state, and the MCU control circuit 3 enters a dormant state after data processing is finished;

when the high-frequency receiving module 2 finds eight continuous square wave pulse signals in the lead code signal within the working time t 1, the high-frequency receiving module 2 outputs a wake-up signal, and automatically increases the working time t 3 on the basis of the working time t 1, wherein t 3 is equal to the time when the transmitter transmits the lead code and a group of half doorbell data signals, or t 3 is equal to the time when the transmitter transmits the lead code and two or three groups of doorbell data signals according to the actual situation; from t 1, the high-frequency receiving module receives and demodulates the doorbell data signal, and the wake-up signal output end of the high-frequency receiving module 2 outputs a wake-up signal to enable the MCU control circuit 3 to enter a working state; when the MCU control circuit 3 is awakened, the doorbell data output end of the high-frequency receiving module 2 outputs the demodulated doorbell data signal to the MCU control circuit 3, the MCU control circuit 3 matches the decoded doorbell data signal with a doorbell data signal pre-stored in the MCU control circuit 3, if the matching is successful, the MCU control circuit 3 respectively outputs a clock signal and the decoded doorbell data signal to the doorbell output circuit 4, the doorbell output circuit 4 outputs a feedback signal to the MCU control circuit 3, at the moment, the doorbell output circuit 4 drives a doorbell to work, and if the matching is unsuccessful, the MCU control circuit 3 does not output the doorbell data signal;

when the number of the continuous pulse signals in the preamble signal found by the high-frequency receiving module 2 in the working time t 1 is less than eight, the high-frequency receiving module 2 works according to the working mode of the original duty ratio, at this time, the wake-up signal output end of the high-frequency receiving module 2 does not output the wake-up signal, and the MCU control circuit 3 sleeps, thereby saving power.

In this embodiment, the number of the continuous square wave pulses in the preamble signal may be determined according to actual situations, and may be three continuous square wave pulses, or four, five or more continuous square wave pulses, where the number of the square wave pulses is large, and the probability that the high frequency receiving module 2 is caused by the spurious signal to extend the working time and wake up the MCU control circuit 3 is smaller.

When in work, a user presses the doorbell emitter 1, the doorbell emitter 1 sends a signal to the high-frequency receiving module 2 through the RF antenna, the high-frequency receiving module 2 works in a duty ratio working mode, during the working period, if the high frequency receiving module 2 finds eight continuous pulse signals in the lead code signal of the doorbell transmitter 1, the high frequency receiving module 2 outputs a wake-up signal, the working time is automatically prolonged to be the set extension time t 3, the high-frequency receiving module 2 receives and demodulates doorbell data signals transmitted by the transmitter 1, the MCU control circuit 3 is awakened to work and decodes the demodulated doorbell data signals output by the high-frequency receiving module 2, the MCU control circuit 3 matches the doorbell data signals with prestored doorbell data signals, the doorbell output circuit 4 is driven to be successfully matched, the matching is unsuccessful, and the MCU control circuit 3 does not output doorbell data signals; if the high-frequency receiving module 2 does not find eight continuous pulse signals in the lead code signal of the transmitter 1 in the working period, the high-frequency receiving module 2 does not output a wake-up signal, and the MCU control circuit 3 sleeps; the high-frequency receiving module 2 works for 0.8ms, is in a dormant state for 28ms, has long standby working time of a battery, can be matched with a common battery-powered doorbell emitter for use, and can also be matched with a self-generating doorbell emitter for use, so that the product has good adaptation performance.

In this embodiment:

1. the high-frequency module works in a duty ratio mode, enters a sleep mode after the working time t 1 is 0.8mS, automatically wakes up after the sleep time t2 is 28mS, the normal working current of the high-frequency module is 3.8mA, the sleep current is less than 1uA (neglected), the starting current is 2mA when the high-frequency module wakes up from the sleep mode, and the starting time is 0.4 mS;

2. other circuit circuits, such as an MCU control circuit, a doorbell output circuit and the like have low working current in a standby state and can be ignored.

The calculation formula of the power consumption is as follows: (3.8mA 0.8mS +2mA 0.4 mS)/(28 mS +0.4mS +0.8 mS) ≈ 0.13 mA.

In this embodiment, as shown in fig. 4, the high frequency receiving module 2 includes a crystal oscillator X1, a wireless rf receiving chip U2, a receiving antenna ANT, a first inductor L1, a second inductor L2, second to fifth capacitors C2 to C5, and a second resistor R2; the model of the wireless radio frequency receiving chip U2 is CMT CMT2217B, the number of the pins is sixteen, pin 2 of the wireless radio frequency receiving chip U2 is electrically connected with one end of a second resistor R2, pin 5 of the wireless radio frequency receiving chip U2 is a data output end, pin 5 of the wireless radio frequency receiving chip U2 is electrically connected with a data input end of the MCU control circuit 3, pin 6 of the wireless radio frequency receiving chip U2 is a wake-up signal output end, pin 6 of the wireless radio frequency receiving chip U2 is electrically connected with a wake-up input end of the MCU control circuit 3, pin 8 of the wireless radio frequency receiving chip U2 is grounded through a crystal oscillator X1, pin 13 of the wireless radio frequency receiving chip U2 is grounded, pin 14 of the wireless radio frequency receiving chip U2 is electrically connected with one end of a second capacitor C2 and one end of a first inductor L1 respectively, and pin 15 of the wireless radio frequency receiving chip U2 is; the output end of the power supply circuit 5 is respectively and electrically connected with a pin 16 of the wireless radio frequency receiving chip U2, one end of a fourth capacitor C4, one end of a fifth capacitor C5 and the other end of a second resistor R2; the other end of the second capacitor C2, the other end of the fourth capacitor C4 and the other end of the fifth capacitor C5 are all grounded, the receiving antenna ANT receives a wireless signal transmitted by the transmitter 1, the output end of the receiving antenna ANT is electrically connected with one end of a second inductor L2, one end of a third capacitor C3 and the other end of a first inductor L1, and the other end of the second inductor L2 and the other end of the third capacitor C3 are all grounded.

When the wireless radio frequency receiving chip U2 works in a duty ratio working mode, when eight continuous square wave pulse signals in a lead code signal of the transmitter 1 are found by a pin 14 of the wireless radio frequency receiving chip U2 in a working period, the wireless radio frequency receiving chip U2 outputs a wake-up signal, the working time is automatically prolonged to set extended time t 3, a pin 6 of the wireless radio frequency receiving chip U2 outputs the wake-up signal at the moment, the MCU control circuit 3 is woken up, the MCU control circuit 3 works and decodes a data signal output by a pin 5 of the wireless radio frequency receiving chip U2 and transmitted by the transmitter 1, the MCU control circuit 3 matches a doorbell data signal with a prestored doorbell data signal, and the doorbell output circuit 4 is driven by successful matching; if the 14 pins of the wireless radio frequency receiving chip U2 do not find eight continuous square wave pulse signals in the preamble signal of the transmitter 1 during the working period, the 6 pins of the wireless radio frequency receiving chip U2 do not output the wake-up signal, and the MCU control circuit 3 sleeps; the working current is small, and the standby working time of the battery is long.

In this embodiment, as shown in fig. 5, the MCU control circuit 3 includes a single chip microcomputer U3, a first switch SW1, a second switch SW2, a third switch SW3, a sixth capacitor C6 and a third resistor R3; the model of the singlechip U3 is CSU8RF2112, which has 14 feet in total, wherein 1 foot of the singlechip U3 is electrically connected with a data signal input end of a doorbell output circuit 4, 2 feet of the singlechip U3 is electrically connected with a clock signal input end of the doorbell output circuit 4, 3 feet of the singlechip U3 is electrically connected with a feedback signal output end of the doorbell output circuit 4, 4 feet of the singlechip U3 are respectively electrically connected with an output end of a power supply circuit 5 and one end of a sixth capacitor C6, 5 feet of the singlechip U3 are grounded through a first switch SW1, 6 feet of the singlechip U3 are grounded through a second switch SW2, 7 feet of the singlechip U3 are grounded through a third switch SW3, 9 feet of the singlechip U3 are input ends of doorbell data, 9 feet of the singlechip U3 are electrically connected with 5 feet of a wireless radio frequency receiving chip U2, 10 feet of the singlechip U3 are input ends of wake-up signals, and 10 feet of the singlechip U3 are electrically connected with 6 feet of the wireless radio frequency receiving chip U2, the pin 11 of the singlechip U3 is grounded, and the pin 14 of the singlechip U3 is grounded through a third resistor R3.

When the doorbell works, when a wake-up voltage U is available at a pin 10 of the single chip microcomputer U3, the single chip microcomputer U3 decodes a data signal of a pin 5 received by a pin 9 from the wireless radio frequency receiving chip U2, the single chip microcomputer U3 matches the doorbell data signal with the doorbell data signal prestored in the single chip microcomputer U3, if the matching is successful, a pin 1 of the single chip microcomputer U3 outputs a clock signal to the doorbell output circuit 4, a pin 2 of the single chip microcomputer U3 outputs the doorbell data signal to the doorbell output circuit 4, the doorbell output circuit 4 outputs a feedback signal to a pin 3 of the single chip microcomputer U3 after receiving the clock signal and the decoded doorbell data signal respectively, at the moment, the doorbell output circuit 4 drives the doorbell to work, if the matching is unsuccessful, the single chip microcomputer U3 does not work. If the 10 feet of the single chip microcomputer U3 do not receive the awakening signal, the single chip microcomputer U3 sleeps.

In this embodiment, as shown in fig. 6, in order to save more energy, when the MCU control circuit 3 does not operate, the MCU control circuit 3 is effectively isolated from the doorbell output circuit 4, and a driving switch circuit 7 is provided between the MCU control circuit 3 and the doorbell output circuit 4; the driving switch circuit 7 comprises a first triode Q1, a second triode Q2, a third triode Q3 and sixth to twelfth resistors R6 to R12; the base electrode of the first triode Q1 is electrically connected with the pin 1 of the singlechip U3 through a seventh resistor R7, the collector electrode of the first triode Q1 is electrically connected with the data signal input end of the doorbell output circuit 4 and one end of a sixth resistor R6 respectively, and the emitter electrode of the first triode Q1 is grounded; the base electrode of the second triode Q2 is electrically connected with the pin 2 of the singlechip U3 through a ninth resistor R9, the collector electrode of the second triode Q2 is electrically connected with the clock signal input end of the doorbell output circuit 4 and one end of an eighth resistor R8 respectively, and the emitter electrode of the second triode Q2 is grounded; the base electrode of the third triode Q1 is electrically connected with the feedback signal output end of the doorbell output circuit 4 through a twelfth resistor R12, the collector electrode of the third triode Q3 is electrically connected with one end of an eleventh resistor R11 and one end of a tenth resistor R10 respectively, and the emitter electrode of the third triode Q3 is grounded; the other end of the tenth resistor R10 is electrically connected with pin 3 of the singlechip U3, the other end of the eleventh resistor R11 is electrically connected with the output end of the power supply circuit 5, and the other end of the eighth resistor R8 is electrically connected with the other end of the sixth resistor R6 and the output end of the power supply circuit 5 respectively.

In this embodiment, as shown in fig. 3, the power supply circuit 5 includes a first diode D1, a battery E, a first resistor R1, a three-terminal regulator block U1, an electrolytic capacitor E1, and a first capacitor C1; the input end of the three-terminal voltage-stabilizing block U1 is respectively and electrically connected with the cathode of the first diode D1 and the power supply end of the doorbell output circuit 4, the ground wire end of the three-terminal voltage-stabilizing block U1 is grounded, and the output end of the three-terminal voltage-stabilizing block U1 is respectively and electrically connected with the power supply end of the high-frequency receiving module 2, the power supply end of the MCU control circuit 3, the positive electrode end of the electrolytic capacitor E1 and one end of the first capacitor C1; the negative terminal of the electrolytic capacitor E1 is grounded, and the first power

The other end of the capacitor C1 is grounded, and the anode of the battery E is electrically connected to the anode of the second diode D2 through the first resistor R1.

Note: the utility model discloses in, because doorbell emitter 1 and doorbell output circuit 4 are prior art, consequently do not expand the description to doorbell emitter 1 and doorbell output circuit 4.

The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention.

Claims (2)

1. A wireless doorbell with low energy consumption is characterized by comprising a doorbell transmitter (1) and a doorbell receiver; the doorbell receiver comprises a high-frequency receiving module (2), an MCU control circuit (3), a doorbell output circuit (4) and a power supply circuit (5), wherein the power supply circuit (5) provides direct-current working voltage for the high-frequency receiving module (2), the MCU control circuit (3) and the doorbell output circuit (4);

the high-frequency receiving module (2) comprises a crystal oscillator (X1), a wireless radio frequency receiving chip (U2), a receiving Antenna (ANT), a first inductor (L1), a second inductor (L2), second capacitors (C2) to fifth capacitors (C5) and a second resistor (R2); the model of the wireless radio frequency receiving chip (U2) is CMT2217B, the number of the pins is sixteen, 2 pins of the wireless radio frequency receiving chip (U2) are electrically connected with one end of a second resistor (R2), 5 pins of the wireless radio frequency receiving chip (U2) are data output ends, 5 pins of the wireless radio frequency receiving chip (U2) are electrically connected with a data input end of the MCU control circuit (3), 6 pins of the wireless radio frequency receiving chip (U2) are wake-up signal output ends, 6 pins of the wireless radio frequency receiving chip (U2) are electrically connected with a wake-up input end of the MCU control circuit (3), 8 pins of the wireless radio frequency receiving chip (U2) are grounded through a crystal oscillator (X1), 13 pins of the wireless radio frequency receiving chip (U2) are grounded, 14 pins of the wireless radio frequency receiving chip (U2) are respectively and electrically connected with one end of a second capacitor (C2) and one end of a first inductor (L1), and 15 pins of the wireless radio frequency receiving chip (U2) are grounded; the output end of the power supply circuit (5) is respectively and electrically connected with a pin 16 of a wireless radio frequency receiving chip (U2), one end of a fourth capacitor (C4), one end of a fifth capacitor (C5) and the other end of a second resistor (R2); the other end of the second capacitor (C2), the other end of the fourth capacitor (C4) and the other end of the fifth capacitor (C5) are all grounded, the receiving Antenna (ANT) receives a wireless signal transmitted by the doorbell transmitter (1), the output end of the receiving Antenna (ANT) is electrically connected with one end of the second inductor (L2), one end of the third capacitor (C3) and the other end of the first inductor (L1), and the other end of the second inductor (L2) and the other end of the third capacitor (C3) are all grounded;

the MCU control circuit (3) comprises a single chip microcomputer (U3), a first switch (SW 1), a second switch (SW 2), a third switch (SW 3), a sixth capacitor (C6) and a third resistor (R3); the type of the single chip microcomputer (U3) is CSU8RF2112, the single chip microcomputer (U3) has 14 pins in total, 1 pin of the single chip microcomputer (U3) is electrically connected with a data signal input end of the doorbell output circuit (4), 2 pins of the single chip microcomputer (U3) are electrically connected with a clock signal input end of the doorbell output circuit (4), 3 pins of the single chip microcomputer (U3) are electrically connected with a feedback signal output end of the doorbell output circuit (4), 4 pins of the single chip microcomputer (U3) are respectively electrically connected with an output end of the power supply circuit (5) and one end of a sixth capacitor (C6), 5 pins of the single chip microcomputer (U3) are grounded through a first switch (SW 1), 6 pins of the single chip microcomputer (U3) are grounded through a second switch (SW 2), 7 pins of the single chip microcomputer (U3) are grounded through a third switch (SW 3), 9 pins of the single chip (U3) are electrically connected with 5 pins of a wireless radio frequency receiving chip (U2), and a single chip (U3) is electrically connected with a wireless radio frequency receiving chip (U2), the pin 11 of the singlechip (U3) is grounded, and the pin 14 of the singlechip (U3) is grounded through a third resistor (R3).

2. The wireless doorbell of claim 1, characterized in that the power supply circuit (5) comprises a first diode (D1), a battery (E), a first resistor (R1), a three-terminal regulator block (U1), an electrolytic capacitor (E1) and a first capacitor (C1); the input end of the three-terminal voltage stabilizing block (U1) is respectively and electrically connected with the cathode of the first diode (D1) and the power supply end of the doorbell output circuit (4), the ground wire end of the three-terminal voltage stabilizing block (U1) is grounded, and the output end of the three-terminal voltage stabilizing block (U1) is respectively and electrically connected with the power supply end of the high-frequency receiving module (2), the power supply end of the MCU control circuit (3), the positive electrode end of the electrolytic capacitor (E1) and one end of the first capacitor (C1); the negative terminal of the electrolytic capacitor (E1) is grounded, the other terminal of the first capacitor (C1) is grounded, and the positive terminal of the battery (E) is electrically connected with the anode of a second diode (D2) through a first resistor (R1).

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