CN106530541A - Delayed sound-and-light music doorbell - Google Patents

Abstract

The invention provides a time-delayed acousto-optic music doorbell, whose circuit includes a control circuit and an acousto-optic circuit, wherein the control circuit is constructed by using a time base circuit NE555 chip, and the acousto-optic circuit is constructed by using a music flash integrated circuit HFC1531 module. When in use, just press the button once, and the doorbell can continue to respond for a period of time. It is no longer necessary to press the button for a long time to control the ringing of the doorbell. It is very convenient, and the ringtone is a wonderful music ringtone, and it is also equipped with The strength of the doorbell music is prompted by flashing LED lights, which can not only facilitate the identification of the elderly with poor hearing, but also have a dazzling sound and light decoration effect.

Description

A time-delay sound and light music doorbell

technical field

The invention relates to a doorbell, in particular to a time-delayed acousto-optic music doorbell, which belongs to the field of electronic technology.

Background technique

The door of general family is all equipped with doorbell, common doorbell is to be controlled by being arranged on the button outside the door, after the people outside the door presses button, doorbell rings, releases button then doorbell stops sounding. Usually, in order to allow people in the house to hear the doorbell, people outside the door need to press the doorbell button for a long time, which is very inconvenient to operate. Therefore, we hope to add a delay circuit to the doorbell, so that the doorbell can continue to respond for a period of time just by pressing the doorbell once. In addition, the ringtone of an ordinary doorbell is generally just a simple ding-dong sound. We hope to transform it into a nice music doorbell, and we hope that when the bell rings, there will be a flashing light to remind you of the strength of the doorbell music, so that It can not only facilitate the identification of the elderly with poor hearing, but also have a dazzling sound and light decoration effect.

Contents of the invention

The purpose of the present invention is to provide a time-delayed sound and light music doorbell to solve the problems existing in the existing doorbells, such as the need for people to press the button for a long time to control the ringing, monotonous ringing, and only sound without dazzling light prompts when the ringing.

Concrete technical scheme of the present invention is:

A time-delay sound and light music doorbell, the circuit of which uses 220V mains electricity to be stepped down by transformer T1, bridge rectified by diodes D1~D4, filtered by capacitor C1, and a DC 9V power supply is formed at the positive and negative ends of capacitor C1 respectively The terminal and the ground terminal supply power to the control circuit and the sound and light circuit of the subsequent stage.

The control circuit is constructed using a time base circuit NE555 chip, the 9V power supply is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 2 of the NE555 chip and one end of the button K, and the other end of the button K is grounded; the NE555 chip 4. Pin 8 is connected to the 9V power supply, pin 6 and 7 are connected to one end of the adjustable resistor RP, the adjustment end and the positive pole of the capacitor C2, the other end of the adjustable resistor RP is connected to the 9V power supply, and the negative pole of the capacitor C2 is grounded; pin 1 of the NE555 chip Ground, 5 pins are connected in series with capacitor C3 and then grounded, 3 pins are output to the sound and light circuit.

The acousto-optic circuit is constructed by using the music flash integrated circuit HFC1531 module, one end of the resistor R2 is connected to pin 3 of the control circuit NE555 chip, the other end of the resistor R2 is connected to the VDD pin and TRIG pin of the HFC1531 module and the negative pole of the Zener diode DZ, The anode of the Zener diode DZ is grounded, the light-emitting diode D5 is connected between the VDD pin of the HFC1531 module and the LED1 pin, the VSS pin of the HFC1531 module is grounded, the O/P pin is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is grounded. The electrode is connected to one end of speaker B, and the other end of speaker B is connected to a 9V power supply.

The resistors R1 and R2 use 51KΩ and 150Ω resistors respectively, the adjustable resistor RP uses a 1MΩ potentiometer, the capacitors C1 and C2 use 220μF and 100μF electrolytic capacitors respectively, the Zener diode DZ uses 2CW52, and the light-emitting diode D5 uses Red bright LED indicator light, transistor Q1 uses NPN transistor 9013, speaker B uses a dynamic speaker with a power of 1W and an impedance of 8Ω.

The circuit of the delay sound and light music doorbell of the present invention includes a control circuit and an acousto-optic circuit, wherein the control circuit is constructed by using a time base circuit NE555 chip, and the acousto-optic circuit is constructed by using a music flash integrated circuit HFC1531 module. When in use, just press the button once, and the doorbell can continue to respond for a period of time. It is no longer necessary to press the button for a long time to control the ringing of the doorbell. It is very convenient, and the ringtone is a wonderful music ringtone, and it is also equipped with The strength of the doorbell music is prompted by flashing LED lights, which can not only facilitate the identification of the elderly with poor hearing, but also have a dazzling sound and light decoration effect.

Description of drawings

Fig. 1 is the circuit diagram of the delay acousto-optic music doorbell of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the circuit of the time-delayed sound and light music doorbell of the present invention adopts 220V mains power through the step-down of transformer T1, bridge rectification of diodes D1-D4, and filtering by capacitor C1. Terminals respectively form a DC 9V power supply terminal and a ground terminal to supply power to the control circuit and the sound and light circuit of the subsequent stage.

The control circuit is constructed using a time base circuit NE555 chip, the 9V power supply is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 2 of the NE555 chip and one end of the button K, and the other end of the button K is grounded; the NE555 chip 4. Pin 8 is connected to the 9V power supply, pin 6 and 7 are connected to one end of the adjustable resistor RP, the adjustment end and the positive pole of the capacitor C2, the other end of the adjustable resistor RP is connected to the 9V power supply, and the negative pole of the capacitor C2 is grounded; pin 1 of the NE555 chip Ground, 5 pins are connected in series with capacitor C3 and then grounded, 3 pins are output to the sound and light circuit.

The acousto-optic circuit is constructed by using the music flash integrated circuit HFC1531 module, one end of the resistor R2 is connected to pin 3 of the control circuit NE555 chip, the other end of the resistor R2 is connected to the VDD pin and TRIG pin of the HFC1531 module and the negative pole of the Zener diode DZ, The anode of the Zener diode DZ is grounded, the light-emitting diode D5 is connected between the VDD pin of the HFC1531 module and the LED1 pin, the VSS pin of the HFC1531 module is grounded, the O/P pin is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is grounded. The electrode is connected to one end of speaker B, and the other end of speaker B is connected to a 9V power supply.

The working process of the delay sound and light music doorbell circuit is as follows: since the control circuit is a monostable delay circuit constructed by the NE555 chip, before the button K is pressed manually, pin 2 of the NE555 chip is at a high level, and the NE555 The chip is in a steady state, its pin 3 outputs a low level, and the HFC1531 module does not work. When the button K is pressed by hand, the pin 2 of the NE555 chip becomes low level, the NE555 chip enters a transient state, and the output pin 3 of the NE555 chip turns to high level, the HFC1531 module starts to work, and the speaker B emits the music sound of the memory of the HFC1531 module. At the same time, the light-emitting diode D5 flashes with the intensity of the music. When the button K is pressed, the capacitor C2 is quickly discharged through the discharge tube inside the chip through pin 7 of the NE555 chip. After the button K is released, the discharge tube inside the chip is turned off, and the capacitor C2 is charged through the adjustable resistor RP. After sounding for a period of time, when the voltage on the capacitor C2 is charged to 6V (2/3VDD), pin 2 of the NE555 chip becomes high level, the chip of NE555 resets to a steady state, and pin 3 flips and outputs low level, HFC1531 module Stop working, the speaker B stops sounding, and the LED D5 goes out. The time of the doorbell’s delayed sounding t=1.1RP·C2, adjusting the resistance value of the adjustable resistor RP, can adjust the time of the doorbell’s delayed sounding.

The above illustrations are only typical embodiments of the present invention and are not intended to limit the present invention. Any modifications or equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention .

Claims (2)

1. a kind of time delay sound light music doorbell, it is characterized in that：Its circuit adopts 220V civil power Jing transformator T1 blood pressure lowerings, diode D1～D4 bridge rectifiers, electric capacity C1 filtering after, the positive and negative end of electric capacity C1 formed respectively direct current 9V power ends and ground terminal to The control circuit of rear class and acousto-optic circuit are powered；

The control circuit is built using time base circuit NE555 chips, one end of 9V power supply connecting resistance R1, and resistance R1's is another One end of 2 feet and knob K of one termination NE555 chips, the other end ground connection of knob K；4,8 feet of NE555 chips connect 9V power supplys, 6th, 7 feet connect one end and adjustable side of adjustable resistance RP and the positive pole of electric capacity C2, another termination 9V power supply of adjustable resistance RP, electricity Hold the minus earth of C2；The 1 foot ground connection of NE555 chips, is grounded after 5 foot serial capacitance C3, and 3 feet are exported to acousto-optic circuit；

The acousto-optic circuit is built using music flashing integrated circuit HFC1531 modules, a termination control electricity of resistance R2 3 feet of road NE555 chips, the VDD feet and TRIG feet and Zener diode DZ of another termination HFC1531 module of resistance R2 Negative pole, the plus earth of Zener diode DZ are connected with light emitting diode D5 between the VDD feet and LED1 feet of HFC1531 modules, The VSS feet ground connection of HFC1531 modules, O/P feet connect the base stage of audion Q1, the grounded emitter of audion Q1, and colelctor electrode connects to be raised One end of sound device B, another termination 9V power supply of speaker B.

2. time delay sound light music doorbell according to claim 1, is characterized in that：The resistance R1 and R2 is respectively adopted 51K The resistance of Ω and 150 Ω, potentiometers of the adjustable resistance RP using 1M Ω, electric capacity C1 and C2 are respectively adopted the electricity of 220 μ F and 100 μ F Solution electric capacity, Zener diode DZ adopt 2CW52, Light-Emitting Diode D5 to adopt red highlighted LED light, audion Q1 to adopt NPN triode 9013, speaker B adopt power for 1W, and impedance is the coil-moving speaker of 8 Ω.