CN205407778U

CN205407778U - Touch doorbell

Info

Publication number: CN205407778U
Application number: CN201620176092.3U
Authority: CN
Inventors: 刘雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-03-07
Filing date: 2016-03-07
Publication date: 2016-07-27
Anticipated expiration: 2026-03-07

Abstract

The utility model discloses a touch doorbell, transformer T, time base chip IC1, stereo set chip IC2, touch sensor M and driver chip IC3 when including, transformer T's former limit and 220V municipality ferroelectric phase even, vice limit links to each other with rectifier RT, rectifier RT just, be connected with filter capacitance C1 between the cathode output, behind controlling resistor RP and resistance R1 and the electric capacity C2 series connection and filter capacitance C1 is parallelly connected mutually, time base chip IC1's 8 feet and 4 feet with rectifier RT's positive output end is connected, time base chip IC1's 6 feet and 7 feet with resistance R1 links to each other, and time base chip IC1's 2 feet and 1 foot and rectifier RT's cathode output is connected. The utility model discloses simple structure, durable.

Description

Touch doorbell

Technical field

This utility model relates to a kind of circuit, relates more specifically to a kind of touch doorbell.

Background technology

" doorbell " civilian, other is extensively commonly used." doorbell " miscellaneous can be found everywhere, and doorbell English is Doorbell, i.e. bell on door, it is possible to sending sound prompting owner has visitor's visiting.Now relatively common doorbell all adopts mechanical compression formula, the doorbell of this mechanical compression formula, and due to life-time service, frame for movement is worn and torn, and doorbell is fragile.

Utility model content

For the defect of prior art, this utility model provides a kind of touch doorbell.

nullA kind of touch doorbell，Including time transformator T、Time base chip IC 1、Sound chip IC2、Touch inductor M、With driving chip IC3，The former limit of described transformator T and 220V city are electrically connected，Secondary is connected with commutator RT，Commutator RT is just、Filter capacitor C1 it is connected between cathode output end，Adjustable resistance RP and resistance R1 and electric capacity C2 is in parallel with described filter capacitor C1 after being connected in series，Time 8 feet of base chip IC 1 and 4 feet be connected with the cathode output end of described commutator RT，Time 6 feet of base chip IC 1 and 7 feet be connected with described resistance R1，Time 2 feet of base chip IC 1 and 1 foot be connected with the cathode output end of commutator RT，Described touch inductor M by electric capacity C5 with time base chip IC 12 feet be connected，5 feet of base chip IC 1 are connected by the cathode output end of electric capacity C3 and commutator RT，The cathode output end of commutator RT is connected with the colelctor electrode of audion VT，The base stage of described audion VT by resistance R2 with time base chip IC 13 feet be connected，Time described, 3 feet of base chip IC 1 are connected also by the cathode output end of electric capacity C4 with commutator RT，The emitter stage of described audion VT is connected by 5 feet and 6 feet of resistance R3 and sound chip IC2，The emitter stage of described audion VT is also connected with 1 foot of driving chip IC3 and 5 feet，The emitter stage of described audion VT is connected by 4 feet of speaker B and driving chip IC3，2 feet of described sound chip IC2、3 feet of driving chip IC3 are connected with the cathode output end of commutator RT respectively，7 feet of sound chip IC2 are connected by 8 feet of resistance R5 and sound chip IC2，3 feet of sound chip IC2 are connected by 2 feet of resistance R4 and driving chip IC3.

Optionally, time described, base chip IC 1 adopts NE555, sound chip IC2 to adopt KD9561, driving chip IC3 to adopt TWH8751.

The beneficial effects of the utility model are: adopt integrated circuit, and circuit structure is reliable, adopt touch inductor, are absent from mechanical wear, durable.

Accompanying drawing explanation

Fig. 1 is the structural representation that this utility model touches doorbell.

Detailed description of the invention

Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail, makes of the present utility model above-mentioned and other purpose, feature and advantage to become apparent from.The part that accompanying drawing labelling instruction identical in whole accompanying drawings is identical.Not deliberately accompanying drawing drawn to scale, it is preferred that emphasis is illustrate purport of the present utility model.

nullAs shown in Figure 1，Touch doorbell of the present utility model，Including time transformator T、Time base chip IC 1、Sound chip IC2、Touch inductor M、With driving chip IC3，The former limit of described transformator T and 220V city are electrically connected，Secondary is connected with commutator RT，Commutator RT is just、Filter capacitor C1 it is connected between cathode output end，Adjustable resistance RP and resistance R1 and electric capacity C2 is in parallel with described filter capacitor C1 after being connected in series，Time 8 feet of base chip IC 1 and 4 feet be connected with the cathode output end of described commutator RT，Time 6 feet of base chip IC 1 and 7 feet be connected with described resistance R1，Time 2 feet of base chip IC 1 and 1 foot be connected with the cathode output end of commutator RT，Described touch inductor M by electric capacity C5 with time base chip IC 12 feet be connected，5 feet of base chip IC 1 are connected by the cathode output end of electric capacity C3 and commutator RT，The cathode output end of commutator RT is connected with the colelctor electrode of audion VT，The base stage of described audion VT by resistance R2 with time base chip IC 13 feet be connected，Time described, 3 feet of base chip IC 1 are connected also by the cathode output end of electric capacity C4 with commutator RT，The emitter stage of described audion VT is connected by 5 feet and 6 feet of resistance R3 and sound chip IC2，The emitter stage of described audion VT is also connected with 1 foot of driving chip IC3 and 5 feet，The emitter stage of described audion VT is connected by 4 feet of speaker B and driving chip IC3，2 feet of described sound chip IC2、3 feet of driving chip IC3 are connected with the cathode output end of commutator RT respectively，7 feet of sound chip IC2 are connected by 8 feet of resistance R5 and sound chip IC2，3 feet of sound chip IC2 are connected by 2 feet of resistance R4 and driving chip IC3；Time described, base chip IC 1 adopts NE555, sound chip IC2 to adopt KD9561, driving chip IC3 to adopt TWH8751.

Work process: formed monostable trigger by NE555 and electric capacity C5, electric capacity C2, resistance RP, R1, when hands touches sensing chip M, produce to trigger signal, triggering signal makes steady state trigger work, 3 feet of NE555 produce high level, audion VT turns on so that sound chip IC2 and driving chip IC3 work, drives speaker B sounding.In work, 220V alternating current is through transformator T blood pressure lowering, and rectifier bridge RT exports DC voltage, when with hands touch sensible sheet M, its induced signal couples through electric capacity C5,2 feet of input 555,3 feet of NE555 produce high level, and audion VT turns on, connect the power supply of sound equipment chip IC 2 and driving chip IC3, the 3 foot output audio signals of sound chip IC2, this audio signal amplifies rear drive speaker B sounding, door bell rings by driving chip IC3.

Elaborate a lot of detail in the above description so that fully understanding this utility model.But above description is only preferred embodiment of the present utility model, this utility model can be implemented being much different from alternate manner described here, and therefore this utility model is by the restriction being embodied as disclosed above.Any those skilled in the art are without departing under technical solutions of the utility model ambit simultaneously, all may utilize the method for the disclosure above and technology contents and technical solutions of the utility model are made many possible variations and modification, or be revised as the Equivalent embodiments of equivalent variations.Every content without departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still falls within the scope of technical solutions of the utility model protection.

Claims

null1. one kind touches doorbell，It is characterized in that，Including time transformator T、Time base chip IC 1、Sound chip IC2、Touch inductor M、With driving chip IC3，The former limit of described transformator T and 220V city are electrically connected，Secondary is connected with commutator RT，Commutator RT is just、Filter capacitor C1 it is connected between cathode output end，Adjustable resistance RP and resistance R1 and electric capacity C2 is in parallel with described filter capacitor C1 after being connected in series，Time 8 feet of base chip IC 1 and 4 feet be connected with the cathode output end of described commutator RT，Time 6 feet of base chip IC 1 and 7 feet be connected with described resistance R1，Time 2 feet of base chip IC 1 and 1 foot be connected with the cathode output end of commutator RT，Described touch inductor M by electric capacity C5 with time base chip IC 12 feet be connected，5 feet of base chip IC 1 are connected by the cathode output end of electric capacity C3 and commutator RT，The cathode output end of commutator RT is connected with the colelctor electrode of audion VT，The base stage of described audion VT by resistance R2 with time base chip IC 13 feet be connected，Time described, 3 feet of base chip IC 1 are connected also by the cathode output end of electric capacity C4 with commutator RT，The emitter stage of described audion VT is connected by 5 feet and 6 feet of resistance R3 and sound chip IC2，The emitter stage of described audion VT is also connected with 1 foot of driving chip IC3 and 5 feet，The emitter stage of described audion VT is connected by 4 feet of speaker B and driving chip IC3，2 feet of described sound chip IC2、3 feet of driving chip IC3 are connected with the cathode output end of commutator RT respectively，7 feet of sound chip IC2 are connected by 8 feet of resistance R5 and sound chip IC2，3 feet of sound chip IC2 are connected by 2 feet of resistance R4 and driving chip IC3.
2. touch doorbell according to claim 1, it is characterised in that time described, base chip IC 1 adopts NE555, sound chip IC2 to adopt KD9561, driving chip IC3 to adopt TWH8751.