CN207233135U - A kind of supervisory circuit using infrared LED - Google Patents

Abstract

The utility model discloses a kind of supervisory circuit using infrared LED, including unidirectional thyristor Q1, loudspeaker B, triode V1 and power supply E, the resistance of the power supply E connects the anode of electronics R5, resistance R6 and unidirectional thyristor Q1, the pin 2 of the control pole connection chip IC 1 of unidirectional thyristor Q1, the anode of the other end connection diode D3 of resistance R5, the collector of other end connecting triode V3 and the control pole of unidirectional thyristor Q1 of resistance R6.The utility model using infrared LED monitor circuit structure is simple, component is few, utilize light emitting diode and phototriode composition infrared monitoring light path, good concealment, control is accurate, while is controlled and turned on by unidirectional thyristor, therefore once triggers, timing burglar destroys trigger source, circuit can also work normally, while can also send flashing lamp and alarm, thus have the advantages that good concealment, it is anti-crack with it is vdiverse in function.

Description

A kind of supervisory circuit using infrared LED

Technical field

A kind of anti-theft circuit is the utility model is related to, is specifically a kind of supervisory circuit using infrared LED.

Background technology

As the improvement of people's living standards, the valuables of family are also more and more, such as mobile phone, laptop, head Decorations etc., therefore also increasingly pay attention to security protection work, achievement in research of the electronic security equipment as Modern Electronic industry, Alarm security facility through being widely applied in the environment such as various families, office, currently used security device are alarms, The alarm of in the market is varied, is mostly that infrared triggering, vibrations triggering and gate controlled switch, these alarm generally existings are prevented Crack poor performance, the defects of function is single.

Utility model content

The purpose of this utility model is to provide a kind of supervisory circuit using infrared LED, to solve above-mentioned background technology The problem of middle proposition.

To achieve the above object, the utility model provides following technical solution：

A kind of supervisory circuit using infrared LED, including unidirectional thyristor Q1, loudspeaker B, triode V1 and power supply E, it is described The resistance of power supply E connects the anode of electronics R5, resistance R6 and unidirectional thyristor Q1, the control pole connection chip of unidirectional thyristor Q1 The pin 2 of IC1, the anode of the other end connection diode D3 of resistance R5, the current collection of the other end connecting triode V3 of resistance R6 Pole and the control pole of unidirectional thyristor Q1, anode, loudspeaker B, resistance R2, the electricity of the cathode connection diode D1 of unidirectional thyristor Q1 Hinder the anode of R3 and diode D2, the other end connection capacitance C1 of cathode connection the resistance R1, resistance R1 of diode D1 and three poles The collector of pipe V1, the other end of other end connection resistance R2 and the base stage of triode V2 of capacitance C1, the other end of resistance R3 Connect the base stage of capacitance C2 and triode V1, the collector and resistance R4 of the other end connecting triode V2 of capacitance C2, resistance R4 Other end connection diode D3 cathode, emitter, the hair of triode V3 of the emitter connecting triode V2 of triode V1 The anode of emitter-base bandgap grading, the cathode of diode D2 and power supply E.

Preferred solution as the utility model：The diode D1 is red light-emitting diode, and diode D2 is green light Light emitting diode, diode D3 are infrared light-emitting diode.

Preferred solution as the utility model：The capacitance C1 and capacitance C2 are tunable capacitor.

Preferred solution as the utility model：The triode V3 is phototriode.

Compared with prior art, the beneficial effects of the utility model are：The utility model utilizes the supervisory circuit of infrared LED It is simple in structure, component is few, utilize light emitting diode and phototriode composition infrared monitoring light path, good concealment, control essence Standard, while controlled and turned on by unidirectional thyristor, therefore once trigger, timing burglar destroys trigger source, and circuit also can normal work Make, while flashing lamp and alarm can also be sent, thus have the advantages that good concealment, prevent cracking with it is vdiverse in function.

Brief description of the drawings

Fig. 1 is the circuit diagram using the supervisory circuit of infrared LED.

Embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained, shall fall within the protection scope of the present invention.

Referring to Fig. 1, a kind of supervisory circuit using infrared LED, including unidirectional thyristor Q1, loudspeaker B, triode V1 and The resistance of power supply E, the power supply E connect the anode of electronics R5, resistance R6 and unidirectional thyristor Q1, the control pole of unidirectional thyristor Q1 Connect the pin 2 of chip IC 1, the anode of the other end connection diode D3 of resistance R5, the other end connecting triode of resistance R6 The collector of V3 and the control pole of unidirectional thyristor Q1, the anode of the cathode connection diode D1 of unidirectional thyristor Q1, loudspeaker B, The anode of resistance R2, resistance R3 and diode D2, the other end connection capacitance of cathode connection the resistance R1, resistance R1 of diode D1 The collector of C1 and triode V1, the other end of other end connection resistance R2 and the base stage of triode V2 of capacitance C1, resistance R3 The other end connection capacitance C2 and triode V1 base stage, the collector and resistance of the other end connecting triode V2 of capacitance C2 The cathode of the other end connection diode D3 of R4, resistance R4, the emitter of the emitter connecting triode V2 of triode V1, three poles The anode of the emitter of pipe V3, the cathode of diode D2 and power supply E.

Diode D1 is red light-emitting diode, and diode D2 is green light LED, and diode D3 is infraluminescence Diode.Capacitance C1 and capacitance C2 is tunable capacitor.Triode V3 is phototriode.

The operation principle of the utility model is：Resistance R5, resistance R6, diode D3 and triode V3 compositions one in circuit Group infrared detector, under normal circumstances, since the conducting of diode D3 shines, the base stage of phototriode V3 be subject to illumination and Conducting, the control pole tension of unidirectional thyristor Q1 is short-circuited at this time, therefore Q1 is not turned on, in diode D3 and the light of triode V3 Infrared monitoring line is formed on road, once someone triggers monitoring area, light path will be blocked so that triode V3 is disconnected, this When voltage be added in the control pole of unidirectional thyristor Q1, unidirectional thyristor Q1 conductings, circuit below obtains electric, the base of triode V1 Resistance R3 elder generations ON operation is passed through in pole, and capacitance C2 discharges V1, and triode V1 work, collector potential bottom, power supply will pass through electricity Hinder R2 to charge to capacitance C1, when C2 is from completely electrically disconnected, C1 will be charged to cut-in voltage more than V2 transistors, start to work, afterwards V1 and V2 is worked alternatively.So red light-emitting diode D1 and green light LED D2 can alternately flicker, change two capacitances Capacity, the flicker frequency with regard to lamp can be changed.The light of flicker can draw back burglar, while loudspeaker B ON operations with fear, send alarm Sound, remind user or near.Once unidirectional thyristor triggering and conducting, is no longer controlled by IC1, therefore even if light path is multiple again Original, circuit still may proceed to alert operation.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new The scope of type is indicated by the appended claims rather than the foregoing description, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are embraced therein.Any reference numeral in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (4)

1. a kind of supervisory circuit using infrared LED, including unidirectional thyristor Q1, loudspeaker B, triode V1 and power supply E, its feature It is, the resistance of the power supply E connects the anode of electronics R5, resistance R6 and unidirectional thyristor Q1, the control pole of unidirectional thyristor Q1 Connect the pin 2 of chip IC 1, the anode of the other end connection diode D3 of resistance R5, the other end connecting triode of resistance R6 The collector of V3 and the control pole of unidirectional thyristor Q1, the anode of the cathode connection diode D1 of unidirectional thyristor Q1, loudspeaker B, The anode of resistance R2, resistance R3 and diode D2, the other end connection capacitance of cathode connection the resistance R1, resistance R1 of diode D1 The collector of C1 and triode V1, the other end of other end connection resistance R2 and the base stage of triode V2 of capacitance C1, resistance R3 The other end connection capacitance C2 and triode V1 base stage, the collector and resistance of the other end connecting triode V2 of capacitance C2 The cathode of the other end connection diode D3 of R4, resistance R4, the emitter of the emitter connecting triode V2 of triode V1, three poles The anode of the emitter of pipe V3, the cathode of diode D2 and power supply E.

2. a kind of supervisory circuit using infrared LED according to claim 1, it is characterised in that the diode D1 is Red light-emitting diode, diode D2 are green light LED, and diode D3 is infrared light-emitting diode.

3. a kind of supervisory circuit using infrared LED according to claim 1, it is characterised in that the capacitance C1 and electricity It is tunable capacitor to hold C2.

4. a kind of supervisory circuit using infrared LED according to claim 1, it is characterised in that the triode V3 is Phototriode.