CN105069949A - Infrared alarm circuit based on microcomputer chip control - Google Patents
Infrared alarm circuit based on microcomputer chip control Download PDFInfo
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- CN105069949A CN105069949A CN201510506284.6A CN201510506284A CN105069949A CN 105069949 A CN105069949 A CN 105069949A CN 201510506284 A CN201510506284 A CN 201510506284A CN 105069949 A CN105069949 A CN 105069949A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
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Abstract
The invention provides an infrared alarm circuit based on microcomputer chip control. The infrared alarm circuit comprises a first chip IC1, a second chip IC2, a third chip IC3, a fourth chip IC4 and a fifth chip IC5, wherein the first pin of the first chip IC1 is respectively connected with the anode of a diode D6, the cathode of a diode D8 and one end of a capacitor C1. The cathode of the diode D6 is respectively connected with the anode of a diode D5 and the secondary coil of a power transformer T, the cathode of the diode D5 is connected with the anode of a diode D7 and the other end of the capacitor C1, the cathode of the diode D7 is connected with the anode of a diode D8 and the secondary coil of the power transformer T, and the primary coil of the power transformer is connected with a switch K1 and an external power supply VCC to form a loop. The alarm circuit improves the operation safety of a device, and is rich in function, and high in anti-interference capability. The detection precision of a system is improved, and the response is more sensitive.
Description
Technical field
The present invention relates to a kind of circuit structure of alarm, especially a kind of infra-red alarm circuit controlled based on chip of micro-computer, belongs to electronic technology field.
Background technology
Alarm device in the market has a lot, and its structural style is different, such as infra-red alarm, and it utilizes the detection of infrared ray wire harness to be used for realizing external detection, then utilizes the signal of feedback to control alarm equipment alarm.Existing infrared alarming apparatus is very general, and pattern is a lot, but function is different, current most infra-red alarm is all adopt single chip to control whole circuit structure, although it also can realize the control of detection to external signal and internal alarm, to a certain extent, there is potential safety hazard in this circuit, once as the control chip of core by artificial damage, that whole alarm circuit cannot normally work, thus lose efficacy; Moreover, rely on the alarm circuit of one chip, due to the impact by chip code capacity, often there is the problem of function singleness, be difficult to realize the dilatation of system and the expansion of peripheral hardware, this makes existing alarm device functionally very single, and the experience brought to user is very general, the promotion and application of the type equipment therefore affected, the value of product is also made a discount.
Summary of the invention
For above-mentioned deficiency of the prior art, fundamental purpose of the present invention is to solve the problem that existing current infra-red alarm equipment exists potential safety hazard, also solve the problem that existing detectors is relatively single further, and a kind of higher safety guarantee that has is provided, and the infra-red alarm circuit controlled based on chip of micro-computer of feature richness.
Technical scheme of the present invention: a kind of infra-red alarm circuit controlled based on chip of micro-computer, it is characterized in that, comprise the first chip IC 1 that model is CW7806, the 5th chip IC 5 that the 4th chip IC4 that the 3rd chip IC 3 that the second chip IC 2 that model is NE555, model are KA2184, model are SE555 and model are KD9561, first pin of described first chip IC 1 is connected with one end of the positive pole of diode D6, the negative pole of diode D8 and electric capacity C1 respectively, the negative pole of described diode D6 is connected with the first pin of power transformer T secondary coil with the positive pole of diode D5 respectively, the negative pole of described diode D5 is connected with the positive pole of diode D7 and the other end of electric capacity C1 respectively, the negative pole of described diode D7 is connected on the positive pole of diode D8 and the second pin of power transformer T secondary coil, and the primary coil of described power transformer T and K switch 1 and external power source VCC are connected to form loop, second pin of described power transformer T secondary coil also respectively with one end of electric capacity C12, one end of resistance R13, one end of electric capacity C3, first pin of the second chip IC 2, one end of resistance R14, the positive pole of infrared receiver tube D2, one end of electric capacity C4, one end of electric capacity C5, 4th pin of the 3rd chip IC 3, one end of electric capacity C6, one end of electric capacity C7, the emitter of triode Q1, one end of electric capacity C8, first pin of the 4th chip IC4, one end of electric capacity C9, one end of relay K, the positive pole of diode D3, one end of electric capacity C10, the positive pole of diode D4 is connected with the emitter of triode Q2, the other end of described electric capacity C12 is connected with one end of electric capacity C2 with one end of resistance R12, the other end of resistance R13 respectively, the other end of described resistance R12 is connected to the 3rd pin of the first chip IC 1, and the other end of described electric capacity C2 is connected to the second pin of the first chip IC 1, second pin of described first chip IC 1 is also connected with one end of one end of one end of one end of the 8th pin of one end of the 5th pin of the 4th pin of one end of resistance R1, the second chip IC 2, the second chip IC 2, resistance R3, the 3rd chip IC 3, resistance R6, resistance R8, resistance R9, the 4th pin of the 4th chip IC4, the 8th pin of the 4th chip IC4 and K switch 2 respectively, the other end of described resistance R1 is connected with one end of resistance R2 with the 7th pin of the second chip IC 2 respectively, and the other end of resistance R2 is connected with the 6th pin of the second chip IC 2, the second pin of the second chip IC 2 and the other end of electric capacity C3 respectively, the other end of described resistance R3 is connected to the positive pole of infrared emission tube D1, and the negative pole of described infrared emission tube D1 is connected with the 3rd pin of the second chip IC 2 and the other end of resistance R14 respectively, resistance R5 is connected with between the 8th pin and the 5th pin of the 3rd chip IC 3 of described 3rd chip IC 3, first pin of the 3rd chip IC 3 is connected with the negative pole of infrared receiver tube D2, the other end of electric capacity C4 is connected to after second pin of the 3rd chip IC 3 is connected with resistance R4,3rd pin of the 3rd chip IC 3 is connected with the other end of electric capacity C5,6th pin of the 3rd chip IC 3 is connected with the other end of electric capacity C6, and the 7th pin of the 3rd chip IC 3 is connected with the other end of the other end of resistance R6, one end of resistance R7 and electric capacity C7 respectively, the other end of described resistance R7 is connected with the base stage of triode Q1, and the collector of described triode Q1 is connected with the other end of second pin of the other end of the other end of resistance R8, electric capacity C8, the 4th chip IC4, the 6th pin of the 4th chip IC4, the 7th pin of the 4th chip IC4 and resistance R9 respectively, 5th pin of the 4th chip IC4 connects the other end of electric capacity C9,3rd pin of the 4th chip IC4 connects one end of the other end of relay K, the negative pole of diode D3 and electric capacity C11 respectively, and the other end of described electric capacity C11 is connected with one end of loudspeaker BL with the other end of K switch 2, the other end of electric capacity C10, the second pin of the 5th chip IC 5, the 3rd pin of the 5th chip IC 5 respectively, the other end of described loudspeaker BL is connected to the collector of triode Q2, the base stage of triode Q2 is connected with the 6th pin of the 5th chip IC 5, first pin of the 5th chip IC 5 is connected with the negative pole of diode D4, between the 4th pin and the 5th pin of the 5th chip IC 5 of the 5th chip IC 5, be connected with resistance R10.
Infra-red alarm of the present invention forms warning system by alarm host machine and infrared eye.Described infrared eye is made up of infrared emission tube D1 and infrared receiver tube D2, when pyroscan once detect invasion signal, infra-red alarm of the present invention invades Signal transmissions to alarm host machine warning immediately, after alarm host machine receives alerting signal, can start high-decibel siren onsite alarming device immediately, alarm host machine is here formed primarily of the 5th chip IC 5.For the ease of using, at infra-red alarm host panel, LED display alarm defence area can be installed, can clearly show invasion orientation like this, simultaneously can also the function such as displaying time, alarm logging inquiry, automatic switching.In the present invention, for the display of the invasion judgement in orientation and display, time, alarm logging and automatic switch machine information, can respectively by different chip controls.The present invention is exactly the combination by multiple chip, achieve the ability of the multi-functional and fast processing not available for existing infra-red alarm, it can either be separated into modular structure, make the design of function definitely clear, the slow-footed defect of the computing only having chip piece to cause can be solved again simultaneously, and not producing interference between each chip, the whole work efficiency of circuit is very high.
Optimally, described triode Q1 select model be 9013 transistor, described triode Q2 select model be 8050 transistor.9013 transistors adopted in the present invention have Current amplifier effect, play the effect that audio frequency amplifies here, and it is better that it can make the audio frequency of loudspeaker BL export, and sound is more clear; And the transistor of 8050 is here use as electronic switch, it can come unlatching or the disconnection of control loudspeaker according to the value of output voltage, thus realizes warning function.
Optimally, the model of described infrared emission tube D1 is L5IR850B-45, and the model of described infrared receiver tube D2 is SFH7221.The L5IR850B-45 type infrared emission tube that the present invention adopts has low power feature, and it can realize the object of infrared communication, and energy consumption is less simultaneously, can meet power supply capacity and the demand of microcircuit; And the SFH7221 type infrared receiver tube adopted here has high accuracy and sensitivity, and antijamming capability is comparatively strong, and the impact by environment during communication is less, and has good matching degree between infrared emission tube, and the scope of application is also very wide simultaneously.
Optimally, the model that described power transformer T selects is S7-315, and the model that described loudspeaker BL selects is
aS04004PO-WR-R.The S7-315 adopted in the present invention is small power transformer, and its isolation effect is better, and light power handling capabilities is also comparatively strong, particularly strong to the ability to transform of voltage, civil power can be converted to accurately the magnitude of voltage needed for circuit; Adopt in the present invention
aS04004PO-WR-Rit is good that loudspeaker then has amplification effect, also has certain tonequality filtration capacity simultaneously, alarm sound can be made more clear, avoid noise to cause interference.
Optimally, described relay K select model be 4098 small-sized electromagnetic type relay.Here the 4098 type relays selected have the little advantage of power, and because its structure is relatively simple, therefore wiring is easier, are conducive to simplifying and install.
Relative to prior art, the present invention has following beneficial effect:
1, improve the security that equipment runs: because alarm is normally arranged on very important position, therefore its use value originally very focuses on security, the present invention is by adopting the circuit structure of multi-chip, every chip block is responsible for different regions separately, and interlock can be realized, like this can when certain chip piece goes wrong wherein, still the realization of the major function of ensuring equipment, can independently deploy troops on garrison duty in the region controlled due to every chip block, even if therefore there is the situation of artificial damage, also whole equipment can not be caused to paralyse, thus greatly improve the security of warning device self.
2, function is abundanter: because the coding of every chip piece can be different, provides natural condition therefore to the dilatation of system; And can independently carry out due to the function in each fast chip controls region, such as the setting of the setting of alarm host machine switching on and shutting down time and instruction, time of fire alarming, built-in power voltage detecting prompting, to the Peripheral Interface needed for System Expansion and corresponding power supply, automatically carry out communicating etc. function with default contact person when there is alarm condition, can realize on device of the present invention, the great like this function enriching warning device, user uses also convenient.
3, antijamming capability is strong, the transmitting and receiving of detector are divided and is controlled by two chip blocks, avoid the false alarm that may occur, also realize the vibration adjustment of signal by the chip that another block is single simultaneously and amplify process, therefore improve the accuracy of detection of system, respond also sensitiveer.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of a kind of infra-red alarm circuit based on chip of micro-computer control of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, based on the infra-red alarm circuit that chip of micro-computer controls, comprise the first chip IC 1 that model is CW7806, the 5th chip IC 5 that the 4th chip IC4 that the 3rd chip IC 3 that the second chip IC 2 that model is NE555, model are KA2184, model are SE555 and model are KD9561.In the present invention, first chip IC 1 of model C W7806 is the integrated circuit (IC) chip of DC voltage-stabilizing, its load voltage value is less, therefore power consumption is little, it is single-row 3 pin encapsulation, and structure is very simple, is conducive to simplifying circuit structure, only need complete a function setting in the present invention, control effects is very outstanding; Second chip IC 2 of model NE555 mainly plays clocking capability in the present invention, because its stability and power-saving capability are given prominence to, therefore there is good matching degree, and only need a small amount of resistance and electric capacity can realize its function, therefore be designed with very large help for integrated circuit, the clocking capability of the second chip IC 2 can also be arranged the transmitting cycle of infrared emission tube simultaneously.Model is signal collection and the process that the 3rd chip IC 3 of KA2184 is mainly used in infrared receiver tube, and it can carry out analyzing and processing accurately to infrared signal, then realizes corresponding function by all the other module chips; In the present invention, model is that the 4th chip IC4 of SE555 has clocking capability equally, and it can realize the monitor and forecast to warning duration, switching on and shutting down time and magnitude of voltage etc.; And the 5th chip IC 5 that model is KD9561 not only can control loudspeaker, also have the function of System Expansion, it has good extendability simultaneously, can dock with external power source, also can realize the expansion of module.In the present invention, first pin of described first chip IC 1 respectively with the positive pole of diode D6, the negative pole of diode D8 is connected with one end of electric capacity C1, the negative pole of described diode D6 is connected with the first pin of power transformer T secondary coil with the positive pole of diode D5 respectively, the model that described power transformer T selects is S7-315, the negative pole of described diode D5 is connected with the positive pole of diode D7 and the other end of electric capacity C1 respectively, the negative pole of described diode D7 is connected on the positive pole of diode D8 and the second pin of power transformer T secondary coil, the primary coil of described power transformer T and K switch 1 and external power source VCC are connected to form loop, second pin of described power transformer T secondary coil also respectively with one end of electric capacity C12, one end of resistance R13, one end of electric capacity C3, first pin of the second chip IC 2, one end of resistance R14, the positive pole of infrared receiver tube D2, one end of electric capacity C4, one end of electric capacity C5, 4th pin of the 3rd chip IC 3, one end of electric capacity C6, one end of electric capacity C7, the emitter of triode Q1, one end of electric capacity C8, first pin of the 4th chip IC4, one end of electric capacity C9, one end of relay K, the positive pole of diode D3, one end of electric capacity C10, the positive pole of diode D4 is connected with the emitter of triode Q2, described relay K select model be 4098 small-sized electromagnetic type relay, described triode Q1 select model be 9013 transistor.The other end of described electric capacity C12 is connected with one end of electric capacity C2 with one end of resistance R12, the other end of resistance R13 respectively, the other end of described resistance R12 is connected to the 3rd pin of the first chip IC 1, and the other end of described electric capacity C2 is connected to the second pin of the first chip IC 1; Second pin of described first chip IC 1 is also connected with one end of one end of one end of one end of the 8th pin of one end of the 5th pin of the 4th pin of one end of resistance R1, the second chip IC 2, the second chip IC 2, resistance R3, the 3rd chip IC 3, resistance R6, resistance R8, resistance R9, the 4th pin of the 4th chip IC4, the 8th pin of the 4th chip IC4 and K switch 2 respectively; The other end of described resistance R1 is connected with one end of resistance R2 with the 7th pin of the second chip IC 2 respectively, and the other end of resistance R2 is connected with the 6th pin of the second chip IC 2, the second pin of the second chip IC 2 and the other end of electric capacity C3 respectively; The other end of described resistance R3 is connected to the positive pole of infrared emission tube D1, and the model of described infrared emission tube D1 is L5IR850B-45, and the negative pole of described infrared emission tube D1 is connected with the 3rd pin of the second chip IC 2 and the other end of resistance R14 respectively; Between the 8th pin and the 5th pin of the 3rd chip IC 3 of described 3rd chip IC 3, be connected with resistance R5, the first pin of the 3rd chip IC 3 is connected with the negative pole of infrared receiver tube D2, and the model of described infrared receiver tube D2 is SFH7221.The other end of electric capacity C4 is connected to after second pin of the 3rd chip IC 3 is connected with resistance R4,3rd pin of the 3rd chip IC 3 is connected with the other end of electric capacity C5,6th pin of the 3rd chip IC 3 is connected with the other end of electric capacity C6, and the 7th pin of the 3rd chip IC 3 is connected with the other end of the other end of resistance R6, one end of resistance R7 and electric capacity C7 respectively; The other end of described resistance R7 is connected with the base stage of triode Q1, and the collector of described triode Q1 is connected with the other end of second pin of the other end of the other end of resistance R8, electric capacity C8, the 4th chip IC4, the 6th pin of the 4th chip IC4, the 7th pin of the 4th chip IC4 and resistance R9 respectively; 5th pin of the 4th chip IC4 connects the other end of electric capacity C9,3rd pin of the 4th chip IC4 connects one end of the other end of relay K, the negative pole of diode D3 and electric capacity C11 respectively, and the other end of described electric capacity C11 is connected with one end of loudspeaker BL with the other end of K switch 2, the other end of electric capacity C10, the second pin of the 5th chip IC 5, the 3rd pin of the 5th chip IC 5 respectively; The model that described loudspeaker BL selects is
aS04004PO-WR-Rthe other end of described loudspeaker BL is connected to the collector of triode Q2, the base stage of triode Q2 is connected with the 6th pin of the 5th chip IC 5, described triode Q2 select model be 8050 transistor, first pin of the 5th chip IC 5 is connected with the negative pole of diode D4, between the 4th pin and the 5th pin of the 5th chip IC 5 of the 5th chip IC 5, be connected with resistance R10.
Principle of work: form by elements such as the second chip IC 2, resistance R1, resistance R2 and electric capacity C3 the multivibrator that oscillation frequency is 40kHz in the present invention.D1 is infrared emission tube, and its 40kHz high-frequency signal to external radiation, forms infrared light beam by it.D2 is infrared receiver tube, and D2 and the 3rd chip IC 3 form infrared receiver, shaping and amplifying circuit, and the infrared signal after amplification becomes electric impulse signal.4th chip IC4 and peripheral component composition warning executive circuit thereof, once second pin of the 4th chip IC4 is low level, circuit overturns immediately, and the 3rd pin of the 4th chip IC4 transfers high level output to immediately as signal output part, has delay function simultaneously.At ordinary times, infrared receiver tube D2 receives the infrared beam of radiation, 7th pin of the 3rd chip IC 3 is low level as signal output part, triode Q1 is cut-off state, second pin of the 4th chip IC4 is high level, 3rd pin of the 4th chip IC4 is low level output, and therefore subsequent conditioning circuit all can not work, and alarm free sound sends.When the main thoroughfare having people through antitheft thing, enter door or close antitheft thing, keep off Infrared, the moment blocked, 7th pin of the 3rd chip IC 3 transfers high level to immediately, thus make triode Q1 saturation conduction, second pin of the 3rd chip IC 3 is low level immediately, therefore the 4th chip IC4 overturns, 3rd pin of the 4th chip IC4 is high level, relay K obtains electric adhesive, connect the power supply of simulated sound warning special IC the 5th chip IC 5, loudspeaker BL just sends loud alarm song.Meanwhile, the 4th chip IC4 enters delay stage, and after the time of presetting, the 3rd pin of the 4th chip IC4 transfers low level to again, and now chimes of doom stops.If at this moment infrared ray is blocked again, circuit can start work again.
Infra-red alarm of the present invention can realize wired to code by detector and main frame, and can be learning type coding, therefore System Expansion simple and fast; Meanwhile, it self is separated into N number of independent defence area, and each defence area can be removed separately and be deployed troops on garrison duty, convenient and practical; Functionally, alarm host machine has two groups of timed power on/off times, and has the instruction of current open and close machine state, and warning signal is rung duration and also can be selected, and can stop wrong report; And infra-red alarm can match built-in standby power supply, and there is floating charge device and low-voltage alarm function; One group particularly can be provided often to open, one group of normally closed warning exports and+12V direct current exports, control for other equipment; Abundanter is to install dial module additional, can realize automatically dialing 4 groups of telephony features during warning, achieves powerful function, can meet the most demand of user.
It should be noted that, above embodiment is only in order to illustrate technical solution of the present invention but not restriction technologies scheme, although applicant is explained in detail the present invention with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those amendments that technical solution of the present invention is carried out or equivalently to replace, aim and the scope of the technical program can not be departed from, all should be encompassed in the middle of the claims in the present invention scope.
Claims (5)
1. the infra-red alarm circuit controlled based on chip of micro-computer, it is characterized in that, comprise the first chip IC 1 that model is CW7806, the 5th chip IC 5 that the 4th chip IC4 that the 3rd chip IC 3 that the second chip IC 2 that model is NE555, model are KA2184, model are SE555 and model are KD9561, first pin of described first chip IC 1 is connected with one end of the positive pole of diode D6, the negative pole of diode D8 and electric capacity C1 respectively, the negative pole of described diode D6 is connected with the first pin of power transformer T secondary coil with the positive pole of diode D5 respectively, the negative pole of described diode D5 is connected with the positive pole of diode D7 and the other end of electric capacity C1 respectively, the negative pole of described diode D7 is connected on the positive pole of diode D8 and the second pin of power transformer T secondary coil, and the primary coil of described power transformer T and K switch 1 and external power source VCC are connected to form loop, second pin of described power transformer T secondary coil also respectively with one end of electric capacity C12, one end of resistance R13, one end of electric capacity C3, first pin of the second chip IC 2, one end of resistance R14, the positive pole of infrared receiver tube D2, one end of electric capacity C4, one end of electric capacity C5, 4th pin of the 3rd chip IC 3, one end of electric capacity C6, one end of electric capacity C7, the emitter of triode Q1, one end of electric capacity C8, first pin of the 4th chip IC4, one end of electric capacity C9, one end of relay K, the positive pole of diode D3, one end of electric capacity C10, the positive pole of diode D4 is connected with the emitter of triode Q2, the other end of described electric capacity C12 is connected with one end of electric capacity C2 with one end of resistance R12, the other end of resistance R13 respectively, the other end of described resistance R12 is connected to the 3rd pin of the first chip IC 1, and the other end of described electric capacity C2 is connected to the second pin of the first chip IC 1, second pin of described first chip IC 1 is also connected with one end of one end of one end of one end of the 8th pin of one end of the 5th pin of the 4th pin of one end of resistance R1, the second chip IC 2, the second chip IC 2, resistance R3, the 3rd chip IC 3, resistance R6, resistance R8, resistance R9, the 4th pin of the 4th chip IC4, the 8th pin of the 4th chip IC4 and K switch 2 respectively, the other end of described resistance R1 is connected with one end of resistance R2 with the 7th pin of the second chip IC 2 respectively, and the other end of resistance R2 is connected with the 6th pin of the second chip IC 2, the second pin of the second chip IC 2 and the other end of electric capacity C3 respectively, the other end of described resistance R3 is connected to the positive pole of infrared emission tube D1, and the negative pole of described infrared emission tube D1 is connected with the 3rd pin of the second chip IC 2 and the other end of resistance R14 respectively, resistance R5 is connected with between the 8th pin and the 5th pin of the 3rd chip IC 3 of described 3rd chip IC 3, first pin of the 3rd chip IC 3 is connected with the negative pole of infrared receiver tube D2, the other end of electric capacity C4 is connected to after second pin of the 3rd chip IC 3 is connected with resistance R4,3rd pin of the 3rd chip IC 3 is connected with the other end of electric capacity C5,6th pin of the 3rd chip IC 3 is connected with the other end of electric capacity C6, and the 7th pin of the 3rd chip IC 3 is connected with the other end of the other end of resistance R6, one end of resistance R7 and electric capacity C7 respectively, the other end of described resistance R7 is connected with the base stage of triode Q1, and the collector of described triode Q1 is connected with the other end of second pin of the other end of the other end of resistance R8, electric capacity C8, the 4th chip IC4, the 6th pin of the 4th chip IC4, the 7th pin of the 4th chip IC4 and resistance R9 respectively, 5th pin of the 4th chip IC4 connects the other end of electric capacity C9,3rd pin of the 4th chip IC4 connects one end of the other end of relay K, the negative pole of diode D3 and electric capacity C11 respectively, and the other end of described electric capacity C11 is connected with one end of loudspeaker BL with the other end of K switch 2, the other end of electric capacity C10, the second pin of the 5th chip IC 5, the 3rd pin of the 5th chip IC 5 respectively, the other end of described loudspeaker BL is connected to the collector of triode Q2, the base stage of triode Q2 is connected with the 6th pin of the 5th chip IC 5, first pin of the 5th chip IC 5 is connected with the negative pole of diode D4, between the 4th pin and the 5th pin of the 5th chip IC 5 of the 5th chip IC 5, be connected with resistance R10.
2. according to claim 1 a kind of based on chip of micro-computer control infra-red alarm circuit, it is characterized in that, described triode Q1 select model be 9013 transistor, described triode Q2 select model be 8050 transistor.
3. a kind of infra-red alarm circuit controlled based on chip of micro-computer according to claim 2, it is characterized in that, the model of described infrared emission tube D1 is L5IR850B-45, and the model of described infrared receiver tube D2 is SFH7221.
4. a kind of infra-red alarm circuit controlled based on chip of micro-computer according to claim 3, it is characterized in that, the model that described power transformer T selects is S7-315, and the model that described loudspeaker BL selects is AS04004PO-WR-R.
5. according to claim 4 a kind of based on chip of micro-computer control infra-red alarm circuit, it is characterized in that, described relay K select model be 4098 small-sized electromagnetic type relay.
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Application publication date: 20151118 |