CN205983824U - 485 change infrared circuit - Google Patents
485 change infrared circuit Download PDFInfo
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- CN205983824U CN205983824U CN201620776828.0U CN201620776828U CN205983824U CN 205983824 U CN205983824 U CN 205983824U CN 201620776828 U CN201620776828 U CN 201620776828U CN 205983824 U CN205983824 U CN 205983824U
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Abstract
The problem that does not possess wireless transmission, the long -range schedules of copying to current electric energy meter, the utility model provides an individual 485 change infrared circuit is including infrared emission circuit, infrared receiving circuit, infrared modulated circuit, a 485 transceiver circuits 4 part, wherein, infrared modulated circuit, 485 transceiver circuits link to each other with infrared emission circuit respectively. Beneficial effect: the utility model discloses a pure hardware conversion, data are the transparent transmission mode, have solved data from 485 to ultra -red transmission problem, be applicable to all 485 and infrared between data conversion.
Description
Technical field
The utility model is related to the test equipment technical field of electric energy meter, specially a kind of 485 turns of infrared circuit.
Background technology
Infrared communication has the characteristics that with low cost, easy to use and compact conformation, therefore obtains in small type mobile devices
Obtained and be widely applied.Clearly indicate that needs have modulation infrared port on the electric energy meter of national grid at present, mainly use at present
To realize closely checking meter.And typically carry out calibration using 485 wired communications to during electric energy meter calibrating on stage body.Additionally,
The equipment such as the intelligent switch with function of measuring circulating extensively on existing, market, because the restriction of product structure is it is difficult to increase
Plus extra communicating circuit, only there is an infra red communication port.
For this reason, it may be necessary to provide a kind of device, existing electric energy meter equipment can either be coordinated to use, but also with low cost, Gao Wen
Qualitative, wieldy product performance.
Utility model content
Do not possess for existing electric energy meter be wirelessly transferred, the problem of remote meter-reading function, the utility model provide one 485
Turn infrared circuit；It is transparent transmission mode that the utility model adopts pure hardware conversion, data, solves data from 485 to infrared
Transmission problem it is adaptable to all 485 and infrared between data conversion.The utility model employs infrared scheme to electric energy meter
Carry out calibration, effectively solve the not corresponding problem of communication interface.The utility model is specific as follows：
A kind of 485 turns of infrared circuit, including infrared transmitting circuit, infrared receiving circuit, infrared debugging circuit, 485 transmitting-receivings
4 parts of circuit；Wherein, infrared debugging circuit, 485 transmission circuits are connected with infrared transmitting circuit respectively.
Infrared transmitting circuit, under the debugging of infrared debugging circuit drives, 485 transmission circuits is transmitted the 485 data lattice of coming
The signal of formula is converted into the signal of infrared form, and launches；Infrared receiving circuit is by the signal of the infrared form receiving
It is converted into the signal of 485 data forms；485 transmission circuits are responsible for receive signal format in parallel data character and serial number
Change according between character.
Furtherly, a kind of 485 turns of infrared circuit described in the utility model, preferred scheme is as follows：
Infrared transmitting circuit is by resistance R6, electric capacity C3, infrared transmitting tube U3, infrared transmitting tube U4, PNP triode Q1, NPN
Triode Q3, resistance R7 form；Wherein, one end of resistance R6, one end of electric capacity C3 are connected with the positive pole of infrared transmitting tube U3；
The negative pole of infrared transmitting tube U3 is connected with the positive pole of infrared transmitting tube U4；The negative pole of infrared transmitting tube U4 and PNP triode Q1
Emitter stage be connected；The base stage of PNP triode Q1 is connected with one end of resistance R7；The colelctor electrode of PNP triode Q1 and NPN
The colelctor electrode of triode Q3 is connected；
Infrared receiving circuit is made up of electric capacity C1, resistance R1, electric capacity C2, infrared receiving tube U1, resistance R5；Wherein, electric capacity
One end of C1 is connected with one end of resistance R1；The pin 3 of the other end of resistance R1 and infrared receiving tube U1, one end of electric capacity C2
It is connected；The other end of electric capacity C2, the pin 2 of infrared receiving tube U1 are connected；The pin 1 of infrared receiving tube U1 is with resistance R5's
One end is connected；
Infrared debugging electricity routing capacitance C4,38KHz crystal oscillator CRY1, electric capacity C5, resistance R8, resistance R9, NOT gate chip U5, electricity
Resistance R10, resistance R11, resistance R12, PNP triode Q2 composition；Wherein, one end of electric capacity C4, one end of 38KHz crystal oscillator CRY1,
One end of resistance R8, the pin 3 of NOT gate chip U5 link together；The other end of electric capacity C4,38KHz crystal oscillator CRY1 another
End, one end of resistance R9, the pin 6 of NOT gate chip U5, the pin 13 of NOT gate chip U5 link together；One end of electric capacity C5,
The other end of resistance R8, the pin 4 of NOT gate chip U5 link together；The other end of electric capacity C5, the other end of resistance R9, not gate
The pin 5 of chip U5 links together；The pin 12 of NOT gate chip U5 is connected with one end of resistance R10；NOT gate chip U5 draws
Pin 8 is connected with one end of resistance R11；The other end of resistance R11 is connected with the emitter stage of PNP triode Q2；PNP triode
The base stage of Q2 is connected with one end of resistance R12；
Described 485 transmission circuits, by resistance R2,485 transceiving chip U2, resistance R3, resistance R4, TVS pipe Z1, adjustable resistance
RV1 forms；Wherein, one end of resistance R2 is connected with the pin 1 of 485 transceiving chip U2；The pin 2 and 485 of 485 transceiving chip U2
The pin 3 of transceiving chip U2 is connected；The pin 6 of 485 transceiving chip U2, one end of resistance R4, one end of TVS pipe Z1, adjustable electric
One end of resistance RV1 is connected；The pin 7 of 485 transceiving chip U2, one end of resistance R3, the other end of TVS pipe Z1 are connected.
Beneficial technique effect
The utility model provides a kind of communication apparatus, in 485 interface equipments (debugging stage body equipment) and infrared interface equipment
The conversion of form of communication is realized, the utility model circuit is simple, applied widely between (debugged product).Its scope of application is such as
Shown in Fig. 1.
It is transparent transmission mode that the utility model adopts pure hardware conversion, data, solves data from 485 to infrared biography
Defeated problem it is adaptable to all 485 and infrared between data conversion.
The utility model employs infrared scheme and has carried out calibration to electric energy meter, effectively solves communication interface and does not correspond to
Problem.
Brief description
Fig. 1 is scope of application schematic diagram of the present utility model.
Fig. 2 is structural framing figure of the present utility model.
Fig. 3 is the circuit diagram of the utility model mid-infrared radiating circuit.
Fig. 4 is the circuit diagram of the utility model mid-infrared receiving circuit.
Fig. 5 is the circuit diagram of the utility model mid-infrared modulation circuit.
Fig. 6 is the circuit diagram of 485 transmission circuits in the utility model.
Fig. 7 is the schematic diagram of signal relation between each circuit of the utility model.
Fig. 8 is the signal waveforms of 485 reception-infrared transmissions in data transmission method described in the utility model.
Fig. 9 is the signal waveforms that data transmission method mid-infrared described in the utility model receives -485 transmissions.
Specific embodiment
Describe design feature of the present utility model in conjunction with accompanying drawing in detail.
Referring to Fig. 2 and Fig. 7, a kind of 485 turns of infrared circuit, including infrared transmitting circuit, infrared receiving circuit, infrared debugging
Circuit, 4 parts of 485 transmission circuit；Wherein, infrared debugging circuit, 485 transmission circuits are connected with infrared transmitting circuit respectively.
Infrared transmitting circuit, under the debugging of infrared debugging circuit drives, 485 transmission circuits is transmitted the 485 data lattice of coming
The signal of formula is converted into the signal of infrared form, and launches；Infrared receiving circuit is by the signal of the infrared form receiving
It is converted into the signal of 485 data forms；485 transmission circuits are responsible for receive signal format in parallel data character and serial number
Change according between character.
Referring to Fig. 3, infrared transmitting circuit is by resistance R6, electric capacity C3, infrared transmitting tube U3, infrared transmitting tube U4, PNP tri- pole
Pipe Q1, NPN triode Q3, resistance R7 composition；Wherein, one end of resistance R6, one end of electric capacity C3 and infrared transmitting tube U3 be just
Pole is connected；The negative pole of infrared transmitting tube U3 is connected with the positive pole of infrared transmitting tube U4；The negative pole of infrared transmitting tube U4 and PNP
The emitter stage of triode Q1 is connected；The base stage of PNP triode Q1 is connected with one end of resistance R7；The collection of PNP triode Q1
Electrode is connected with the colelctor electrode of NPN triode Q3.Another termination VCC of resistance R6；The other end of electric capacity C3, NPN triode
The emitter stage of Q3 meets GND；Another termination TXD of resistance R6；The base stage of NPN triode Q3 connects 38KHz oscillator signal；
Furtherly, the resistance of resistance R6 be 10 Ω, electric capacity C3 capacitance be 4.7 μ F, infrared transmitting tube U3 model
LF5038, infrared transmitting tube U4 model LF5038, PNP triode Q1 model 2SB1198K, NPN triode Q3 model
2SD1782K, the resistance of resistance R7 are 1k Ω.
Referring to Fig. 4, infrared receiving circuit is made up of electric capacity C1, resistance R1, electric capacity C2, infrared receiving tube U1, resistance R5；Its
In, one end of electric capacity C1 is connected with one end of resistance R1；The pin 3 of the other end of resistance R1 and infrared receiving tube U1, electric capacity
One end of C2 is connected；The other end of electric capacity C2, the pin 2 of infrared receiving tube U1 are connected；The pin 1 of infrared receiving tube U1 with
One end of resistance R5 is connected；
The pin 1 of infrared receiving tube U1, pin 2, pin 3 are respectively OUT pin, GND pin, VCC pin；
Node that electric capacity C1 is connected with resistance R1, another termination VCC of resistance R5；The other end of electric capacity C1, electric capacity C2
The node being connected with the pin 2 of infrared receiving tube U1 meets GND；The section that the pin 1 of infrared receiving tube U1 is connected with resistance R5
Point meets RXD；
Furtherly, model HS0038 of infrared receiving tube U1；Electric capacity C1 capacitance is 0.1 μ F, resistance R1 resistance is 10
Ω, electric capacity C2 capacitance are 4.7 μ F, resistance R5 resistance is 3.3k Ω.
Referring to Fig. 5, infrared debugging electricity routing capacitance C4,38KHz crystal oscillator CRY1, electric capacity C5, resistance R8, resistance R9, not gate
Chip U5, resistance R10, resistance R11, resistance R12, PNP triode Q2 composition；
One end of electric capacity C4, one end of 38KHz crystal oscillator CRY1, one end of resistance R8, the pin 3 of NOT gate chip U5 are connected to
Together；
The other end of electric capacity C4, the other end of 38KHz crystal oscillator CRY1, one end of resistance R9, the pin 6 of NOT gate chip U5,
The pin 13 of NOT gate chip U5 links together；
One end of electric capacity C5, the other end of resistance R8, the pin 4 of NOT gate chip U5 link together；
The other end of electric capacity C5, the other end of resistance R9, the pin 5 of NOT gate chip U5 link together；
The pin 12 of NOT gate chip U5 is connected with one end of resistance R10；
The pin 8 of NOT gate chip U5 is connected with one end of resistance R11；The other end of resistance R11 and PNP triode Q2
Emitter stage is connected；The base stage of PNP triode Q2 is connected with one end of resistance R12；
The pin 1 of NOT gate chip U5, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 11, draw
Pin 12, pin 13, pin 14 are followed successively by A1 pin, A2 pin, Y2 pin, A3 pin, Y3 pin, GND pin, Y4 pin, A4
Pin, A5 pin, Y6 pin, A6 pin, VCC pin；
The pin 1 of NOT gate chip U5, the pin 7 of NOT gate chip U5, the colelctor electrode of PNP triode Q2 meet GND；Resistance R12
Another termination TXD；Another termination 38KHz oscillator signal of resistance R10；The pin 4 of NOT gate chip U5 meets RXD；Resistance R11 with
The node that PNP triode Q2 is connected meets RXD '；
Furtherly, model 74HC04 of NOT gate chip U5；The capacitance of electric capacity C4 is 0.1 μ F, electric capacity C5 capacitance is 0.1
μ F, resistance R8 resistance are 1M Ω, resistance R9 resistance is 1M Ω, resistance R10 resistance is 1k Ω, resistance R11 resistance is 1k Ω, resistance
R12 resistance is 1k Ω, model 2SB1198K of PNP triode Q2.
Referring to Fig. 6, described 485 transmission circuits, by resistance R2,485 transceiving chip U2, resistance R3, resistance R4, TVS pipe Z1,
Adjustable resistance RV1 forms；Wherein, one end of resistance R2 is connected with the pin 1 of 485 transceiving chip U2；485 transceiving chip U2 draw
Pin 2 is connected with the pin 3 of 485 transceiving chip U2；The pin 6 of 485 transceiving chip U2, one end of resistance R4, the one of TVS pipe Z1
End, one end of adjustable resistance RV1 are connected；The pin 7 of 485 transceiving chip U2, one end of resistance R3, the other end of TVS pipe Z1
It is connected；
The pin 1 of 485 transceiving chip U2, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8 are followed successively by
RD pin, RE pin, DE pin, DI pin, GND pin, A pin, B pin, VCC pin；
The node that the pin 1 of 485 transceiving chip U2 is connected with resistance R2 meets TXD；The pin 2 of 485 transceiving chip U2 with draw
The node that pin 3 is connected meets RXD '；The pin 4 of 485 transceiving chip U2 meets RXD；The pin 5 of 485 transceiving chip U2, resistance R3 another
One end is grounded；The pin 8 of 485 transceiving chip U2 meets VCC；
Another termination 485A of adjustable resistance RV1；The node that the pin 7 of 485 transceiving chip U2 is connected with TVS pipe Z1 connects
485B；Described 485A and 485B is the port of 485 interface equipments.
Furtherly, model MAX3085 of 485 transceiving chip U2；The resistance of resistance R2 is 4.7k Ω, resistance R3 resistance
For 20k Ω, resistance R4 resistance be 20k Ω, TVS pipe Z1 model P6KE6.8CA, thermistor RV1 be PTC type, resistance be 30-
60Ω.
Referring to Fig. 2-6, optimum technical scheme is：
Infrared transmitting circuit is by resistance R6, electric capacity C3, infrared transmitting tube U3, infrared transmitting tube U4, PNP triode Q1, NPN
Triode Q3, resistance R7 form；Wherein, one end of resistance R6, one end of electric capacity C3 are connected with the positive pole of infrared transmitting tube U3；
The negative pole of infrared transmitting tube U3 is connected with the positive pole of infrared transmitting tube U4；The negative pole of infrared transmitting tube U4 and PNP triode Q1
Emitter stage be connected；The base stage of PNP triode Q1 is connected with one end of resistance R7；The colelctor electrode of PNP triode Q1 and NPN
The colelctor electrode of triode Q3 is connected；
Infrared receiving circuit is made up of electric capacity C1, resistance R1, electric capacity C2, infrared receiving tube U1, resistance R5；Wherein, electric capacity
One end of C1 is connected with one end of resistance R1；The pin 3 of the other end of resistance R1 and infrared receiving tube U1, one end of electric capacity C2
It is connected；The other end of electric capacity C2, the pin 2 of infrared receiving tube U1 are connected；The pin 1 of infrared receiving tube U1 is with resistance R5's
One end is connected；
Infrared debugging electricity routing capacitance C4,38KHz crystal oscillator CRY1, electric capacity C5, resistance R8, resistance R9, NOT gate chip U5, electricity
Resistance R10, resistance R11, resistance R12, PNP triode Q2 composition；Wherein, one end of electric capacity C4, one end of 38KHz crystal oscillator CRY1,
One end of resistance R8, the pin 3 of NOT gate chip U5 link together；The other end of electric capacity C4,38KHz crystal oscillator CRY1 another
End, one end of resistance R9, the pin 6 of NOT gate chip U5, the pin 13 of NOT gate chip U5 link together；One end of electric capacity C5,
The other end of resistance R8, the pin 4 of NOT gate chip U5 link together；The other end of electric capacity C5, the other end of resistance R9, not gate
The pin 5 of chip U5 links together；The pin 12 of NOT gate chip U5 is connected with one end of resistance R10；NOT gate chip U5 draws
Pin 8 is connected with one end of resistance R11；The other end of resistance R11 is connected with the emitter stage of PNP triode Q2；PNP triode
The base stage of Q2 is connected with one end of resistance R12；
Described 485 transmission circuits, by resistance R2,485 transceiving chip U2, resistance R3, resistance R4, TVS pipe Z1, adjustable resistance
RV1 forms；Wherein, one end of resistance R2 is connected with the pin 1 of 485 transceiving chip U2；The pin 2 and 485 of 485 transceiving chip U2
The pin 3 of transceiving chip U2 is connected；The pin 6 of 485 transceiving chip U2, one end of resistance R4, one end of TVS pipe Z1, adjustable electric
One end of resistance RV1 is connected；The pin 7 of 485 transceiving chip U2, one end of resistance R3, the other end of TVS pipe Z1 are connected.
Using a kind of data transmission method of 485 turns of infrared circuit described in the utility model, carry out as follows：
1. referring to Fig. 8, when needing, by data when 485 are transferred to infrared, to carry out as follows：
1.1 when on 485 data/address bus, data is 0, and infrared TXD sends data 0, because infrared transmitting tube and infrared receiver
Pipe is together, and therefore infrared receiving tube also receives data 0 simultaneously, and now RXD is low, and RXD ' is height, the base of triode Q1
Pole TXD is low, and triode turns on, and RXD ' is pulled low so that 485 receive transmission Enable Pin for low it is ensured that 485 circuit are in reception
State, realizes data 0 from 485 to infrared transmission；
1.2 when on 485 data/address bus, data is 1, and infrared TXD sends data 1, because infrared transmitting tube and infrared receiver
Pipe is together, and therefore infrared receiving tube also receives data 1 simultaneously, and now RXD is height, and RXD ' is low, the base of triode Q1
Pole TXD is height, and triode ends, and RXD ' level is low so that it is low it is ensured that 485 circuit are in and connect that 485 receptions send Enable Pin
Receipts state, realizes data 1 from 485 to infrared transmission；
2., referring to Fig. 9, when needing data from Infrared Transmission to 485, carry out as follows：
When 2.1 infrared receiver end RXD will receive data 0, RXD is low, and RXD ' is height, and base stage TXD of triode Q1 is
Height, triode cut-off, RXD ' is high so that 485 receive transmission Enable Pins for high it is ensured that 485 circuit are in transmission state, realizes
Data 0 from infrared to 485 transmission；
When 2.2 infrared receiver end RXD will receive data 1, RXD is height, and RXD ' is low, and base stage TXD of triode Q1 is
Height, triode ends, and RXD ' is low so that it is low that 485 receptions send Enable Pin, and now 485 drivers are in reception state, its
Pin 6,7 is in high-impedance state, and it is higher than B that outside upper and lower pull-up resistor makes 485 data/address bus level A, and data is 1, realizes data 1
From infrared to 485 transmission.
Claims (10)
1. a kind of 485 turns of infrared circuit it is characterised in that：Including infrared transmitting circuit, infrared receiving circuit, infrared modulated electricity
Road, 4 parts of 485 transmission circuit；Wherein, infrared modulated circuit, 485 transmission circuits are connected with infrared transmitting circuit respectively.
2. a kind of 485 turns of infrared circuit according to claim 1 it is characterised in that：Infrared transmitting circuit is by resistance R6, electricity
Hold C3, infrared transmitting tube U3, infrared transmitting tube U4, PNP triode Q1, NPN triode Q3, resistance R7 composition；Wherein, resistance R6
One end, one end of electric capacity C3 is connected with the positive pole of infrared transmitting tube U3；The negative pole of infrared transmitting tube U3 and infrared transmitting tube
The positive pole of U4 is connected；The negative pole of infrared transmitting tube U4 is connected with the emitter stage of PNP triode Q1；The base of PNP triode Q1
Pole is connected with one end of resistance R7；The colelctor electrode of PNP triode Q1 is connected with the colelctor electrode of NPN triode Q3.
3. a kind of 485 turns of infrared circuit according to claim 2 it is characterised in that：Resistance R6 resistance is 10 Ω, electric capacity C3
Capacitance is 4.7 μ F, infrared transmitting tube U3 model LF5038, infrared transmitting tube U4 model LF5038, PNP triode Q1 model
Resistance for 2SB1198K, NPN triode Q3 model 2SD1782K, resistance R7 is 1k Ω.
4. a kind of 485 turns of infrared circuit according to claim 1 it is characterised in that：Infrared receiving circuit is by electric capacity C1, electricity
Resistance R1, electric capacity C2, infrared receiving tube U1, resistance R5 are constituted；Wherein, one end of electric capacity C1 is connected with one end of resistance R1；Electricity
The other end of resistance R1 is connected with the pin 3 of infrared receiving tube U1, one end of electric capacity C2；The other end of electric capacity C2, infrared receiver
The pin 2 of pipe U1 is connected；The pin 1 of infrared receiving tube U1 is connected with one end of resistance R5.
5. a kind of 485 turns of infrared circuit according to claim 4 it is characterised in that：The model of infrared receiving tube U1
HS0038；Electric capacity C1 capacitance is 0.1 μ F, resistance R1 resistance is 10 Ω, electric capacity C2 capacitance is 4.7 μ F, resistance R5 resistance is 3.3k
Ω.
6. a kind of 485 turns of infrared circuit according to claim 1 it is characterised in that：Infrared modulated electricity routing capacitance C4,
38KHz crystal oscillator CRY1, electric capacity C5, resistance R8, resistance R9, NOT gate chip U5, resistance R10, resistance R11, resistance R12, PNP tri- pole
Pipe Q2 forms；One end of electric capacity C4, one end of 38KHz crystal oscillator CRY1, one end of resistance R8, the pin 3 of NOT gate chip U5 connect
Together；The other end of electric capacity C4, the other end of 38KHz crystal oscillator CRY1, one end of resistance R9, the pin 6 of NOT gate chip U5, non-
The pin 13 of door chip U5 links together；One end of electric capacity C5, the other end of resistance R8, the pin 4 of NOT gate chip U5 connect
Together；The other end of electric capacity C5, the other end of resistance R9, the pin 5 of NOT gate chip U5 link together；NOT gate chip U5's
Pin 12 is connected with one end of resistance R10；The pin 8 of NOT gate chip U5 is connected with one end of resistance R11；Resistance R11's is another
One end is connected with the emitter stage of PNP triode Q2；The base stage of PNP triode Q2 is connected with one end of resistance R12.
7. a kind of 485 turns of infrared circuit according to claim 6 it is characterised in that：The model of NOT gate chip U5
74HC04；The capacitance of electric capacity C4 is 0.1 μ F, electric capacity C5 capacitance is 0.1 μ F, resistance R8 resistance is 1M Ω, resistance R9 resistance is 1M
Ω, resistance R10 resistance are 1k Ω, resistance R11 resistance is 1k Ω, resistance R12 resistance is 1k Ω, the model of PNP triode Q2
2SB1198K.
8. a kind of 485 turns of infrared circuit according to claim 1 it is characterised in that：Described 485 transmission circuits, by resistance
R2,485 transceiving chip U2, resistance R3, resistance R4, TVS pipe Z1, adjustable resistance RV1 composition；Wherein, one end of resistance R2 and 485
The pin 1 of transceiving chip U2 is connected；The pin 2 of 485 transceiving chip U2 is connected with the pin 3 of 485 transceiving chip U2；485 transmitting-receivings
The pin 6 of chip U2, one end of resistance R4, one end of TVS pipe Z1, one end of adjustable resistance RV1 are connected；485 transceiving chips
The pin 7 of U2, one end of resistance R3, the other end of TVS pipe Z1 are connected.
9. a kind of 485 turns of infrared circuit according to claim 8 it is characterised in that：The model of 485 transceiving chip U2
MAX3085；Resistance R2 resistance is 4.7k Ω, resistance R3 resistance is 20k Ω, resistance R4 resistance is 20k Ω, TVS pipe Z1 model
P6KE6.8CA, adjustable resistance RV1 thermistor RV1 are PTC type, and resistance is 30-60 Ω.
10. a kind of 485 turns of infrared circuit according to claim 1 it is characterised in that：Infrared transmitting circuit by resistance R6,
Electric capacity C3, infrared transmitting tube U3, infrared transmitting tube U4, PNP triode Q1, NPN triode Q3, resistance R7 composition；Wherein, resistance
One end of R6, one end of electric capacity C3 are connected with the positive pole of infrared transmitting tube U3；The negative pole of infrared transmitting tube U3 and infrared emission
The positive pole of pipe U4 is connected；The negative pole of infrared transmitting tube U4 is connected with the emitter stage of PNP triode Q1；PNP triode Q1
Base stage is connected with one end of resistance R7；The colelctor electrode of PNP triode Q1 is connected with the colelctor electrode of NPN triode Q3；
Infrared receiving circuit is made up of electric capacity C1, resistance R1, electric capacity C2, infrared receiving tube U1, resistance R5；Wherein, electric capacity C1
One end is connected with one end of resistance R1；The other end of resistance R1 is connected with the pin 3 of infrared receiving tube U1, one end of electric capacity C2
Connect；The other end of electric capacity C2, the pin 2 of infrared receiving tube U1 are connected；The pin 1 of infrared receiving tube U1 and one end of resistance R5
It is connected；
Infrared debugging electricity routing capacitance C4,38KHz crystal oscillator CRY1, electric capacity C5, resistance R8, resistance R9, NOT gate chip U5, resistance
R10, resistance R11, resistance R12, PNP triode Q2 composition；Wherein, one end of electric capacity C4, one end of 38KHz crystal oscillator CRY1, electricity
One end of resistance R8, the pin 3 of NOT gate chip U5 link together；The other end of electric capacity C4, the other end of 38KHz crystal oscillator CRY1,
One end of resistance R9, the pin 6 of NOT gate chip U5, the pin 13 of NOT gate chip U5 link together；One end of electric capacity C5, resistance
The other end of R8, the pin 4 of NOT gate chip U5 link together；The other end of electric capacity C5, the other end of resistance R9, NOT gate chip
The pin 5 of U5 links together；The pin 12 of NOT gate chip U5 is connected with one end of resistance R10；The pin 8 of NOT gate chip U5 with
One end of resistance R11 is connected；The other end of resistance R11 is connected with the emitter stage of PNP triode Q2；PNP triode Q2
Base stage is connected with one end of resistance R12；
Described 485 transmission circuits, by resistance R2,485 transceiving chip U2, resistance R3, resistance R4, TVS pipe Z1, adjustable resistance RV1
Composition；Wherein, one end of resistance R2 is connected with the pin 1 of 485 transceiving chip U2；The pin 2 and 485 of 485 transceiving chip U2 is received
The pin 3 sending out chip U2 is connected；The pin 6 of 485 transceiving chip U2, one end of resistance R4, one end of TVS pipe Z1, adjustable resistance
One end of RV1 is connected；The pin 7 of 485 transceiving chip U2, one end of resistance R3, the other end of TVS pipe Z1 are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620776828.0U CN205983824U (en) | 2016-07-21 | 2016-07-21 | 485 change infrared circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620776828.0U CN205983824U (en) | 2016-07-21 | 2016-07-21 | 485 change infrared circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205983824U true CN205983824U (en) | 2017-02-22 |
Family
ID=58025822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620776828.0U Expired - Fee Related CN205983824U (en) | 2016-07-21 | 2016-07-21 | 485 change infrared circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205983824U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111968359A (en) * | 2020-07-16 | 2020-11-20 | 福建星网智慧科技有限公司 | RS 485-based infrared signal transmission control method and system |
-
2016
- 2016-07-21 CN CN201620776828.0U patent/CN205983824U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111968359A (en) * | 2020-07-16 | 2020-11-20 | 福建星网智慧科技有限公司 | RS 485-based infrared signal transmission control method and system |
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