CN210664765U - Low-power-consumption circuit for infrared detection and communication - Google Patents
Low-power-consumption circuit for infrared detection and communication Download PDFInfo
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- CN210664765U CN210664765U CN201921839705.7U CN201921839705U CN210664765U CN 210664765 U CN210664765 U CN 210664765U CN 201921839705 U CN201921839705 U CN 201921839705U CN 210664765 U CN210664765 U CN 210664765U
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Abstract
The utility model discloses a low-power consumption circuit for infrared ray detection and communication, MCU includes IO1, IO2, IO3, the positive pole of infrared receipt emission tube D1 is connected respectively to IO3, comparator U1A positive input end, the one end of third resistance R3, the one end of seventh resistance, seventh resistance R7's other end ground connection, third resistance R3's the other end respectively with first electric capacity C1's one end, fifth resistance R5's one end is connected, first electric capacity C1's other end ground connection, fifth resistance R5's the other end respectively with comparator U1A negative input end, eighth resistance R8's one end is connected, comparator U1A's output is connected with eighth resistance R8's the other end, infrared receipt emission tube D1's negative pole is connected with second resistance R2's one end, second resistance R2's the other end is connected with IO 1. The utility model has the characteristics of the interference killing feature is strong, the consumption level is low.
Description
Technical Field
The utility model relates to an infrared detection circuit technical field specifically indicates a low-power consumption circuit for infrared detection and communication.
Background
In infrared detection and communication, the circuit design generally includes a transmitting circuit and a receiving circuit, an infrared emitting diode and a triode for infrared detection are required to be arranged, and two or more transmitting tubes are required.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low-power consumption circuit for infrared detection and communication has the characteristics that the interference killing feature is strong, the consumption level is low.
The utility model discloses can realize through following technical scheme:
the utility model discloses a low-power consumption circuit for infrared ray detection and communication, including MCU, second resistance R2, third resistance R3, fifth resistance R5, seventh resistance R7, eighth resistance R8, infrared receipt/emission pipe D1, first electric capacity C1, comparator U1A, MCU includes IO1 that is used for receiving infrared signal, IO2 that is used for receiving infrared trigger awakening signal, IO3 that is used for launching infrared control signal, IO3 connects the positive pole of infrared receipt/emission pipe D1 respectively, comparator U1A positive input terminal, the one end of third resistance R3, the one end of seventh resistance, the other end ground connection of seventh resistance R7, the other end of third resistance R3 respectively with the one end of first electric capacity C1, the one end of fifth resistance R5 is connected, the other end ground connection of first electric capacity C1, the other end of fifth resistance R5 respectively with comparator U1A, the other end of negative resistance R8, the output end of the comparator U1A is connected with the other end of the eighth resistor R8, the negative electrode of the infrared receiving/emitting tube D1 is connected with one end of the second resistor R2, and the other end of the second resistor R2 is connected with the IO 1.
Further, the second resistor R2 is 270R, the third resistor R3 is 470K, the fifth resistor R3 is 470K, the seventh resistor R3 is 10M, the eighth resistor R3 is 10M, and the first capacitor is 103.
Further, the MCU model is STC89C 52.
Further, the comparator U1A is model LM 2903P.
Further, the infrared receiving/transmitting tube D1 is model number IR 5120.
The utility model relates to a low-power consumption circuit for infrared detection and communication has following beneficial effect:
the infrared transmitting and receiving share the same infrared transmitting diode, so that the use of diodes is saved, the circuit design is simplified, and mutual interference caused by multiple diode components is avoided;
secondly, the power consumption is low, the circuit needs to use the MCU to carry out infrared encoding and decoding, the MCU is always in a low-power-consumption dormant state at ordinary times, in addition, the circuit comprises a low-power-consumption comparator and an infrared receiving tube to form an infrared detection circuit, and the circuit is always in a working state. (the MCU is awakened again when the infrared detection circuit detects the infrared signal, and the MCU is awakened and then carries out infrared signal decoding, thereby effectively reducing the power consumption level of the circuit.
Drawings
Fig. 1 is a circuit diagram of a low power consumption circuit for infrared detection and communication according to the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a detailed description of the product of the present invention with reference to the embodiments and the accompanying drawings.
As shown in fig. 1, the utility model discloses a low power consumption circuit for infrared detection and communication, which comprises an MCU, a second resistor R2, a third resistor R3, a fifth resistor R5, a seventh resistor R7, an eighth resistor R8, an infrared receiving/transmitting tube D1, a first capacitor C1, and a comparator U1A, wherein the MCU includes an IO1 for receiving an infrared signal, an IO2 for receiving an infrared trigger wake-up signal, and an IO3 for transmitting an infrared control signal, the IO3 is connected with the positive electrode of the infrared receiving/transmitting tube D1, the positive input terminal of the comparator U1A, one end of the third resistor R3, and one end of the seventh resistor, the other end of the seventh resistor R7 is grounded, the other end of the third resistor R3 is connected with one end of the first capacitor C1 and one end of the fifth resistor R5, the other end of the first capacitor C1 is grounded, the other end of the fifth resistor R5 is connected with the negative input terminal of the comparator U1A and the negative terminal of the comparator U8, the output end of the comparator U1A is connected with the other end of the eighth resistor R8, the negative electrode of the infrared receiving/emitting tube D1 is connected with one end of the second resistor R2, and the other end of the second resistor R2 is connected with the IO 1. The second resistor R2 is 270R, the third resistor R3 is 470K, the fifth resistor R3 is 470K, the seventh resistor R3 is 10M, the eighth resistor R3 is 10M, and the first capacitor is 103. The MCU model is STC89C 52; the model of the comparator U1A is LM 2903P; the infrared receiving/transmitting tube D1 is model number IR 5120.
The utility model discloses a same infrared transmitting tube is used to the circuit, and this infrared transmitting tube also is used as the function of infrared receiving tube simultaneously, realizes a pipe multipotency. The infrared receiving/transmitting tube is controlled by two IO ports of the MCU, when the infrared receiving/transmitting tube is used as a transmitting tube, the IO3 outputs an infrared coding signal, and the IO1 outputs low level; when the infrared receiving tube is used, the IO3 outputs low level, the IO1 outputs high level, after proper time delay, the IO1 is converted into an input state, and the infrared coding signal is read in. The MCU is always in a dormant state, the IO1 works in an output state and outputs, the IO3 is in a turn-off state and is connected with an external circuit, and at the moment, the infrared receiving/transmitting tube and the comparator circuit form a low-power-consumption infrared detection circuit. Under the condition that no infrared signal exists, the infrared trigger wake-up signal outputs low level, when the infrared signal is detected, the infrared trigger wake-up signal outputs high level, the MCU is triggered and awakened through the IO3, the MCU detects infrared coded data after awakening, and the MCU immediately enters a sleep mode after the infrared data detection is finished. The utility model discloses the characteristics of circuit are that MCU is in dormant state at ordinary times always, and infrared signal is detected by the low-power consumption comparator, awakens up MCU again after detecting infrared signal and receives infrared coding data. The working mode not only ensures that the infrared data can be received in real time, but also reduces the power consumption of the circuit to the maximum extent
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the present invention can be smoothly implemented by those skilled in the art according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations that are equivalent to those of the above-described embodiments may be made without departing from the scope of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (3)
1. A low-power consumption circuit for infrared detection and communication, characterized in that: the infrared receiving/transmitting tube comprises an MCU, a second resistor R2, a third resistor R3, a fifth resistor R5, a seventh resistor R7, an eighth resistor R8, an infrared receiving/transmitting tube D1, a first capacitor C1 and a comparator U1A, wherein the MCU comprises an IO1 for receiving an infrared signal, an IO2 for receiving an infrared triggering wake-up signal and an IO3 for transmitting an infrared control signal, the IO3 is respectively connected with the anode of the infrared receiving/transmitting tube D1, the positive input end of the comparator U1A, one end of the third resistor R3 and one end of the seventh resistor, the other end of the seventh resistor R7 is grounded, the other end of the third resistor 686R 9 is respectively connected with one end of a first capacitor C1 and one end of a fifth resistor R5, the other end of the first capacitor C1 is grounded, the other end of the fifth resistor R5 is respectively connected with the negative input end of the comparator U1A and one end of the eighth resistor R8, the other end of the comparator U1 is connected with the output end of the eighth resistor R8, the cathode of the infrared receiving/transmitting tube D1 is connected with one end of a second resistor R2, and the other end of the second resistor R2 is connected with IO 1.
2. A low power circuit for infrared detection and communication as defined in claim 1, wherein: the second resistor R2 is 270R, the third resistor R3 is 470K, the fifth resistor R3 is 470K, the seventh resistor R3 is 10M, the eighth resistor R3 is 10M, and the first capacitor is 103.
3. A low power circuit for infrared detection and communication as defined in claim 2, wherein: the MCU model is STC89C 52; the model of the comparator U1A is LM 2903P; the infrared receiving/transmitting tube D1 is model number IR 5120.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921839705.7U CN210664765U (en) | 2019-10-29 | 2019-10-29 | Low-power-consumption circuit for infrared detection and communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921839705.7U CN210664765U (en) | 2019-10-29 | 2019-10-29 | Low-power-consumption circuit for infrared detection and communication |
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| Publication Number | Publication Date |
|---|---|
| CN210664765U true CN210664765U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921839705.7U Active CN210664765U (en) | 2019-10-29 | 2019-10-29 | Low-power-consumption circuit for infrared detection and communication |
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| CN (1) | CN210664765U (en) |
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2019
- 2019-10-29 CN CN201921839705.7U patent/CN210664765U/en active Active
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