CN214900657U - 5V changes 3.3V's communication circuit - Google Patents
5V changes 3.3V's communication circuit Download PDFInfo
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- CN214900657U CN214900657U CN202121332659.9U CN202121332659U CN214900657U CN 214900657 U CN214900657 U CN 214900657U CN 202121332659 U CN202121332659 U CN 202121332659U CN 214900657 U CN214900657 U CN 214900657U
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Abstract
The communication circuit for converting 5V into 3.3V comprises a control module, a voltage reduction module, a communication module, a WIFI module and a power supply communication socket CN 1; the power supply communication socket CN1 is connected with the voltage reduction module and supplies power to the voltage reduction module, the power supply communication socket CN1 is connected with the communication module, and the power supply communication socket CN1 is connected with the control module; the voltage reduction module is connected with the WIFI module and supplies power to the WIFI module, and the WIFI module is connected with the communication module. The utility model discloses a communication between control module and the WIFI module can be realized in the setting of step-down module.
Description
Technical Field
The utility model belongs to the technical field of the circuit, concretely relates to 5V changes 3.3V's communication circuit.
Background
In order to adapt to the major trend of household appliance intellectualization, more and more household appliances are additionally provided with WIFI modules for remote control, a main control chip of a circuit board control module of a traditional household appliance generally adopts 5V power supply, part of the WIFI modules adopt 3.3V power supply, and different voltages of the main control chip and the WIFI modules enable the main control chip and the WIFI modules not to be directly communicated, so that certain limitation exists, and therefore, a voltage conversion circuit is necessary to be designed to enable the control modules and the WIFI modules to be normally communicated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a 5V changes 3.3V's communication circuit, its setting through the step-down module can realize the communication between control module and the WIFI module.
In order to achieve the above object, the embodiment of the present invention provides a technical solution:
the communication circuit for converting 5V into 3.3V comprises a control module, a voltage reduction module, a communication module, a WIFI module and a power supply communication socket CN 1;
the power supply communication socket CN1 is connected with the voltage reduction module and supplies power to the voltage reduction module, the power supply communication socket CN1 is connected with the communication module, and the power supply communication socket CN1 is connected with the control module;
the voltage reduction module is connected with the WIFI module and supplies power to the WIFI module, and the WIFI module is connected with the communication module.
The voltage reduction module comprises a three-terminal voltage regulator U1, an electrolytic capacitor EC1 and an electrolytic capacitor EC 2;
the first end of the three-terminal voltage regulator U1, the negative end of the electrolytic capacitor EC2, the negative end of the electrolytic capacitor EC1 and the pin 2 of the power supply communication socket CN1 are all grounded;
the second end of the three-terminal voltage stabilizer U1 outputs 3.3V voltage, and the second end of the three-terminal voltage stabilizer U1 is connected with the positive end of the electrolytic capacitor EC 2;
and the third end of the three-end voltage stabilizer U1 is respectively connected with the positive end of the electrolytic capacitor EC1 and the 1 pin of the power supply communication socket CN 1.
The WIFI module comprises a chip IC1 and a capacitor C2;
the communication module comprises a capacitor C1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1 and a triode Q2;
the pin 8 of the chip IC1 is respectively connected with the second end of the three-terminal regulator U1 and the first end of the capacitor C2;
the pin 9 of the chip IC1 and the second end of the capacitor C2 are both grounded;
the 15 pins of the chip IC1 are respectively connected with the first end of a capacitor C1, the first end of a resistor R1 and the first end of a resistor R3;
the 16 pins of the chip IC1 are respectively connected with a first end of a resistor R2 and a first end of a resistor R5;
the second end of the capacitor C1 and the second end of the resistor R3 are both grounded;
the second end of the resistor R1 is connected with the 4 pins of the power supply communication socket CN 1;
the second end of the resistor R2 and the E pole of the triode Q2 are connected with the second end of the three-terminal regulator U1;
the second end of the resistor R5 is connected with the B pole of the triode Q2;
the C electrode of the triode Q2 is connected with the B electrode of the triode Q1;
the E pole of the triode Q1 is grounded;
the C electrode of the triode Q1 is respectively connected with the first end of the resistor R4 and the first end of the resistor R6;
the second end of the resistor R4 is connected with a pin 1 of a power supply communication socket CN 1;
the second end of the resistor R6 is connected with the 3-pin of the power supply communication socket CN 1.
The control module comprises a chip U2, a capacitor C4, a capacitor C5, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R12 and a resistor R13;
the pin 7 of the chip U2 is connected with the first end of a resistor R7;
the pin 8 of the chip U2 is connected with the first end of the resistor R8;
the pin 9 of the chip U2 is connected with the first end of the resistor R9, and the second end of the resistor R9 and the first end of the capacitor C4 are respectively connected with the pin 3 of the power supply communication socket CN 1;
the pin 10 of the chip U2 is connected with the first end of the resistor R10, and the second end of the resistor R10 and the first end of the capacitor C5 are respectively connected with the pin 4 of the power supply communication socket CN 1;
the pin 13 of the chip U2 is connected with the first end of the resistor R12;
the pin 14 of the chip U2 is connected with a first end of a resistor R13;
the second end of the resistor R8 and the second end of the resistor R13 are respectively connected with a pin 1 of a power supply communication socket CN 1;
the second end of the resistor R7, the second end of the capacitor C4, the second end of the capacitor C5 and the second end of the resistor R12 are grounded.
The model of the chip U2 is BF7612BM 28.
The utility model has the advantages as follows:
the utility model discloses a communication between control module and the WIFI module can be realized in the setting of step-down module.
Drawings
Fig. 1 is a schematic diagram of a power supply communication socket CN1 according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a voltage reduction module according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of the WIFI module according to an embodiment of the present invention.
Fig. 4 is a partial circuit diagram of a communication module according to an embodiment of the present invention.
Fig. 5 is a partial circuit diagram of a communication module according to an embodiment of the present invention.
Fig. 6 is a circuit diagram of a control module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Referring to fig. 1-6, the 5V to 3.3V communication circuit includes a control module, a voltage-reducing module, a communication module, a WIFI module and a power supply communication socket CN 1;
the power supply communication socket CN1 is connected with the voltage reduction module and supplies power to the voltage reduction module, the power supply communication socket CN1 is connected with the communication module, and the power supply communication socket CN1 is connected with the control module;
the voltage reduction module is connected with the WIFI module and supplies power to the WIFI module, and the WIFI module is connected with the communication module.
The utility model discloses a communication between control module and the WIFI module can be realized in the setting of step-down module.
Further, the voltage reduction module comprises a three-terminal voltage regulator U1, an electrolytic capacitor EC1 and an electrolytic capacitor EC 2;
the first end of the three-terminal voltage regulator U1, the negative end of the electrolytic capacitor EC2, the negative end of the electrolytic capacitor EC1 and the pin 2 of the power supply communication socket CN1 are all grounded;
the three-terminal regulator U1 is model AMS 1117.
The communication circuit for converting 5V into 3.3V also comprises a 5V power supply, wherein the output end of the 5V power supply is connected with a pin 1 of a power supply communication socket CN 1;
the second end of the three-terminal voltage stabilizer U1 outputs 3.3V voltage, and the second end of the three-terminal voltage stabilizer U1 is connected with the positive end of the electrolytic capacitor EC 2;
and the third end of the three-end voltage stabilizer U1 is respectively connected with the positive end of the electrolytic capacitor EC1 and the 1 pin of the power supply communication socket CN 1.
Further, the WIFI module includes a chip IC1 and a capacitor C2;
the chip IC1 of the WIFI module is a TUYA-WBR 3 model number chip of Hangzhou doodling information technology Limited.
The communication module comprises a capacitor C1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1 and a triode Q2;
the 8 pins of the chip IC1 are respectively connected with the second end of the three-terminal regulator U1 and the first end of the capacitor C2, namely the chip IC1 adopts 3.3V for power supply;
the pin 9 of the chip IC1 and the second end of the capacitor C2 are both grounded;
the 15 pins of the chip IC1 are respectively connected with the first end of a capacitor C1, the first end of a resistor R1 and the first end of a resistor R3;
the 16 pins of the chip IC1 are respectively connected with a first end of a resistor R2 and a first end of a resistor R5;
the second end of the capacitor C1 and the second end of the resistor R3 are both grounded;
the second end of the resistor R1 is connected with the 4 pins of the power supply communication socket CN 1;
the second end of the resistor R2 and the E pole of the triode Q2 are connected with the second end of the three-terminal regulator U1;
the second end of the resistor R5 is connected with the B pole of the triode Q2;
the C electrode of the triode Q2 is connected with the B electrode of the triode Q1;
the E pole of the triode Q1 is grounded;
the C electrode of the triode Q1 is respectively connected with the first end of the resistor R4 and the first end of the resistor R6;
the second end of the resistor R4 is connected with a pin 1 of a power supply communication socket CN 1;
the second end of the resistor R6 is connected with the 3-pin of the power supply communication socket CN 1.
The communication module converts voltage through the two triodes, when a pin 16 (namely a TX end) of the chip IC1 is in a low level, the triode Q1 and the triode Q2 are not conducted, and the level of a pin 3 (namely a TX _ out end) of the power supply communication socket CN1 is stabilized at GND due to the effect of a pull-up resistor of the resistor R4;
when the pin 16 of the chip IC1 is at high level, the pin 16 of the chip IC1 is at 3.3V, a voltage drop of 3.3V exists between the B pole and the E pole of the triode Q2, and the triode Q2 is conducted; therefore, 3.3V voltage drop also exists between the pole B and the pole E of the triode Q1, the triode Q1 is conducted, and the pin 3 of the power supply communication socket CN1 is changed into low level.
Further, the control module comprises a chip U2, a capacitor C4, a capacitor C5, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R12 and a resistor R13;
the pin 7 of the chip U2 is connected with the first end of a resistor R7;
the pin 8 of the chip U2 is connected with the first end of the resistor R8;
the pin 9 of the chip U2 is connected with the first end of the resistor R9, and the second end of the resistor R9 and the first end of the capacitor C4 are respectively connected with the pin 3 of the power supply communication socket CN 1;
the pin 10 of the chip U2 is connected with the first end of the resistor R10, and the second end of the resistor R10 and the first end of the capacitor C5 are respectively connected with the pin 4 of the power supply communication socket CN 1;
the pin 13 of the chip U2 is connected with the first end of the resistor R12;
the pin 14 of the chip U2 is connected with a first end of a resistor R13;
the second end of the resistor R8 and the second end of the resistor R13 are respectively connected with a pin 1 of a power supply communication socket CN1, namely the second end of the resistor R8 and the second end of the resistor R13 are respectively connected with the output end of a 5V power supply, and the chip U2 adopts 5V power supply;
the second end of the resistor R7, the second end of the capacitor C4, the second end of the capacitor C5 and the second end of the resistor R12 are grounded.
Further, the model of the chip U2 is BF7612BM 28.
When the output of the pin 10 of the chip U2 of the control module is low level, the level of the pin 4 of the power supply communication socket CN1 is GND, the level of the second end of the resistor R1 is also GND, the level received by the pin 15 of the chip IC1 is also GND, and communication can be realized between the chip U2 and the chip IC 1;
when the output of the pin 10 of the chip U2 of the control module is a high level, the level of the pin 4 of the power supply communication socket CN1 is 5V, because the resistor R1 is connected in series with the resistor R3, the second end of the resistor R1 is connected with the pin 4 of the power supply communication socket CN1, the second end of the resistor R3 is grounded, a voltage drop of 5V exists between the resistor R1 and the resistor R3, the voltage across the resistor R1 is about 1.6887V, the voltage across the resistor R3 is about 3.3112V (about 3.3V), the voltage across the pin 15 of the chip IC1 is equal to the voltage across the resistor R3, and communication between the chip U2 and the chip IC1 can be realized;
therefore, the communication circuit for converting 5V into 3.3V can realize communication between the chip U2 and the chip IC 1.
The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but rather that various changes and modifications may be made without departing from the spirit and scope of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (5)
- The communication circuit for converting 1.5V into 3.3V is characterized by comprising a control module, a voltage reduction module, a communication module, a WIFI module and a power supply communication socket CN 1;the power supply communication socket CN1 is connected with the voltage reduction module and supplies power to the voltage reduction module, the power supply communication socket CN1 is connected with the communication module, and the power supply communication socket CN1 is connected with the control module;the voltage reduction module is connected with the WIFI module and supplies power to the WIFI module, and the WIFI module is connected with the communication module.
- 2. The communication circuit for converting 5V to 3.3V according to claim 1, wherein the voltage reduction module comprises a three-terminal voltage regulator U1, an electrolytic capacitor EC1 and an electrolytic capacitor EC 2;the first end of the three-terminal voltage regulator U1, the negative end of the electrolytic capacitor EC2, the negative end of the electrolytic capacitor EC1 and the pin 2 of the power supply communication socket CN1 are all grounded;the second end of the three-terminal voltage stabilizer U1 outputs 3.3V voltage, and the second end of the three-terminal voltage stabilizer U1 is connected with the positive end of the electrolytic capacitor EC 2;and the third end of the three-end voltage stabilizer U1 is respectively connected with the positive end of the electrolytic capacitor EC1 and the 1 pin of the power supply communication socket CN 1.
- 3. The 5V-to-3.3V communication circuit of claim 2, wherein the WIFI module comprises a chip IC1 and a capacitor C2;the communication module comprises a capacitor C1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1 and a triode Q2;the pin 8 of the chip IC1 is respectively connected with the second end of the three-terminal regulator U1 and the first end of the capacitor C2;the pin 9 of the chip IC1 and the second end of the capacitor C2 are both grounded;the 15 pins of the chip IC1 are respectively connected with the first end of a capacitor C1, the first end of a resistor R1 and the first end of a resistor R3;the 16 pins of the chip IC1 are respectively connected with a first end of a resistor R2 and a first end of a resistor R5;the second end of the capacitor C1 and the second end of the resistor R3 are both grounded;the second end of the resistor R1 is connected with the 4 pins of the power supply communication socket CN 1;the second end of the resistor R2 and the E pole of the triode Q2 are connected with the second end of the three-terminal regulator U1;the second end of the resistor R5 is connected with the B pole of the triode Q2;the C electrode of the triode Q2 is connected with the B electrode of the triode Q1;the E pole of the triode Q1 is grounded;the C electrode of the triode Q1 is respectively connected with the first end of the resistor R4 and the first end of the resistor R6;the second end of the resistor R4 is connected with a pin 1 of a power supply communication socket CN 1;the second end of the resistor R6 is connected with the 3-pin of the power supply communication socket CN 1.
- 4. The communication circuit for converting 5V into 3.3V according to claim 3, wherein the control module comprises a chip U2, a capacitor C4, a capacitor C5, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R12 and a resistor R13;the pin 7 of the chip U2 is connected with the first end of a resistor R7;the pin 8 of the chip U2 is connected with the first end of the resistor R8;the pin 9 of the chip U2 is connected with the first end of the resistor R9, and the second end of the resistor R9 and the first end of the capacitor C4 are respectively connected with the pin 3 of the power supply communication socket CN 1;the pin 10 of the chip U2 is connected with the first end of the resistor R10, and the second end of the resistor R10 and the first end of the capacitor C5 are respectively connected with the pin 4 of the power supply communication socket CN 1;the pin 13 of the chip U2 is connected with the first end of the resistor R12;the pin 14 of the chip U2 is connected with a first end of a resistor R13;the second end of the resistor R8 and the second end of the resistor R13 are respectively connected with a pin 1 of a power supply communication socket CN 1;the second end of the resistor R7, the second end of the capacitor C4, the second end of the capacitor C5 and the second end of the resistor R12 are grounded.
- 5. The 5V to 3.3V communication circuit according to claim 4, wherein the model of the chip U2 is BF7612BM 28.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121332659.9U CN214900657U (en) | 2021-06-15 | 2021-06-15 | 5V changes 3.3V's communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121332659.9U CN214900657U (en) | 2021-06-15 | 2021-06-15 | 5V changes 3.3V's communication circuit |
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| Publication Number | Publication Date |
|---|---|
| CN214900657U true CN214900657U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121332659.9U Active CN214900657U (en) | 2021-06-15 | 2021-06-15 | 5V changes 3.3V's communication circuit |
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| CN (1) | CN214900657U (en) |
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- 2021-06-15 CN CN202121332659.9U patent/CN214900657U/en active Active
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