CN205880574U - Intelligence soybean milk machine control circuit - Google Patents
Intelligence soybean milk machine control circuit Download PDFInfo
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- CN205880574U CN205880574U CN201620650634.6U CN201620650634U CN205880574U CN 205880574 U CN205880574 U CN 205880574U CN 201620650634 U CN201620650634 U CN 201620650634U CN 205880574 U CN205880574 U CN 205880574U
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- circuit
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- resistor
- control chip
- soy milk
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- 235000010469 Glycine max Nutrition 0.000 title abstract description 4
- 244000068988 Glycine max Species 0.000 title abstract description 4
- 235000013336 milk Nutrition 0.000 title abstract description 4
- 239000008267 milk Substances 0.000 title abstract description 4
- 210000004080 milk Anatomy 0.000 title abstract description 4
- 230000008054 signal transmission Effects 0.000 claims abstract description 4
- 235000013322 soy milk Nutrition 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 17
- 239000004065 semiconductor Substances 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 6
- 102220067365 rs143592561 Human genes 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 1
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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Abstract
The utility model relates to an intelligence soybean milk machine control circuit, include wireless communication module, main control chip and be used for wireless communication module with signal transmission's communication circuit between the main control chip, wireless communication module is supplied power by power VCC, main control chip is supplied power by power VDD, power VCC < power VDD, the communication circuit includes wireless communication module communication output circuit and communication receiving circuit through control circuit, realize that the communication signals between two kinds of different level reliably transmits, protect wireless communication module and main control chip's corresponding PORT COM not to receive voltage signal and damage simultaneously.
Description
Technical field
This utility model relates to the control field of household kitchen electric appliance, particularly relates to a kind of intelligent soy milk grinder and controls electricity
Road.
Background technology
In soy bean milk making machine industry, along with the complication of control system, the quantity of its corresponding control chip gets more and more, and this
A little control chips need again to carry out each other communication, and different control chips, it is frequently present of the situation that power supply is different,
Especially for current intelligent soy milk grinder, along with the application of WiFi module, whole intelligent soy milk grinder control system often exists
Two power supplys, WiFi module is worked by 3.3V, and the master control system of soy bean milk making machine is worked by 5V, if directly entered between 2
Row communication, due to the difference of level, certainly cannot realize communication the most reliably, and the voltage of high potential is directly connected to low
On the port of current potential, it is easily damaged the port of WiFi module.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of intelligent soy milk grinder control circuit, for different potentials
Between the communication protection circuit of communication, realize the difference communication for electric potential chip chamber the most reliably, protect PORT COM.
In order to solve above technical problem, this utility model one intelligent soy milk grinder control circuit, including wireless telecommunications
Module and Master control chip and for the communicating circuit of signal transmission between described wireless communication module and described Master control chip,
Described wireless communication module is powered by power supply VCC, and described Master control chip is powered by power vd D, described power supply VCC ＜ power supply
VDD, described communicating circuit includes that described wireless communication module communication output circuit and communication receive circuit, it is preferred that described logical
News output circuit includes level shifting circuit, and described power supply VCC level signal is converted to described electricity by described level shifting circuit
Source VDD level signal, described communication receives circuit and includes bleeder circuit, and described bleeder circuit is by described power vd D level signal
Dividing potential drop is described power supply VCC level signal.
Preferably, described level shifting circuit includes audion T1, the first pull-up resistor R7, the second pull-up resistor R6, institute
Stating audion T1 emitter stage and be electrically connected to the communication output port of described wireless communication module, described audion T1 ground level electrically connects
In described first pull-up resistor R7 one end, the described first pull-up resistor R7 other end is electrically connected to described power supply VCC, described three poles
Pipe T1 colelctor electrode described second pull-up resistor R6 one end of electrical connection and the communication receiving port of described Master control chip, described second
The pull-up resistor R6 other end electrically connects described power vd D.
Preferably, it is provided with filter between described audion T1 colelctor electrode and the described communication receiving port of described Master control chip
Ripple electric capacity C8, described filter capacitor C8 one end is electrically connected to described audion T1 colelctor electrode, and the other end is electrically connected to described power supply
Negative pole GND.
Preferably, described audion T1 is positive-negative-positive.
Preferably, described bleeder circuit includes the first divider resistance R9 and the second divider resistance R10, described first dividing potential drop electricity
Resistance R9 one end electrically connects communication receiving port and one end of described second divider resistance R10 of described wireless communication module, described
The first divider resistance R9 other end electrically connects the communication output port of described Master control chip, and described second divider resistance R10 is another
One end electrically connects described power cathode GND.
Preferably, described first divider resistance R9 and the ratio R9/R10=(VDD-VCC of the second divider resistance R10 resistance)/
VCC。
Preferably, described bleeder circuit also includes filter capacitor C7, and the electrical connection of described filter capacitor C7 one end is described wireless
The described communication receiving port of communication module, the other end electrically connects described power cathode GND.
Preferably, described level shifting circuit includes metal-oxide-semiconductor Q1, the 3rd pull-up resistor R3, the 4th pull-up resistor R4, described
Metal-oxide-semiconductor Q1 source electrode is electrically connected to the communication output port of described wireless communication module, and described metal-oxide-semiconductor Q1 grid is electrically connected to described
3rd pull-up resistor R3 one end, the described 3rd pull-up resistor R3 other end is electrically connected to described power supply VCC, described metal-oxide-semiconductor Q1 leakage
Pole electrically connects described 4th pull-up resistor R4 one end and the communication receiving port of described Master control chip, described 4th pull-up resistor
The R4 other end electrically connects described power vd D.
Preferably, described level shifting circuit also includes filter capacitor C2, and the electrical connection of described filter capacitor C2 one end is described
The described communication receiving port of Master control chip, the other end electrically connects described power cathode GND.
Preferably, described metal-oxide-semiconductor is N-channel.
By increasing communication output circuit between the communicating circuit between wireless communication module and Master control chip and leading to
News receive short circuit, it is possible to achieve the frequency converter of communication between different potentials, prevent the communication caused because of signal level difference
Abnormal problem.
By increasing communication output circuit between the communicating circuit between wireless communication module and Master control chip and leading to
News receive short circuit, can protect the port protection of low voltage power supply end, the problem preventing from causing chip port to damage because of high pressure.
Accompanying drawing explanation
The present invention is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is the logical schematic of the embodiment 1 of this utility model a kind of intelligent soy milk grinder control circuit；
Fig. 2 is the communication output circuit principle letter of the embodiment 1 of this utility model a kind of intelligent soy milk grinder control circuit
Figure；
Fig. 3 is the communication input circuit principle letter of the embodiment 1 of this utility model a kind of intelligent soy milk grinder control circuit
Figure；
Fig. 4 is the communication output circuit principle letter of the embodiment 2 of this utility model a kind of intelligent soy milk grinder control circuit
Figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in further detail:
Embodiment 1:
As it is shown in figure 1, a kind of intelligent soy milk grinder control circuit, a kind of intelligent soy milk grinder control circuit, including wireless
Communication module and Master control chip and for the communication of signal transmission between described wireless communication module and described Master control chip
Circuit, described wireless communication module powered by power supply VCC, and described Master control chip is powered by power vd D, described power supply VCC ＜
Power vd D, described communicating circuit includes that described wireless communication module communication output circuit and communication receive circuit, it is preferred that institute
Stating communication output circuit and include level shifting circuit, described power supply VCC level signal is converted to institute by described level shifting circuit
Stating power vd D level signal, described communication receives circuit and includes bleeder circuit, and described bleeder circuit is by described power supply VDD level
Signal dividing potential drop is described power supply VCC level signal.
As shown in Figures 2 and 3, in the present embodiment, communication output circuit and communication receive circuit, and physical circuit connects as follows:
1, communication output circuit:
Described level shifting circuit includes audion T1, the first pull-up resistor R7, the second pull-up resistor R6, described audion
T1 emitter stage is electrically connected to the communication output port of described wireless communication module, and described audion T1 ground level is electrically connected to described
One pull-up resistor R7 one end, the described first pull-up resistor R7 other end is electrically connected to described power supply VCC, described audion T1 current collection
Pole electrically connects described second pull-up resistor R6 one end and the communication receiving port of described Master control chip, described second pull-up resistor
The R6 other end electrically connects described power vd D.Described audion T1 colelctor electrode and the described communication receiving terminal of described Master control chip
Being provided with filter capacitor C8 between Kou, described filter capacitor C8 one end is electrically connected to described audion T1 colelctor electrode, and the other end is electrically connected
It is connected to described power cathode GND.
Operation principle: when wireless module WTXD exports high level, VBE=0V, wants less than the VBE voltage of triode ON
Asking (the VBE representative value of positive-negative-positive triode T1 is 0.7V) triode T1 to end, now the C pole of audion is due to the existence of R6,
MRXD receives high level VCC1 signal；When WTXD output low level, audion VBE voltage is higher than conducting voltage, audion
Conducting, the voltage that voltage is VCE (representative value 0.16V, maximum 0.6V) that now MRXD receives, therefore MCU recognizes low level letter
Number.By above 2 kinds of states, it is achieved from low-pressure end to the signals transmission of high-pressure side.
2, communication reception circuit:
Receive protection circuit and include that bleeder circuit, described bleeder circuit include the first divider resistance R9 and the second divider resistance
R10, described first divider resistance R9 one end electrically connects the communication receiving port of described wireless communication module and described second dividing potential drop
One end of resistance R10, the described first divider resistance R9 other end electrically connects the communication output port of described Master control chip, described
The second divider resistance R10 other end electrically connects described power cathode GND.Described first divider resistance R9 and the second divider resistance
The ratio R9/R10=(VDD-VCC of the resistance of R10)/VCC.Described bleeder circuit also includes filter capacitor C7, described filter capacitor C7
One end electrically connects the described communication receiving port of described wireless communication module, and the other end electrically connects described power cathode GND.
MCU is when wireless module sends signal.R9 and R10 forms bleeder circuit, and when exporting high level, WRXD receives
Voltage be VDD*R10/ (R10+R9), select herein R10 be 2K, R9 be 1K, therefore the WRXD signal amplitude that receives of termination is
About 3.33V, and the supply voltage of wireless communication module (WiFi module) is 3.3V, meets design requirement, and when exporting low electricity
At ordinary times, WRXD termination receives low level signal.
R9, R10 resistance selects: be that vdd voltage is converted to VCC voltage in view of bleeder circuit herein, thus R9 with
The ratio of the resistance of R10 is chosen as R9/R10=(VDD-VCC)/VCC, two resistance values can not be excessive herein, crosses conference and causes communication
Time reaction rate the slowest, it is proposed that select 1K and 2K value；Simultaneously take account of power-failure memory, when systems inspection to power down, need
The TXD mouth of MCU is arranged output low level, it is ensured that the power-failure memory time.
By above 2 kinds of states, it is achieved from high pressure vdd terminal to the signals transmission of low pressure VCC end.
It is emphasized that described audion T1 uses high-frequency triode, its filter capacitor C7, C8 use 1nF and following
The electric capacity (different communication baud rate, capacitance selects difference) of capacitance.
Embodiment 2:
The present embodiment is with the difference of above-described embodiment 1, and described communication output circuit physical circuit is different, concrete such as figure
Shown in 4, described level shifting circuit includes metal-oxide-semiconductor Q1, the 3rd pull-up resistor R3, the 4th pull-up resistor R4, described metal-oxide-semiconductor Q1 source
Pole is electrically connected to the communication output port of described wireless communication module, and described metal-oxide-semiconductor Q1 grid is electrically connected to described 3rd pull-up
Resistance R3 one end, the described 3rd pull-up resistor R3 other end is electrically connected to described power supply VCC, described metal-oxide-semiconductor Q1 and drains electrical connection
Described 4th pull-up resistor R4 one end and the communication receiving port of described Master control chip, the described 4th pull-up resistor R4 other end
Electrically connect described power vd D.Described level shifting circuit also includes filter capacitor C2, described filter capacitor C2 one end electrical connection institute
Stating the described communication receiving port of Master control chip, the other end electrically connects described power cathode GND.Described metal-oxide-semiconductor is N-channel.
Operation principle: G pole (grid G ate) connects pull-up resistor R3, S pole (source electrode source) connects the defeated of wireless module
Going out port, when wireless module output low level, VGS=3.3V, metal-oxide-semiconductor turns on, and the voltage that MRXD receives is RDS/(RDS+
R4), owing to when metal-oxide-semiconductor turns on, RDS generally is 100m Ω, therefore VMRXD voltage is about 0.05mV, when XTXD exports high level
During 3.3V, VGS is less than its conducting voltage, and MOS is in cut-off state, VMRXD=5V.
.By above 2 kinds of states, it is achieved from low-pressure end to the signals transmission of high-pressure side.
It is emphasized that protection scope of the present invention is including but not limited to above-mentioned detailed description of the invention.It is right to it should be pointed out that,
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to make some deformation and improvement, this
Also should be considered to belong to protection scope of the present invention a bit.
Claims (10)
1. an intelligent soy milk grinder control circuit, including wireless communication module and Master control chip and for described wireless telecommunications
The communicating circuit of signal transmission between module and described Master control chip, described wireless communication module is powered by power supply VCC, described
Master control chip is powered by power vd D, and described power supply VCC ＜ power vd D, described communicating circuit includes described wireless communication module
Communication output circuit and communication receive circuit, it is characterised in that described communication output circuit includes level shifting circuit, described electricity
Described power supply VCC level signal is converted to described power vd D level signal by flat change-over circuit, and described communication receives circuit and includes
Bleeder circuit, described power vd D level signal dividing potential drop is described power supply VCC level signal by described bleeder circuit.
Intelligent soy milk grinder control circuit the most according to claim 1, it is characterised in that described level shifting circuit includes
Audion T1, the first pull-up resistor R7, the second pull-up resistor R6, described audion T1 emitter stage is electrically connected to described wireless telecommunications
The communication output port of module, described audion T1 ground level is electrically connected to described first pull-up resistor R7 one end, on described first
The pull-up resistor R7 other end is electrically connected to described power supply VCC, and described audion T1 colelctor electrode electrically connects described second pull-up resistor R6
The communication receiving port of one end and described Master control chip, the described second pull-up resistor R6 other end electrically connects described power vd D.
Intelligent soy milk grinder control circuit the most according to claim 2, it is characterised in that described audion T1 colelctor electrode with
Being provided with filter capacitor C8 between the described communication receiving port of described Master control chip, described filter capacitor C8 one end is electrically connected to
Described audion T1 colelctor electrode, the other end is electrically connected to described power cathode GND.
Intelligent soy milk grinder control circuit the most according to claim 2, it is characterised in that described audion T1 is positive-negative-positive.
Intelligent soy milk grinder control circuit the most according to claim 2, it is characterised in that described bleeder circuit includes first
Divider resistance R9 and the second divider resistance R10, described first divider resistance R9 one end electrically connects the logical of described wireless communication module
News receiving port and one end of described second divider resistance R10, the described first divider resistance R9 other end electrically connects described master control
The communication output port of coremaking sheet, the described second divider resistance R10 other end electrically connects described power cathode GND.
Intelligent soy milk grinder control circuit the most according to claim 5, it is characterised in that described first divider resistance R9 with
The ratio R9/R10=(VDD-VCC of the resistance of the second divider resistance R10)/VCC.
Intelligent soy milk grinder control circuit the most according to claim 6, it is characterised in that described bleeder circuit also includes filter
Ripple electric capacity C7, described filter capacitor C7 one end electrically connects the described communication receiving port of described wireless communication module, other end electricity
Connect described power cathode GND.
Intelligent soy milk grinder control circuit the most according to claim 1, it is characterised in that described level shifting circuit includes
Metal-oxide-semiconductor Q1, the 3rd pull-up resistor R3, the 4th pull-up resistor R4, described metal-oxide-semiconductor Q1 source electrode is electrically connected to described wireless communication module
Communication output port, described metal-oxide-semiconductor Q1 grid is electrically connected to described 3rd pull-up resistor R3 one end, described 3rd pull-up resistor
The R3 other end is electrically connected to described power supply VCC, described metal-oxide-semiconductor Q1 drain electrode and electrically connects described 4th pull-up resistor R4 one end and described
The communication receiving port of Master control chip, the described 4th pull-up resistor R4 other end electrically connects described power vd D.
Intelligent soy milk grinder control circuit the most according to claim 8, it is characterised in that described level shifting circuit also wraps
Including filter capacitor C2, described filter capacitor C2 one end electrically connects the described communication receiving port of described Master control chip, the other end
Electrically connect described power cathode GND.
Intelligent soy milk grinder control circuit the most according to claim 9, it is characterised in that described metal-oxide-semiconductor is N-channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620650634.6U CN205880574U (en) | 2016-06-28 | 2016-06-28 | Intelligence soybean milk machine control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620650634.6U CN205880574U (en) | 2016-06-28 | 2016-06-28 | Intelligence soybean milk machine control circuit |
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| Publication Number | Publication Date |
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| CN205880574U true CN205880574U (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620650634.6U Active CN205880574U (en) | 2016-06-28 | 2016-06-28 | Intelligence soybean milk machine control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636316A (en) * | 2020-12-17 | 2021-04-09 | 潍柴动力股份有限公司 | Urea pump communication circuit and urea pump |
| CN114006628A (en) * | 2021-10-27 | 2022-02-01 | Tcl家用电器（合肥）有限公司 | Communication circuit and refrigerator |
-
2016
- 2016-06-28 CN CN201620650634.6U patent/CN205880574U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636316A (en) * | 2020-12-17 | 2021-04-09 | 潍柴动力股份有限公司 | Urea pump communication circuit and urea pump |
| CN114006628A (en) * | 2021-10-27 | 2022-02-01 | Tcl家用电器（合肥）有限公司 | Communication circuit and refrigerator |
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