CN213715754U - Electronic equipment and control circuit for determining key value through sampling circuit voltage - Google Patents
Electronic equipment and control circuit for determining key value through sampling circuit voltage Download PDFInfo
- Publication number
- CN213715754U CN213715754U CN202023288129.7U CN202023288129U CN213715754U CN 213715754 U CN213715754 U CN 213715754U CN 202023288129 U CN202023288129 U CN 202023288129U CN 213715754 U CN213715754 U CN 213715754U
- Authority
- CN
- China
- Prior art keywords
- control
- controller
- voltage
- resistors
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Input From Keyboards Or The Like (AREA)
Abstract
The utility model relates to an electronic device and a control circuit for determining key values by sampling circuit voltage, wherein the control circuit comprises a plurality of resistors, a plurality of control keys and a controller; each of the plurality of resistors is connected in series, one end of each resistor is connected with electricity, and the other end of each resistor is grounded; a control key is connected between the two connected resistors, and all the control keys are connected in parallel and then connected to the controller; and when the control keys with different numbers are switched on, different control instructions are sent to the controller. Control circuit in this application is simple, and the advantage is obvious, only needs several resistances to accomplish the mode that a plurality of voltages were gathered, inputs the controller chip after gathering the completion voltage, compares by the inside impulse voltage who produces of controller and input voltage, finds the button function that the voltage corresponds, carries out command control, accomplishes user's instruction, and control process just can accomplish whole sampling actions as long as a pin of controller.
Description
Technical Field
The utility model relates to a control circuit, more specifically say, relate to an electronic equipment and confirm control circuit of key value through sampling circuit voltage.
Background
Keyboard, remote controller, control panel are mostly the matrix arrangement mode commonly used in the existing market, need occupy a lot of singlechip pins, for example the keyboard of a 9 keys, just need 6 singlechip pins.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the loaded down with trivial details defect of the above-mentioned control of prior art, provide an electronic equipment and through the control circuit of sampling circuit voltage determination key value.
The utility model provides a technical scheme that its technical problem adopted is: constructing a control circuit for determining key values through sampling circuit voltage, wherein the control circuit comprises a plurality of resistors, a plurality of control keys and a controller;
each of the plurality of resistors is connected in series, one end of each resistor is connected with electricity, and the other end of each resistor is grounded;
the control key is connected between the two connected resistors, and the control keys are connected to the controller after being connected in parallel;
and when the control keys with different numbers are switched on, different control instructions are sent to the controller.
Preferably, the resistances of the resistors are the same.
Preferably, the resistances of the resistors are different.
Preferably, each control key is one of a knife switch, a key switch and a toggle switch.
Preferably, the controller includes a comparator, a database storing reference voltages, and a processor in communication connection with the comparator, each control key is connected to the comparator after being connected in parallel, so as to input a control voltage to the processor, and the processor compares the control voltage with the reference voltages in the database to obtain a determined control signal.
An electronic device comprises the control circuit which determines the key value by sampling the circuit voltage.
Preferably, the electronic device is one of a keyboard, a remote controller and a control panel.
Implement the utility model discloses an electronic equipment reaches control circuit through sampling circuit voltage determination key value has following beneficial effect: control circuit in this application is simple, and the advantage is obvious, only needs several resistances to accomplish the mode that a plurality of voltages were gathered, inputs the controller chip after gathering the completion voltage, compares by the inside impulse voltage who produces of controller and input voltage, finds the button function that the voltage corresponds, carries out command control, accomplishes user's instruction, and control process just can accomplish whole sampling actions as long as a pin of controller.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic circuit diagram of an electronic device and a control circuit for determining a key value by sampling a circuit voltage according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the electronic device in a preferred embodiment of the present invention is one of a keyboard, a remote controller, and a control panel, and includes a control circuit for determining a key value by sampling a circuit voltage.
The control circuit for determining the key value through the voltage of the sampling circuit comprises a plurality of resistors, a plurality of control keys and a controller 1; each of the plurality of resistors is connected in series, one end of each resistor is connected with electricity, and the other end of each resistor is grounded; a control key is connected between the two connected resistors, and all the control keys are connected to the controller 1 after being connected in parallel; when a different number of control keys are turned on, different control commands are issued to the controller 1.
Control circuit in this application is simple, and the advantage is obvious, only needs several resistances to accomplish the mode that a plurality of voltages were gathered, inputs 1 chip of controller after gathering the completion voltage, compares by impulse voltage and the input voltage of 1 inside productions of controller, finds the button function that voltage corresponds, carries out command control, accomplishes user's instruction, and control process just can accomplish whole sampling actions as long as 1 pin of controller.
In some embodiments, the resistances of the resistors may be the same, and certainly, the resistances of the resistors may also be different, so as to ensure that different voltages are output after each control key is turned off and on.
Furthermore, each control key can be one of a knife switch, a key switch and a toggle switch, and the switch control is realized by selecting a proper mode according to different application occasions.
In some embodiments, the controller 1 includes a comparator 11, a database 12 storing reference voltages, and a processor 13 communicatively connected to the comparator 11, respectively.
The control keys are connected in parallel and then connected to the comparator 11 to input a control voltage to the processor 13, and the processor 13 compares the control voltage with a reference voltage in the database 12 to obtain a determined control signal.
Referring to the drawings, VCC forms different voltage values at nodes between 2 connected resistors, such as V1, V2, V3... Vn shown in fig. 1, from high to low, through a plurality of series resistors to ground.
We connect a control at each voltage node location and the user assumes that pressing control K1, at which time control K1 switches will input the voltage at node V1, i herein designated KEY _ OUT as shown, into controller 1.
In the controller 1, the processor continuously generates a pulse voltage from high to low, and when the input voltage value KED _ OUT is compared with the pulse voltage value by the comparator 11, the controller 1 can identify what the input voltage value is.
The key value corresponding to the preset voltage is found through the database 12 which can be compiled inside, so that the function which the user wants to realize is identified, and the function is converted into a binary instruction code and is controlled by the processor according to the corresponding function.
It is to be understood that the above-described respective technical features may be used in any combination without limitation.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (7)
1. A control circuit for determining key values by sampling circuit voltages is characterized by comprising a plurality of resistors, a plurality of control keys and a controller (1);
each of the plurality of resistors is connected in series, one end of each resistor is connected with electricity, and the other end of each resistor is grounded;
the control key is connected between the two connected resistors, and the control keys are connected to the controller (1) after being connected in parallel;
and when the control keys with different numbers are switched on, different control instructions are sent to the controller (1).
2. The control circuit for determining a key value by sampling a circuit voltage of claim 1 wherein the resistances of the resistors are the same.
3. The control circuit for determining a key value by sampling a circuit voltage of claim 1, wherein the resistances of the resistors are different.
4. The control circuit for determining a key value by sampling a circuit voltage of claim 1, wherein each of the control keys is one of a knife switch, a key switch, and a toggle switch.
5. The control circuit for determining a key value by sampling a circuit voltage according to any one of claims 1 to 4, wherein the controller (1) comprises a comparator (11), a database (12) storing reference voltages, and a processor (13) respectively connected in communication with the comparator (11), each control key is connected to the comparator (11) in parallel to input a control voltage to the processor (13), and the processor (13) compares the control voltage with the reference voltages in the database (12) to obtain the determined control signal.
6. An electronic device comprising the control circuit of any of claims 1 to 5 for determining a key value by sampling a circuit voltage.
7. The electronic device of claim 6, wherein the electronic device is one of a keyboard, a remote control, and a control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023288129.7U CN213715754U (en) | 2020-12-30 | 2020-12-30 | Electronic equipment and control circuit for determining key value through sampling circuit voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023288129.7U CN213715754U (en) | 2020-12-30 | 2020-12-30 | Electronic equipment and control circuit for determining key value through sampling circuit voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213715754U true CN213715754U (en) | 2021-07-16 |
Family
ID=76790299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023288129.7U Active CN213715754U (en) | 2020-12-30 | 2020-12-30 | Electronic equipment and control circuit for determining key value through sampling circuit voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213715754U (en) |
-
2020
- 2020-12-30 CN CN202023288129.7U patent/CN213715754U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8402313B1 (en) | Reconfigurable testing system and method | |
| KR101694087B1 (en) | Method for determining active input elements of an input arrangement and input arrangement | |
| CN111880513A (en) | Test circuit and test method of device to be tested | |
| CN213715754U (en) | Electronic equipment and control circuit for determining key value through sampling circuit voltage | |
| CN105934898B (en) | A kind of analog-digital converter protection circuit and its control method, controller | |
| US20060284660A1 (en) | Reset device and display device having same | |
| CN103941616A (en) | Multifunctional user-defined switch | |
| CN109709373B (en) | Signal self-adaptive acquisition circuit and acquisition method | |
| CN116131593A (en) | Power-down control method and device, storage medium and image signal generator | |
| CN210154028U (en) | Dial identification circuit and air conditioner applying same | |
| CN213240428U (en) | Intelligent switch circuit breaker testing arrangement | |
| CN211063597U (en) | Key scanning circuit based on AD sampling and electronic equipment | |
| CN110470927B (en) | Key testing method and key testing device | |
| CN212484124U (en) | Variable resistance simulation device | |
| CN211628057U (en) | Switch device | |
| CN207995245U (en) | The start control circuit and television set of television set | |
| CN105242595A (en) | Switching apparatus and switching method of analog input signals | |
| CN110708055A (en) | Chip working state selection circuit, method and application thereof | |
| CN107066001B (en) | For controlling in the equipment with unknown current to the electric current in the load of voltage characteristic | |
| US8766622B2 (en) | Voltage measuring apparatus for buck circuit | |
| CN210958339U (en) | Digital combined key circuit | |
| CN109714053A (en) | Terminal device, the system and method for digital communication are carried out using analog signal pin | |
| CN214409235U (en) | Full parameter one-key testing device of module power supply | |
| CN219513780U (en) | Oscilloscope input resistor protection device | |
| CN207410331U (en) | Trigger circuit and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |