CN213070117U - Remote controller power supply and key circuit - Google Patents
Remote controller power supply and key circuit Download PDFInfo
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- CN213070117U CN213070117U CN202021549774.7U CN202021549774U CN213070117U CN 213070117 U CN213070117 U CN 213070117U CN 202021549774 U CN202021549774 U CN 202021549774U CN 213070117 U CN213070117 U CN 213070117U
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Abstract
The utility model discloses a remote controller power supply and a key circuit, which comprises a power supply circuit and a key circuit; power supply circuit is including the anodal B +, PMOS pipe Q1 and the singlechip power VCC of battery that establish ties in proper order, KEY circuit is including a plurality of branch roads of parallelly connected, including the MOS pipe control point of establishing ties in proper order in one of them branch road, first diode and triode T2, battery anodal B + is connected with MOS pipe control point KENT through resistance R1, triode T2's base is passed through resistance R9 and is connected with singlechip output control point KCRL, including the second diode and the button KEY of establishing ties in proper order in other branch roads, and be connected with singlechip pin input point K through the other third diode that connects. When a KEY is pressed, the KENT potential is pulled down, the PMOS tube Q1 is conducted, the power supply VCC of the single chip microcomputer is electrified, the single chip microcomputer starts to work, and the PMOS tube Q1 is locked in a conducting state through the triode T2. After signal transmission is finished, the triode T2 is released, the PMOS tube Q1 is closed, and power supply of a battery is cut off.
Description
Technical Field
The utility model relates to a remote controller technical field, concretely relates to remote controller power and keying circuit.
Background
Wireless remote controls, as the name implies, are devices for remotely controlling machines and were first developed in 1898 by nigulas tesla in the united states. The common market has 2, one is infrared Remote Control mode (IR Remote Control) commonly used by household appliances, and the other is radio Remote Control mode (RF Remote Control) commonly used by anti-theft alarm equipment, door and window Remote Control, automobile Remote Control and the like.
The power supply and the key circuit of the remote controller in the traditional radio remote control mode mostly have the problem of poor stability, and the stability and the safety of the wireless remote controller are very important for equipment which is remotely controlled by the radio remote control mode, such as a climbing-free device.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a remote controller power and keying circuit that stability is good, and the security is high.
In order to solve the technical problem, the utility model provides a remote controller power supply and key circuit, which comprises a power circuit and a key circuit;
the power supply circuit comprises a battery anode B +, a PMOS (P-channel metal oxide semiconductor) tube Q1 and a single chip microcomputer power supply VCC which are sequentially connected in series, the KEY circuit comprises a plurality of branches connected in parallel, one branch comprises an MOS (metal oxide semiconductor) tube control point, a first diode and a triode T2 which are sequentially connected in series, the battery anode B + is connected with the MOS tube control point KENT through a resistor R1, the base of the triode T2 is connected with a single chip microcomputer output control point KCRL through a resistor R9, and the other branches comprise a second diode and a KEY KEY which are sequentially connected in series and are connected with a single chip microcomputer pin input point K through a bypass third diode;
when a KEY is pressed, the KENT potential is pulled down, the PMOS tube Q1 is conducted, the power supply VCC of the single chip microcomputer is electrified, the single chip microcomputer starts to work, and the PMOS tube Q1 is locked in a conducting state through the triode T2.
In a preferred embodiment of the present invention, the MOS transistor control point KENT is connected to the PMOS transistor and the single chip VCC through a resistor R2.
In a preferred embodiment of the present invention, the single chip power VCC is grounded through a filter capacitor.
In a preferred embodiment of the present invention, the filter capacitor includes capacitors C4 and C5 connected in parallel.
In a preferred embodiment of the present invention, the capacitors C4 and C5 are both 0.1 u.
In a preferred embodiment of the present invention, the filter capacitor further includes a capacitor C7 connected in parallel with the capacitors C4 and C5.
In a preferred embodiment of the present invention, the resistor R9 is 10K.
In a preferred embodiment of the present invention, the PMOS transistor Q1 is FDN 304P.
In a preferred embodiment of the present invention, the number of the other branches is three.
In order to solve the technical problem, the utility model also provides a remote controller, it contains the aforesaid arbitrary remote controller power and keying circuit.
The utility model has the advantages that:
the utility model discloses remote controller power and keying circuit simple structure, when button KEY presses down, the KENT electric potential drop-down, PMOS pipe Q1 switches on, and single chip microcomputer power VCC circular telegram, singlechip begin work to through triode T2 with PMOS pipe Q1 locking at the on-state. After signal transmission is finished, the triode T2 is released, the PMOS tube Q1 is closed, and power supply of a battery is cut off.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of a power supply and a key circuit of a remote controller according to a preferred embodiment of the present invention.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Examples
The embodiment of the utility model discloses remote controller power and keying circuit, as shown in fig. 1, including power supply circuit and keying circuit.
The power supply circuit comprises a battery anode B +, a PMOS (P-channel metal oxide semiconductor) tube Q1 and a single chip microcomputer power supply VCC which are sequentially connected in series, the KEY circuit comprises a plurality of branches connected in parallel, one branch comprises an MOS tube control point, a first diode and a triode T2 which are sequentially connected in series, the battery anode B + is connected with the MOS tube control point KENT through a resistor R1, the base of the triode T2 is connected with a single chip microcomputer output control point KCRL through a resistor R9, and the other branches comprise a second diode and a KEY KEY which are sequentially connected in series and are connected with a single chip microcomputer pin input point K through a bypass third diode. The first diode is D4.
The PMOS transistor controls the power VCC. In one embodiment, the PMOS transistor Q1 is model FDN 304P.
The resistor R1 provides bias voltage for the PMOS transistor.
The MOS tube control point KENT is connected between the PMOS tube and the single chip microcomputer power supply VCC through a resistor R2. The resistor R2 is a vibration-damping resistor to prevent oscillation of the G pole of the PMOS tube.
In this embodiment, the number of the other branches is three. The first branch comprises a diode D1, a diode D5 and a KEY1, a bypass diode D5 is connected with a pin input point K1 of the single chip microcomputer, the second branch comprises a diode D2, a diode D6 and a KEY2, the bypass diode D6 is connected with a pin input point K2 of the single chip microcomputer, the third branch comprises a diode D3, a diode D7 and a KEY3, and the bypass diode D7 is connected with a pin input point K3 of the single chip microcomputer.
Diodes D1, D2, D3 are used to prevent KEY interference, and without diodes D1, D2, D3, when KEY1 is pressed, K1, K2, K3 are all pulled to GND, so that it is not possible to identify which KEY was pressed.
The diodes D5, D6, D7 are used to prevent leakage. Without the diode D5, the battery discharges through B + → R1 → D1 → K1 → single-chip microcomputer → GND.
The singlechip simulates a fourth key by controlling a triode T2, and pulls down the MOS tube control point KENT by the singlechip when other keys are released. And when the triode T2 is not conducted, the battery is prevented from discharging through the single chip microcomputer output control point KCRL loop.
In one embodiment, the diodes D1-D7 are of type LL 4148. The transistor T2 is of type BC 817.
In other embodiments, the number of other branches may be set as desired.
The single chip microcomputer power supply VCC is grounded through a filter capacitor. The filter capacitor comprises capacitors C4 and C5 which are connected in parallel, and specifically, the capacitors C4 and C5 are both 0.1 u.
In one embodiment, the filter capacitor further includes a capacitor C7 connected in parallel with the capacitors C4 and C5.
In one embodiment, the resistor R9 is 10K.
When the KEY1 is pressed, the KENT potential is pulled down to the ground, the PMOS transistor Q1 is turned on, the power supply VCC of the single chip microcomputer is turned on, the single chip microcomputer starts to work, the single chip microcomputer sets the output control point KCRL of the single chip microcomputer to be a high level at first, the triode T2 is turned on, the control right of the MOS transistor control point KENT is taken over, and the PMOS transistor Q1 is locked in a turned-on state through the triode T2, so that self-holding is achieved.
When the singlechip detects that the pin input point K1 of the singlechip is at low level, K2 and K3 are pulled up to high level, namely, remote control signals are transmitted according to a set program.
When the KEY1 is released, the single chip microcomputer detects that a pin input point K1 of the single chip microcomputer becomes a high level, the sending of a remote control signal is finished, a control point KCRL of the single chip microcomputer is set to be a low level, the triode T2 is disconnected, the control point KENT of the MOS tube restores to the high level, the PMOS tube Q1 is disconnected, and the power failure is completed.
The utility model also discloses a remote controller, it contains above-mentioned remote controller power and keying circuit.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (9)
1. A remote controller power supply and key circuit characterized by: comprises a power circuit and a key circuit;
the power supply circuit comprises a battery anode B +, a PMOS (P-channel metal oxide semiconductor) tube Q1 and a single chip microcomputer power supply VCC which are sequentially connected in series, the KEY circuit comprises a plurality of branches connected in parallel, one branch comprises an MOS (metal oxide semiconductor) tube control point, a first diode and a triode T2 which are sequentially connected in series, the battery anode B + is connected with the MOS tube control point KENT through a resistor R1, the base of the triode T2 is connected with a single chip microcomputer output control point KCRL through a resistor R9, and the other branches comprise a second diode and a KEY KEY which are sequentially connected in series and are connected with a single chip microcomputer pin input point K through a bypass third diode;
when a KEY is pressed, the KENT potential is pulled down, the PMOS tube Q1 is conducted, the power supply VCC of the single chip microcomputer is electrified, the single chip microcomputer starts to work, and the PMOS tube Q1 is locked in a conducting state through the triode T2.
2. The remote control power supply and key circuit of claim 1 wherein: the MOS tube control point KENT is connected between the PMOS tube and a single chip microcomputer power supply VCC through a resistor R2.
3. The remote control power supply and key circuit of claim 1 wherein: and the single chip microcomputer power supply VCC is grounded through a filter capacitor.
4. A remote control power supply and button circuit as defined in claim 3, wherein: the filter capacitor comprises capacitors C4 and C5 which are connected in parallel with each other.
5. The remote control power supply and key circuit of claim 4 wherein: and the capacitors C4 and C5 are both 0.1 u.
6. The remote control power supply and key circuit of claim 4 wherein: the filter capacitor further comprises a capacitor C7 connected in parallel with the capacitors C4 and C5.
7. The remote control power supply and key circuit of claim 1 wherein: the resistance R9 is 10K.
8. The remote control power supply and key circuit of claim 1 wherein: the model of the PMOS tube Q1 is FDN 304P.
9. The remote control power supply and key circuit of claim 1 wherein: the number of the other branches is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021549774.7U CN213070117U (en) | 2020-07-30 | 2020-07-30 | Remote controller power supply and key circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021549774.7U CN213070117U (en) | 2020-07-30 | 2020-07-30 | Remote controller power supply and key circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213070117U true CN213070117U (en) | 2021-04-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021549774.7U Active CN213070117U (en) | 2020-07-30 | 2020-07-30 | Remote controller power supply and key circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213070117U (en) |
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2020
- 2020-07-30 CN CN202021549774.7U patent/CN213070117U/en active Active
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