CN213152024U - Power-on automatic starting circuit for terminal equipment and terminal equipment - Google Patents
Power-on automatic starting circuit for terminal equipment and terminal equipment Download PDFInfo
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- CN213152024U CN213152024U CN202022529477.2U CN202022529477U CN213152024U CN 213152024 U CN213152024 U CN 213152024U CN 202022529477 U CN202022529477 U CN 202022529477U CN 213152024 U CN213152024 U CN 213152024U
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- 230000005611 electricity Effects 0.000 abstract description 6
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- 238000012986 modification Methods 0.000 description 2
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Abstract
The utility model provides an automatic start circuit of last electricity and terminal equipment for terminal equipment, the automatic start circuit of last electricity includes electric capacity, triode and first switch, the one end and the power electricity of electric capacity are connected, the other end of electric capacity is connected with the base electricity of triode, the projecting pole ground connection of triode, the collecting electrode of triode has first node end after being connected with the one end electricity of first switch, the other end ground connection of first switch, first switch is normally open state, first node end is used for connecting external terminal, when having realized the power, terminal equipment is automatic to be started and can not start repeatedly when manual shutdown, the data loss of terminal equipment because of starting repeatedly has been avoided.
Description
Technical Field
The utility model relates to an automatic start circuit technical field, in particular to last electric automatic start circuit and terminal equipment for terminal equipment.
Background
In order to improve the use experience of users, most terminal devices are additionally provided with a power-on automatic start-up circuit, namely, the terminal devices can be started up without pressing a physical power-on and shut-down key after being powered on, but after the power-on automatic start-up of the conventional power-on automatic start-up circuit is completed, when the terminal devices are powered off by using the physical power-on and shut-down key under certain specific conditions, if the device is debugged, the terminal devices are repeatedly started up because the power-on signal level is always in a start-up state.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a go up automatic start circuit and terminal equipment for terminal equipment in order to overcome the defect that the automatic start circuit of electricity appears starting repeatedly when manual shutdown among the prior art.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
a power-on automatic starting circuit comprises a capacitor, a triode and a first switch;
one end of the capacitor is electrically connected with a power supply, the other end of the capacitor is electrically connected with a base electrode of the triode, an emitting electrode of the triode is grounded, a collector electrode of the triode is electrically connected with one end of the first switch and then is provided with a first node end, the other end of the first switch is grounded, and the first switch is in a normally open state;
the first node end is used for connecting an external terminal.
Preferably, when the power supply is powered on, the triode is turned on, so that the output signal of the first node end is switched from a preset high level to a low level.
Preferably, when the first switch is closed, the first node end is short-circuited to ground.
Preferably, the power-on auto-start circuit further comprises a second switch, the second switch is electrically connected between the other end of the capacitor and the base of the triode, and the second switch is in a normally-off state;
preferably, when the second switch is turned off, the triode is turned off.
Preferably, the power-on auto-on circuit further comprises a resistor, and the resistor is electrically connected between the other end of the capacitor and the base of the triode.
Preferably, the power-on auto-start circuit further comprises a light emitting diode, an anode of the light emitting diode is electrically connected with the other end of the capacitor, and a cathode of the light emitting diode is grounded.
Preferably, the power supply comprises any one of a battery, an external power supply, and a GPIO (general purpose input/output port) high level pin of an MCU (micro control unit).
A terminal device comprises the power-on automatic starting circuit.
The utility model discloses an actively advance the effect and lie in: the utility model realizes that the triode is conducted to output a starting signal when the power supply is powered on by arranging the capacitor, the triode and the first switch, and completes the automatic starting when the power supply is powered on; when the capacitor is discharged after being charged, the triode is cut off, and a shutdown signal is output when the first switch is closed, so that manual shutdown is completed; the terminal equipment is automatically started up and cannot be repeatedly started up when being manually turned off when the power supply is powered on, and data loss caused by repeated starting up of the terminal equipment is avoided.
Drawings
Fig. 1 is a schematic diagram of a structure of a power-on auto-start circuit according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a structure of a power-on auto-start circuit according to embodiment 2 of the present invention.
Detailed Description
The present invention will be more clearly and completely described below with reference to the accompanying drawings, which are used to illustrate preferred embodiments of the present invention, but not to limit the scope of the present invention.
Example 1
Embodiment 1 provides a power-on auto-on circuit. Specifically, referring to fig. 1, the circuit includes a capacitor C1, a transistor Q1, and a first switch S1.
One end of the capacitor C1 is electrically connected with a power supply, the other end of the capacitor C1 is electrically connected with the base electrode of the triode Q1, the emitting electrode of the triode Q1 is grounded, the collecting electrode of the triode Q1 is electrically connected with one end of the first switch S1 and then is provided with a first node end, the other end of the first switch S1 is grounded, and the first switch S1 is in a normally open state.
Specifically, the first switch S1 is any one of a push switch, a toggle switch, a push switch, and a boat switch.
Specifically, the first node is used for connecting an external terminal device.
When a power supply is powered on, the capacitor C1 is charged, a circuit loop formed by the capacitor C1 and the triode Q1 is conducted, the triode Q1 is in a conducting state, a collector and an emitter of the triode Q1 are conducted and grounded, an output signal of the first node end is switched from a preset high level to a low level, at the moment, a low level signal of the first node end can be used as a starting signal to trigger the terminal equipment to complete starting, and the first node end is recovered to the high level after the starting is completed; the capacitor C1 discharges after the charging process is finished, at the moment, a circuit loop formed by the capacitor C1 and the triode Q1 is disconnected, and the triode Q1 is in a cut-off state; when the terminal device needs to be debugged and manually turned off, the first switch S1 is closed, the first node end is grounded in a short circuit mode, an output signal of the first node end is switched from a high level to a low level, at this time, the low level signal of the first node end can be used as a turn-off signal to trigger the terminal device to complete turn-off, and the first node end returns to the high level after the turn-off is completed. Specifically, the power supply comprises any one of a battery, an external power supply and a GPIO high-level pin of the MCU.
Specifically, the transistor Q1 may selectively use an NPN-type triode or a PNP-type triode according to requirements, and the transistor Q1 in this embodiment is an NPN-type triode.
The power-on automatic start-up circuit in the embodiment can realize automatic start-up when the power supply of the terminal equipment is powered on, and also avoids data loss caused by repeated start-up of the terminal equipment when the terminal equipment is manually powered off.
Example 2
Specifically, the resistor R1 is electrically connected between the other end of the capacitor C1 and the base of the transistor Q1.
Specifically, the anode of the led L1 is electrically connected to the other end of the capacitor C1, and the cathode of the led L1 is grounded.
Specifically, the second switch S2 is electrically connected between the other end of the capacitor C1 and the base of the transistor Q1, and the second switch S2 is in a normally-off state.
Specifically, when the second switch S2 is turned off, the circuit loop formed by the capacitor C1 and the transistor Q1 is turned off, and the transistor Q1 is in a cut-off state.
Specifically, the first switch S2 is any one of a push switch, a toggle switch, a push switch, and a boat switch.
The power-on automatic starting circuit in the embodiment has the functions of the embodiment 1, and can protect the triode from being broken down by instantaneous high voltage through setting the resistor, so that the reliability and the stability of the circuit are improved; by arranging the light-emitting diode, when the power supply is electrified, the loop circuit of the light-emitting diode is conducted, and the light-emitting diode is lightened, so that a user can know whether the automatic starting circuit works normally or not at the first time when the power supply is electrified, and the convenience of the terminal equipment is improved; when the terminal equipment is maintained or the hardware is upgraded, the power supply needs to be started for debugging repeatedly, so that the terminal equipment is prevented from being damaged due to repeated continuous startup, the second switch can be disconnected, the second switch is closed after the maintenance or the upgrade is finished, the power-on automatic startup function of the terminal equipment is recovered, and the use by a user is further facilitated.
Example 3
Embodiment 3 provides a terminal device, including the power-on auto-on circuit of any one of embodiments 1 and 2.
The terminal equipment in the embodiment has the automatic starting function when the power supply is powered on, so that the situation that a user presses a physical starting key to start the terminal equipment is avoided, meanwhile, the problem of repeated starting is solved when the terminal equipment needs to be shut down, and the user experience is improved.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. The power-on automatic starting circuit is characterized by comprising a capacitor, a triode and a first switch;
one end of the capacitor is electrically connected with a power supply, the other end of the capacitor is electrically connected with a base electrode of the triode, an emitting electrode of the triode is grounded, a collector electrode of the triode is electrically connected with one end of the first switch and then is provided with a first node end, the other end of the first switch is grounded, and the first switch is in a normally open state;
the first node end is used for connecting an external terminal.
2. The power-on auto-on circuit of claim 1, wherein when the power supply is powered on, the transistor is turned on to switch the output signal at the first node from a predetermined high level to a low level.
3. The power-on auto-on circuit of claim 2, wherein the first node terminal is shorted to ground when the first switch is closed.
4. The power-on auto-on circuit of claim 1, further comprising a second switch electrically connected between the other end of the capacitor and the base of the transistor, the second switch being in a normally-off state;
when the second switch is turned off, the triode is cut off.
5. The power-on auto-on circuit of claim 1, further comprising a resistor electrically connected between the other end of the capacitor and the base of the transistor.
6. The power-on auto-on circuit of claim 1, further comprising a light emitting diode, an anode of the light emitting diode being electrically connected to the other end of the capacitor, a cathode of the light emitting diode being grounded.
7. The power-on auto-on circuit of claim 1, wherein the power supply comprises any one of a battery, an external power supply, and a GPIO high level pin of an MCU.
8. A terminal device, characterized in that it comprises a power-on auto-start-up circuit according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022529477.2U CN213152024U (en) | 2020-11-04 | 2020-11-04 | Power-on automatic starting circuit for terminal equipment and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022529477.2U CN213152024U (en) | 2020-11-04 | 2020-11-04 | Power-on automatic starting circuit for terminal equipment and terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213152024U true CN213152024U (en) | 2021-05-07 |
Family
ID=75722345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022529477.2U Active CN213152024U (en) | 2020-11-04 | 2020-11-04 | Power-on automatic starting circuit for terminal equipment and terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213152024U (en) |
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2020
- 2020-11-04 CN CN202022529477.2U patent/CN213152024U/en active Active
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