CN214592069U - Power-on automatic indicating circuit - Google Patents
Power-on automatic indicating circuit Download PDFInfo
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- CN214592069U CN214592069U CN202120801399.9U CN202120801399U CN214592069U CN 214592069 U CN214592069 U CN 214592069U CN 202120801399 U CN202120801399 U CN 202120801399U CN 214592069 U CN214592069 U CN 214592069U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a go up electric automatic indicating circuit, including chip U1, resistance R1, resistance R2, switch SW1, power E, diode D1 and triode Q1, power E's positive pole is connected to switch SW 1's one end, the utility model discloses can use in various electronic product application fields with battery powered, including various consumer electronics, digital product etc.. The current consumed after the Q1 is conducted is very small, and meanwhile, the static power consumption of the whole power-on indicating circuit is very low (can be as low as less than 0.1mA in practical application), and the cost is also very low; the circuit can be applied to power-on indication in the electronic product circuit, and can automatically stop indication after the power-on is finished, the circuit is not controlled by a software program of a single chip microcomputer, and is completely realized by a hardware circuit, so that the service life of an LED indicating lamp can be prolonged, the stability of the indicating circuit is improved, and the circuit has the characteristic of low power consumption.
Description
Technical Field
The utility model relates to the field of switch technology, specifically a go up electric automatic indicating circuit.
Background
Among electronic products powered by lithium batteries, some electronic products have power supply LED indicator lamps when the electronic products are powered on and started up in order to enable users to have better use experience. The circuit of this patent of application can then light the LED pilot lamp when the electronic product is electrified to start, and then close the LED pilot lamp after waiting that the system completely operates.
To using among the electronic product of lithium cell power supply, some electronic products have the power supply LED pilot lamp in order to make the user have better use experience when the electronic product is electrified and is started, but the long-time LED pilot lamp that lights can reduce the life of pilot lamp, lead to the LED lamp to damage even, influence the user and use experience.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electricity automatic indicating circuit to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a power-on automatic indicating circuit comprises a chip U1, a resistor R1, a resistor R2, a switch SW1, a power supply E, a diode D1 and a triode Q1, wherein one end of the switch SW1 is connected with the positive electrode of the power supply E, the other end of the switch SW1 is connected with a resistor R1, a resistor R4, a resistor R5, a capacitor C4 and a pin 8 of the chip U1, the other end of the resistor R1 is connected with a resistor R2, a capacitor C1 and a resistor R3, the other end of the resistor R3 is connected with the base of a triode Q1, the collector of the triode Q1 is connected with the resistor R4 and a pin4 of the chip U1, the other end of the resistor R2 is connected with the other end of a capacitor C1, a grounding terminal and the emitter of the triode Q1, the other end of the resistor R5 is connected with a resistor R6 and a pin 7 of the chip U1, the other end of the resistor R6 is connected with a pin 2 of the capacitor C2, the other end of the pin 2 and the ground of the capacitor C2, the ground of the power supply E2 and the ground of the capacitor C2 and the ground of the power supply E2, the other end of the capacitor C3 is connected with a pin 5 of the chip U1, the other end of the capacitor C4 is grounded, a pin3 of the chip U1 is connected with an anode of the diode D1, and a cathode of the diode D1 is grounded through a resistor R7.
As a further technical solution of the present invention: the model of the chip U1 is NE 555.
As a further technical solution of the present invention: the diode D1 is a light emitting diode.
As a further technical solution of the present invention: the triode Q1 is an NPN type triode.
As a further technical solution of the present invention: the capacitor C1 is an electrolytic capacitor.
As a further technical solution of the present invention: the chip U1, the resistor R5, the resistor R6, the capacitor C2 and the capacitor C3 form a multi-resonant circuit.
As a further technical solution of the present invention: the diode D1 and the resistor R7 form an LED indicating circuit.
As a further technical solution of the present invention: the resistor R2 and the capacitor C1 form an RC delay circuit.
As a further technical solution of the present invention: the capacitor C2 is an electrolytic capacitor.
As a further technical solution of the present invention: the flicker frequency of the diode D1 can be adjusted by adjusting the values of the resistor R5, the resistor R6 and the capacitor C2.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses can use in various electronic product application fields with battery powered, including various consumer electronics, digital product etc.. The current consumed after the Q1 is conducted is very small, and meanwhile, the static power consumption of the whole power-on indicating circuit is very low (can be as low as less than 0.1mA in practical application), and the cost is also very low; the circuit can be applied to power-on indication in the electronic product circuit, and can automatically stop indication after the power-on is finished, the circuit is not controlled by a software program of a single chip microcomputer, and is completely realized by a hardware circuit, so that the service life of an LED indicating lamp can be prolonged, the stability of the indicating circuit is improved, and the circuit has the characteristic of low power consumption.
Drawings
Fig. 1 is the utility model discloses go up the electricity automatic indicating circuit schematic diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, embodiment 1: a power-on automatic indicating circuit comprises a chip U1, a resistor R1, a resistor R2, a switch SW1, a power supply E, a diode D1 and a triode Q1, wherein one end of the switch SW1 is connected with the positive electrode of the power supply E, the other end of the switch SW1 is connected with a resistor R1, a resistor R4, a resistor R5, a capacitor C4 and a pin 8 of the chip U1, the other end of the resistor R1 is connected with a resistor R2, a capacitor C1 and a resistor R3, the other end of the resistor R3 is connected with the base of a triode Q1, the collector of the triode Q1 is connected with the resistor R4 and a pin4 of the chip U1, the other end of the resistor R2 is connected with the other end of a capacitor C1, a grounding terminal and the emitter of the triode Q1, the other end of the resistor R5 is connected with a resistor R6 and a pin 7 of the chip U1, the other end of the resistor R6 is connected with a pin 2 of the capacitor C2, the other end of the pin 2 and the ground of the capacitor C2, the ground of the power supply E2 and the ground of the capacitor C2 and the ground of the power supply E2, the other end of the capacitor C3 is connected with a pin 5 of the chip U1, the other end of the capacitor C4 is grounded, a pin3 of the chip U1 is connected with an anode of the diode D1, and a cathode of the diode D1 is grounded through a resistor R7.
The chip U1, the resistor R5, the resistor R6, the capacitor C2 and the capacitor C3 form a multi-resonant circuit. Diode D1 and resistor R7 constitute an LED indicating circuit. The resistor R2 and the capacitor C1 form an RC delay circuit.
The working principle is as follows: SW1 is a power-on startup key in the circuit; c1 is an electrolytic capacitor, R2 and C1 form an RC delay circuit, and the delay time is τ 0.7(R2 × C1); the R1 and the R2 form a voltage division circuit at the same time, the voltage of the fully charged C1 can be set by configuring the resistance values of the R1 and the R2, and the voltage of the fully charged C1 is the base opening voltage of the triode Q1; meanwhile, the change of the base electrode potential of the Q1 triode is controlled by the change of the voltage during the charging and discharging of the C1; r3 is Q1 triode base limiting resistance; r4 is pull-up resistor on collector of transistor Q1; the U1, R5, R6, C2, C3 and C4 form an NE555 multivibrator circuit, and the oscillation period is T-0.7 (R5+2R6) C2; d1 and R7 form an LED indicating circuit; when the multivibrator circuit of the U1 works normally, a rectangular square wave is continuously output through the PIN PIN3 of the U1, and the LED indicator light D1 is controlled to flash.
When the SW1 is switched off, the whole system has no working voltage, and the LED indicator lamp D1 does not emit light for indication; when the SW1 is pressed and closed, the system voltage VCC is equal to the lithium battery voltage, at this time, because the voltage at the two ends of the capacitor cannot be suddenly changed, the base of the Q1 is still at a low level at this time, the Q1 is in a cut-off state, the collector of the Q1 and the PIN PIN4 of the U1 are pulled up to a VCC high level state through the R4 resistor, at this time, the multivibrator circuit formed by the U1 is in a normal working state, the PIN PIN3 of the U1 continuously outputs rectangular square waves, and the LED indicator light D1 starts to flicker; after 5 times of delay time of the R2 and C1 delay circuits, the C1 capacitor is charged to 99% of capacity, at the moment, the voltage of the anode of the C1 capacitor to ground is equal to the base starting voltage of Q1, the base of Q1 is set to be high level, Q1 is in a conducting state, a PIN PIN4 of U1 is pulled down to be low level by a triode Q1, at the moment, the U1 is in a continuous reset state, the multivibrator circuit stops working, the PIN PIN3 of U1 has no square wave output, and the LED indicator lamp D1 stops flickering; when SW1 is turned off again, the C1 capacitor discharges through the R2 resistor.
Example 2, based on example 1 above, the chip U1 was model NE 555. The diode D1 is a light emitting diode. The transistor Q1 is an NPN type transistor. The capacitor C1 is an electrolytic capacitor. The capacitor C2 is an electrolytic capacitor, wherein the resistor R5, the resistor R6, the capacitor C2, the resistor R2 and the capacitor C1 are all adjustable, and the flicker frequency of the led D1 can be adjusted by adjusting the values of the resistor R5, the resistor R6 and the capacitor C2; the flickering time of the light emitting diode D1 can be adjusted by adjusting the values of the resistor R2 and the capacitor C1.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. An automatic power-on indicating circuit comprises a chip U, a resistor R, a switch SW, a power supply E, a diode D and a triode Q, and is characterized in that one end of the switch SW is connected with the positive electrode of the power supply E, the other end of the switch SW is connected with the resistor R, a capacitor C and a pin 8 of the chip U, the other end of the resistor R is connected with the resistor R, the capacitor C and the resistor R, the other end of the resistor R is connected with the base electrode of the triode Q, the collector electrode of the triode Q is connected with the resistor R and a pin4 of the chip U, the other end of the resistor R is connected with the other end of the capacitor C, the grounding end and the emitter electrode of the triode Q, the other end of the resistor R is connected with the resistor R and a pin 7 of the chip U, the other end of the resistor R is connected with the capacitor C, a pin 2 of the chip U and a pin 6 of the chip U, the other end of the capacitor C is connected with the capacitor C, a pin 1 of the chip U, the negative electrode and the grounding end of the power supply E, the other end of the capacitor C3 is connected with a pin 5 of the chip U1, the other end of the capacitor C4 is grounded, a pin3 of the chip U1 is connected with an anode of the diode D1, and a cathode of the diode D1 is grounded through a resistor R7.
2. The power-on automatic indication circuit as claimed in claim 1, wherein the model of the chip U1 is NE 555.
3. The power-on automatic indication circuit as claimed in claim 1, wherein said diode D1 is a light emitting diode.
4. The power-on automatic indication circuit as claimed in claim 1, wherein the transistor Q1 is an NPN transistor.
5. The power-on automatic indication circuit of claim 1, wherein said capacitor C1 is an electrolytic capacitor.
6. The power-on automatic indication circuit of claim 1, wherein the chip U1, the resistor R5, the resistor R6, the capacitor C2 and the capacitor C3 form a multi-resonant circuit.
7. The power-on automatic indication circuit of claim 1, wherein the resistor R2 and the capacitor C1 form an RC delay circuit.
8. The power-on automatic indication circuit as claimed in claim 1, wherein the diode D1 and the resistor R7 form an LED indication circuit.
9. The power-on automatic indication circuit of claim 1, wherein said capacitor C2 is an electrolytic capacitor.
10. The power-on automatic indicating circuit of claim 6, wherein the values of the resistor R5, the resistor R6 and the capacitor C2 are adjusted to adjust the flashing frequency of the diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120801399.9U CN214592069U (en) | 2021-04-19 | 2021-04-19 | Power-on automatic indicating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120801399.9U CN214592069U (en) | 2021-04-19 | 2021-04-19 | Power-on automatic indicating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214592069U true CN214592069U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120801399.9U Active CN214592069U (en) | 2021-04-19 | 2021-04-19 | Power-on automatic indicating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214592069U (en) |
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2021
- 2021-04-19 CN CN202120801399.9U patent/CN214592069U/en active Active
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