CN204810598U - Strong and weak light controlling circuit of tactics lamp - Google Patents
Strong and weak light controlling circuit of tactics lamp Download PDFInfo
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- CN204810598U CN204810598U CN201520325910.7U CN201520325910U CN204810598U CN 204810598 U CN204810598 U CN 204810598U CN 201520325910 U CN201520325910 U CN 201520325910U CN 204810598 U CN204810598 U CN 204810598U
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Abstract
The utility model discloses a strong and weak light controlling circuit of tactics lamp, including power, switch, NULL, triode, emitting diode, inductance, detection resistance, the positive output end of power is connected with the collecting electrode of inductance, emitting diode and triode behind the switch in proper order, and the positive output end of power still is connected with NULL behind the switch, and projecting pole ground connection after detecting resistance of the base of triode, triode is connected to NULL's output, detect voltage feedback to the NULL of resistance, NULL is according to the voltage regulation PWM duty cycle that detects resistance. The utility model discloses use electronic component is few, with low costs, the heat production is few, whole circuit is simple, easy production to the reliability is high, and it is high to detect the precision.
Description
[technical field]
The utility model relates to electronic circuit field, relates to a kind of strong and weak light control circuit of Tactical lights specifically.
[background technology]
The strong and weak photocontrol of LED of general Tactical lights, the Enable Pin of Single-chip Controlling constant current chip, adopts the different duty ratio of output to drive constant-current source, reaches different electric current, realize strong and weak photocontrol.The shortcoming of prior art uses single-chip microcomputer and LED constant current chip to carry out control to drive, and not only increase the complexity of whole circuit, also add overall use cost, in addition, the reliability of detection is poor, can not meet the requirement of user.
Above-mentioned defect, is worth solving.
[summary of the invention]
In order to overcome the deficiency of existing technology, the utility model provides a kind of strong and weak light control circuit of Tactical lights.
Technical solutions of the utility model are as described below:
The strong and weak light control circuit of Tactical lights, comprise power supply, switch, integrated chip, triode, light-emitting diode, inductance and detect resistance, it is characterized in that, the cathode output end of described power supply is connected with the collector electrode of described inductance, described light-emitting diode and described triode successively after described switch, the cathode output end of described power supply is also connected with described integrated chip after described switch, the output of described integrated chip connects the base stage of described triode, emitter ground connection after described detection resistance of described triode;
The Voltage Feedback of described detection resistance is after described integrated chip, and described integrated chip adjusts PWM duty ratio.
Further, be provided with reference voltage in described integrated chip, described integrated chip is by PWM duty ratio described in the Voltage Cortrol of more described reference voltage and described detection resistance.
Further, described triode is NPN type triode.
According to the utility model of said structure, its beneficial effect is, the utility model detects the electric current of light-emitting diode by detecting ohmically voltage, and the fiducial value in single-chip microcomputer inside compares, adjusted the electric current of light-emitting diode by adjustment PWM duty ratio, and then realize constant current.The utility model uses electronic component few, and cost is low, heat production is few; Integrated circuit is simple, and easily produce, and reliability is high, accuracy of detection is high.
[accompanying drawing explanation]
Fig. 1 is the circuit theory diagrams of the utility model embodiment.
In the drawings, S1, switch; IC2, integrated chip; Q1, triode; L1, inductance; LED, light-emitting diode; R1, detection resistance.
[embodiment]
Below in conjunction with accompanying drawing and execution mode, the utility model is conducted further description:
As shown in Figure 1, the utility model provides a kind of strong and weak light control circuit of Tactical lights, comprise power supply, switch, integrated chip, triode, light-emitting diode, inductance and detect resistance, the cathode output end of power supply is connected with the collector electrode of described inductance, light-emitting diode and triode successively after switch, the cathode output end of power supply is also connected with integrated chip after switch, the base stage of the output connecting triode of integrated chip, the emitter of triode is ground connection after resistance after testing; Detect the Voltage Feedback of resistance after integrated chip, integrated chip adjustment PWM duty ratio.
Preferably, be provided with reference voltage in integrated chip, integrated chip is by benchmark voltage and the Voltage Cortrol PWM duty ratio detecting resistance.
Preferably, triode is NPN type triode.
The concrete operation principle of the present embodiment is:
Switch S 1 is connected, and circuit ON, powers on, and the 2nd pin of integrated chip IC2 is according to setting output pwm signal, and then triode Q1 conducting, and inductance L 1 is charged, and powers to LED simultaneously.The electric current of LED is detected by the voltage detected on resistance R1, detected by AD input, and compare with the fiducial value arranged in single-chip microcomputer, if the electric current of LED is excessive or too small, by adjusting the duty ratio of PWM, thus the electric current controlling LED diminishes or becomes large, realizes constant current.As from the foregoing, by adjusting the duty ratio of PWM, realize strong and weak light, the brightness of adjustment LED.
The utility model uses electronic component few, and cost is low, heat production is few; Integrated circuit is simple, and easily produce, and reliability is high, accuracy of detection is high.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to the utility model claims.
By reference to the accompanying drawings exemplary description is carried out to the utility model patent above; the realization of obvious the utility model patent is not subject to the restrictions described above; as long as have employed the various improvement that method is conceived and technical scheme is carried out of the utility model patent; or the design of the utility model patent and technical scheme directly applied to other occasion, all in protection range of the present utility model without to improve.
Claims (3)
1. the strong and weak light control circuit of Tactical lights, comprise power supply, switch, integrated chip, triode, light-emitting diode, inductance and detect resistance, it is characterized in that, the cathode output end of described power supply is connected with the collector electrode of described inductance, described light-emitting diode and described triode successively after described switch, the cathode output end of described power supply is also connected with described integrated chip after described switch, the output of described integrated chip connects the base stage of described triode, emitter ground connection after described detection resistance of described triode;
The Voltage Feedback of described detection resistance is after described integrated chip, and described integrated chip adjusts PWM duty ratio.
2. the strong and weak light control circuit of Tactical lights according to claim 1, is characterized in that, is provided with reference voltage in described integrated chip, and described integrated chip is by PWM duty ratio described in the Voltage Cortrol of more described reference voltage and described detection resistance.
3. the strong and weak light control circuit of Tactical lights according to claim 1, is characterized in that, described triode is NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520325910.7U CN204810598U (en) | 2015-05-20 | 2015-05-20 | Strong and weak light controlling circuit of tactics lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520325910.7U CN204810598U (en) | 2015-05-20 | 2015-05-20 | Strong and weak light controlling circuit of tactics lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204810598U true CN204810598U (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520325910.7U Active CN204810598U (en) | 2015-05-20 | 2015-05-20 | Strong and weak light controlling circuit of tactics lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204810598U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108495424A (en) * | 2018-05-25 | 2018-09-04 | 深圳市东昕科技有限公司 | A kind of New LED control circuit and its control method |
-
2015
- 2015-05-20 CN CN201520325910.7U patent/CN204810598U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108495424A (en) * | 2018-05-25 | 2018-09-04 | 深圳市东昕科技有限公司 | A kind of New LED control circuit and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Jian Inventor after: Chen Zhong Inventor after: Ren Huawei Inventor before: Xu Jian Inventor before: Chen Zhong Inventor before: Ren Huawei |
|
| COR | Change of bibliographic data |