CN210781436U - Knob light modulation working circuit and handheld lamp - Google Patents
Knob light modulation working circuit and handheld lamp Download PDFInfo
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- CN210781436U CN210781436U CN201920366655.9U CN201920366655U CN210781436U CN 210781436 U CN210781436 U CN 210781436U CN 201920366655 U CN201920366655 U CN 201920366655U CN 210781436 U CN210781436 U CN 210781436U
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Abstract
The utility model provides a knob light modulation work circuit and handheld lamp includes: the encoder control module is used for detecting the rotary displacement of the knob, converting the rotary displacement into a pulse signal and sending the pulse signal to the MCU control module; the MCU control module is used for converting the pulse signal sent by the coding controller module into a PWM (pulse-width modulation) adjusting signal and sending the PWM adjusting signal to the lamp body driving module; the lamp body driving module; be used for according to the PWM adjust signal that MUC control module sent adjusts the luminance in lamp source, based on the utility model discloses a knob lamp working circuit and handheld lamp become the pulse through the displacement conversion with the knob, become PWM adjust signal drive lamp body drive circuit with the pulse conversion again for realize steadily adjusting luminance behind the luminance ability of lamp body.
Description
Technical Field
The utility model relates to a lamp body drive field, in particular to knob light modulation work circuit and handheld lamp.
Background
As a new illumination tool, LED has become a leading product in a new generation of illumination market due to its characteristics of high efficiency, energy saving, long life, environmental protection, etc.
Most of the existing LED lighting control systems control the on-off state of the lamp by using various common manual switches, and the brightness adjustment of the LED lighting control systems is also correspondingly adjusted by using common dimming switches so as to achieve the most comfortable brightness required by individuals. Common remote control lamp is through remote controller button control on the market at present, and the luminance of lamp jumps step by step, can't realize steady dimming and most circuit complicacy, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a knob work circuit and handheld lamp of adjusting luminance changes the pulse into through the displacement with the knob, turns into PWM regulation signal drive lamp body drive circuit with the pulse again for realize steadily adjusting luminance behind the luminance ability of lamp body.
The utility model discloses a first embodiment provides a knob work circuit that adjusts luminance, include:
the encoder control module is used for detecting the rotary displacement of the knob, converting the rotary displacement into a pulse signal and sending the pulse signal to the MCU control module;
the MCU control module is used for converting the pulse signal sent by the coding controller module into a PWM (pulse-width modulation) adjusting signal and sending the PWM adjusting signal to the lamp body driving module;
the lamp body driving module; and the controller is used for adjusting the brightness of the lamp source according to the PWM adjusting signal sent by the MUC control module.
Preferably, the encoder control module includes: the circuit comprises a coding switch, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a third capacitor;
the first port of the coding switch is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the first capacitor, the second end of the first capacitor is used for grounding, the third port of the coding switch is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the second capacitor, the second end of the second capacitor is used for grounding, a sixth port of the coding switch is connected with a first end of the third resistor, a second end of the third resistor is connected with a first end of the third capacitor, the second end of the third capacitor is used for grounding, the second end of the first resistor is connected with the input end of the MUC control module, and the second end of the second resistor is connected with the input end of the MUC control module, and the second end of the third resistor is connected with the input end of the MUC control module.
Preferably, the MUC control module comprises: the MCU control chip, the control module filter circuit and the power supply circuit;
the output end of the power supply circuit is connected with the input end of the control module filter circuit, and the output end of the control module filter circuit is connected with the power interface of the MCU control chip.
Preferably, the power supply circuit includes: the first diode, the second diode and the fourth resistor; the first diode is connected with the anode of an external power supply, the anode of the second diode is connected with the anode of an internal battery, the cathodes of the first diode and the second diode are connected with the first end of the fourth resistor,
the control module filter circuit includes: the second end of the fourth resistor is connected with the first ends of the fourth capacitor and the fifth capacitor, the second end of the fourth resistor is connected with the VDD port of the MUC control chip, the second ends of the fourth capacitor and the fifth capacitor are grounded, and the VSS port of the MUC control chip is grounded.
Preferably, the lamp body driving module includes: the LED lamp comprises at least one lamp body driving circuit, an MOS tube switching circuit and an LED terminal;
the output end of the lamp body driving circuit is connected with the third end of the LED terminal, and the output end of the MOS tube switching circuit is connected with the first end of the LED terminal.
Preferably, the MOS transistor switching circuit includes: a fifth resistor, a sixth resistor and a field effect transistor;
the third end of the LED terminal is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the D pole of the field effect transistor, the S pole of the field effect transistor is used for being connected with a power supply, the G pole of the field effect transistor is connected with the output pin of the MUC chip, the first end of the sixth resistor is connected with the S pole of the field effect transistor, and the second end of the sixth resistor is connected with the G pole of the field effect transistor;
the lamp body driving circuit includes: the lamp body driving chip comprises a seventh resistor, an eighth resistor, a fourth capacitor and a lamp body driving chip;
the LED lamp comprises a lamp body driving chip, a first LED port, a second LED port, an output pin, a VCC port, a fourth capacitor, a PAD port and a GND port, wherein the first LED port and the second LED port on the lamp body driving chip are in short circuit and then are connected with a third end of the LED terminal, the second end of the LED terminal is grounded, an enable input port on the lamp body driving chip is connected with a first end of a seventh resistor, the second end of the seventh resistor is connected with the output pin of the MCU chip, the VCC port on the lamp body driving chip is used for being connected with a power supply, the VCC port on the lamp body driving chip is grounded through the fourth capacitor, the PAD port and the GND port.
Preferably, the chip model of the MUC control module is HT45SC216, and the model of the lamp body driving chip is CN 5711.
Preferably, the device further comprises a program loading module, a first end of the program loading module is used for being connected with a power supply, a second port of the program loading module is connected with an information sending port of the MCU control chip, a third port of the program loading module is connected with an information receiving port of the MCU control chip, and a fourth port of the program loading module is grounded.
Preferably, the charging control module further comprises: at least one charging control circuit and a charging filter circuit;
the charging filter circuit is connected with the charging control circuit.
Preferably, the charge control circuit includes: ninth resistance, tenth resistance, fifth electric capacity charge control chip, the VCC port of charge control chip is used for linking to each other with the adapter, the open-leakage output of charge control chip charge indicate the port with MCU control chip's input port links to each other, charge control chip's battery charge accomplish indicate the port with MCU control chip's input port links to each other, the first end of ninth resistance with charge control chip's messenger input port links to each other, the second end of ninth resistance charge control chip's VCC port links to each other, charge control chip's battery connect the port with the first end of fifth electric capacity links to each other, battery temperature detects the input with the second end of fifth electric capacity links to each other, the charging current sets up the end and passes through tenth resistance ground connection.
The charge filter circuit includes: the first ends of the sixth capacitor and the seventh capacitor are connected with the VCC end of the charging control chip, and the second ends of the sixth capacitor and the seventh capacitor are grounded.
The utility model discloses a second embodiment provides a hand-held lamp, a serial communication port, reach as above including lamp source, knob an arbitrary knob work circuit that adjusts luminance, the lamp source with LED terminal on the lamp body drive module links to each other, the knob with coding switch on the encoder control module links to each other.
The utility model discloses a second embodiment provides a hand-held lamp, reach as above including lamp source, knob an arbitrary knob work circuit that adjusts luminance, the lamp source with the last LED terminal of lamp body drive module links to each other, the knob with the last coding switch of encoder control module links to each other.
Based on the utility model discloses a knob light modulation work circuit and handheld lamp changes the pulse into through the displacement with the knob, turns into PWM regulation signal drive lamp body drive circuit with the pulse conversion again for realize steadily adjusting luminance behind the luminance ability of lamp body.
Drawings
Fig. 1 is a schematic structural diagram of a module for dimming a knob lamp according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an encoder control module according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an MCU control module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a lamp body driving module according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a charging control module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a lithium battery protection module according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of an electric quantity display module according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are 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. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1, a first embodiment of the present invention provides a knob dimming circuit, including:
the encoder control module 10 is used for detecting the rotary displacement of the knob, converting the rotary displacement into a pulse signal and sending the pulse signal to the MCU control module 20;
referring to fig. 2, the encoder control module 10 includes: the circuit comprises an encoding switch, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2 and a third capacitor C3;
the first port of the coding switch is connected with the first end of the first resistor R1, the second end of the first resistor R1 is connected with the first end of the first capacitor C1, the second end of the first capacitor C1 is used for grounding, the third port of the coding switch is connected with the first end of the second resistor R2, the second end of the second resistor R2 is connected with the first end of a second capacitor C2, the second end of the second capacitor C2 is used for grounding, the sixth port of the coding switch is connected with the first end of the third resistor R3, the second end of the third resistor R3 is connected with the first end of a third capacitor C3, the second end of the third capacitor C3 is used for grounding, the second end of the first resistor R1 is connected with the input pin of the MUC module, a second terminal of the second resistor R2 is connected to the input pin of the MUC module, and a second terminal of the third resistor R3 is connected to the input pin of the MUC control module 20.
The encoder control module 10 is a rotary sensor that converts the rotary displacement into a series of digital pulse signals, when the encoder rotates, a pulse signal is sent out every unit angle, when the MCU receives the pulse signal, the pulse signal is collected by internal coding, and the pulse signal is converted into a digital signal corresponding to each digital code. When the pulse signal is collected, the pulse is converted into a digital signal, then the lamp body is not directly driven, but after the pulse signal is received, when the lamp body is driven, a group of analog dimming is compiled again, namely the pulse signal is converted into a digital control signal, and then a group of corresponding PWM dimming is simulated, so that the phenomenon of discontinuous dimming can not occur in the dimming process.
The MCU control module 20 is configured to convert the pulse signal sent by the coding controller module 10 into a PWM adjustment signal, and send the PWM adjustment signal to the lamp body driving module, and the MUC control module 20 has a chip model number of HT45SC 216.
The MUC control module 20 includes: the MCU control chip, the control module filter circuit and the power supply circuit;
the output end of the power supply circuit is connected with the input end of the control module filter circuit, and the output end of the control module filter circuit is connected with the power interface of the MCU control chip.
Referring to fig. 3, preferably, the power supply circuit includes: a first diode D1, a second diode D2, and a fourth resistor R4; the first diode D1 is connected with the anode of the external power supply, the anode of the second diode D2 is connected with the anode of the internal battery, the cathodes of the first diode D1 and the second diode D2 are connected with the first end of the fourth resistor R4,
the control module filter circuit includes: a fourth capacitor C4 and a fifth capacitor C5, wherein a second terminal of the fourth resistor R4 is connected to first terminals of the fourth capacitor C4 and the fifth capacitor C5, a second terminal of the fourth resistor R4 is connected to the VDD port of the MUC controller chip, second terminals of the fourth capacitor C4 and the fifth capacitor C5 are grounded, and the VSS port of the MUC controller chip is grounded.
The MCU module judges the forward and reverse rotation of the knob by acquiring the electric signals of the second end of the first resistor R1 and the second end of the second resistor R2, so that forward dimming or reverse dimming of the lamp body is realized, if the electric signals are transmitted from the first resistor R1, the forward dimming is realized, and if the electric signals are transmitted from the second resistor R2, the reverse dimming is realized.
The lamp body driving module 30; and the lamp body driving chip is CN5711, and is used for adjusting the brightness of the lamp source according to the PWM adjusting signal sent by the MUC control module 20.
Referring to fig. 4, the lamp driving module includes: the LED lamp comprises at least one lamp body driving circuit, an MOS tube switching circuit and an LED terminal;
the output end of the lamp body driving circuit is connected with the third end of the LED terminal, and the output end of the MOS tube switching circuit is connected with the first end of the LED terminal.
Preferably, the MOS transistor switching circuit includes: a fifth resistor R5, a sixth resistor R6 and a field effect transistor Q1;
the third end of the LED terminal is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is connected to the D-pole of the fet Q1, the S-pole of the fet Q1 is used for connecting to a power supply, the G-pole of the fet Q1 is connected to the output pin of the MUC chip, the first end of the sixth resistor R6 is connected to the S-pole of the fet Q1, and the second end of the sixth resistor R6 is connected to the G-pole of the fet Q1;
the lamp body driving circuit includes: a seventh resistor R7, an eighth resistor R8, a fourth capacitor C4 and a lamp driving chip;
the LED lamp comprises a lamp body driving chip, and is characterized in that a first LED port and a second LED port on the lamp body driving chip are in short circuit and then connected with a third end of an LED terminal, a second end of the LED terminal is grounded, an enabling input port on the lamp body driving chip is connected with a first end of a seventh resistor R7, a second end of the seventh resistor R7 is connected with an output pin of an MCU chip, a VCC port on the lamp body driving chip is used for being connected with a power supply, the VCC port on the lamp body driving chip is grounded through a fourth capacitor C4, a PAD port and a GND port on the lamp body driving chip are grounded, and a current setting port on the lamp body driving chip is grounded through a seventh resistor R7.
When the output end of the MCU module 20 outputs an electrical signal and the electrical signal is transmitted to the enable port of the lamp driving chip through the seventh resistor R7, the enable high level of the lamp driving chip is effective, that is, the lamp driving chip starts to operate after obtaining the electrical signal, and the external power is transmitted to the lamp load through the first LED port and the second LED port of the lamp driving chip to drive the lamp load to operate.
In this embodiment, the number of the lamp body driving circuits may be one or more, wherein different numbers of the lamp body driving circuits may be adopted for different loads. For example, when the lamp load on the LED terminal is 5 watts, one CN5711 lamp driving chip is used, when the lamp load on the LED terminal is 10 watts, two CN5711 lamp driving chips are used, and when the lamp load on the LED terminal is 15 watts, three CN5711 lamp driving chips are used. The corresponding relation of concrete load and lamp body drive circuit can decide according to the practical lamp body driver chip's of reality model and other mode of connection, and these schemes are all in the utility model discloses an within the protection scope.
When the MCU control module 20 outputs an electrical signal to the fet so that VGS is greater than the threshold voltage, the fet Q1 is turned on to drive the corresponding lamp load on the LED terminal.
Preferably, the field effect transistor is a P-channel field effect transistor.
The reason for channel formation is that when VGS is 0V, two diodes are placed back-to-back between the drain and source, and a voltage is applied between the drain D and source S, so that no current is formed between the drain D and source S.
When voltage is applied to the gate G, if VGS < VGS (t) (VGS (t)) is called as turn-on voltage, holes in the P-type semiconductor close to the lower part of the gate G are pushed downwards by the capacitance between the gate G and the substrate, and a thin depletion layer of negative ions is presented. Minority carriers in the depletion layer will move to the surface layer, but the minority carriers are limited in number and lack to form the channel, so the minority carriers still lack to form the drain D current Id.
When VGS is larger than VGS (t), the voltage of the gate G is higher than VGS (t), so that more electrons are collected in the P-type semiconductor layer under the gate G to form a channel to connect the drain D and the source S. If the drain-source voltage is applied at this time, the drain D current Id can be constituted. Electrons in the conduction channel formed under the gate G are called inversion layers (inversion layers) because they have a polarity opposite to that of the carrier holes of the P-type semiconductor. Id will increase from time to time as VGS continues to increase.
Preferably, the device further comprises a program loading module, a first end of the program loading module is used for being connected with a power supply, a second port of the program loading module is connected with an information sending port of the MCU control chip, a third port of the program loading module is connected with an information receiving port of the MCU control chip, and a fourth port of the program loading module is grounded.
And the program loading port is sent to the program receiving end of the MUC module through the program sending end, and the receiving end is used for receiving a feedback signal of the program sending end of the MCU module.
Referring to fig. 5, the charging control module further includes: at least one charging control circuit and a charging filter circuit;
the charging filter circuit is connected with the charging control circuit.
Preferably, the charge control circuit includes: ninth resistance R9, tenth resistance R10, fifth electric capacity C5 charge control chip, the VCC port of charge control chip is used for linking to each other with the adapter, the open-drain output of charge control chip charge indicate the port with MCU control chip's input port links to each other, charge control chip's battery charge accomplish indicate the port with MCU control chip's input port links to each other, ninth resistance R9's first end with charge control chip's messenger input port links to each other, ninth resistance R9's second end the VCC port of charge control chip links to each other, charge control chip's battery connect the port with fifth electric capacity C5's first end links to each other, battery temperature detects the input with fifth electric capacity C5's second end links to each other, the charging current sets up the end and passes through tenth resistance R10 ground connection.
The charge filter circuit includes: a sixth capacitor C6 and a seventh capacitor C7, wherein first ends of the sixth capacitor C6 and the seventh capacitor C7 are connected to the VCC terminal of the charging control chip, and second ends of the sixth capacitor C6 and the seventh capacitor C7 are grounded.
The chip model of the charging management chip is AP5056, when an electrical signal is given to the enable terminal from the outside, the charging management chip starts to work, the chip charges the battery pack, when charging, the open-drain output charging indication port outputs a low level, when the battery pack is fully charged, the open-drain output charging indication port outputs a high level, the battery charging completion indication port outputs a low level, please refer to 6, the charging control module is connected with a lithium battery protection module, when a short circuit occurs to a battery pin, a ground level loop is cut off to protect the lithium battery, please refer to 7, fig. 7 is an electric quantity display module, and is connected with the MCU control module 20 for displaying the electric quantity of the lithium battery.
In this embodiment, the number of the charge control circuits may be one or more, wherein different numbers of charge control circuits may be adopted for different loads. Concrete load and charge control circuit's corresponding relation can be decided according to the practical lamp body driver chip's of reality model and other mode of connection, and these schemes are all in the utility model discloses an within the protection scope.
When the lamp body load on the LED terminal is larger, the capacity of the required lithium battery is correspondingly increased, and when the capacity of the lithium battery is larger, the adopted lithium battery chip is correspondingly increased to increase the charging current.
The utility model discloses a second embodiment provides a hand-held lamp, reach as above including lamp source, knob an arbitrary knob work circuit that adjusts luminance, the lamp source with the last LED terminal of lamp body drive module links to each other, the knob with the last coding switch of encoder control module links to each other.
Based on the utility model discloses a knob light modulation work circuit and handheld lamp changes the pulse into through the displacement with the knob, turns into PWM regulation signal drive lamp body drive circuit with the pulse conversion again for realize steadily adjusting luminance behind the luminance ability of lamp body.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.
Claims (10)
1. A rotary knob dimming operation circuit, comprising:
the encoder control module is used for detecting the rotary displacement of the knob, converting the rotary displacement into a pulse signal and sending the pulse signal to the MCU control module;
the MCU control module is used for converting the pulse signal sent by the encoder control module into a PWM (pulse-width modulation) adjusting signal and sending the PWM adjusting signal to the lamp body driving module;
the lamp body driving module; and the MCU control module is used for adjusting the brightness of the lamp source according to the PWM adjusting signal sent by the MCU control module.
2. The knob dimming circuit of claim 1, wherein the encoder control module comprises: the circuit comprises a coding switch, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a third capacitor;
the first port of the coding switch is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the first capacitor, the second end of the first capacitor is used for grounding, the third port of the coding switch is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the second capacitor, the second end of the second capacitor is used for grounding, a sixth port of the coding switch is connected with a first end of the third resistor, a second end of the third resistor is connected with a first end of the third capacitor, the second end of the third capacitor is used for grounding, the second end of the first resistor is connected with the input end of the MCU control module, and the second end of the second resistor is connected with the input end of the MCU control module, and the second end of the third resistor is connected with the input end of the MCU control module.
3. The knob dimming operation circuit according to claim 2, wherein the MCU control module comprises: the device comprises an MCU control chip, a control module filter circuit and a power supply circuit, wherein the chip type of the MCU control module is HT45SC 216;
the output end of the power supply circuit is connected with the input end of the control module filter circuit, and the output end of the control module filter circuit is connected with the power interface of the MCU control chip.
4. The knob dimming operation circuit according to claim 3, wherein the power supply circuit comprises: the first diode, the second diode and the fourth resistor; the first diode is connected with the anode of an external power supply, the anode of the second diode is connected with the anode of an internal battery, the cathodes of the first diode and the second diode are connected with the first end of the fourth resistor,
the control module filter circuit includes: the second end of the fourth resistor is connected with the first ends of the fourth capacitor and the fifth capacitor, the second end of the fourth resistor is connected with the VDD port of the MCU control chip, the second ends of the fourth capacitor and the fifth capacitor are grounded, and the VSS port of the MCU control chip is grounded.
5. The rotary knob dimming operation circuit according to claim 3, wherein the lamp body driving module comprises: the LED lamp comprises at least one lamp body driving circuit, an MOS tube switching circuit and an LED terminal;
the output end of the lamp body driving circuit is connected with the third end of the LED terminal, and the output end of the MOS tube switching circuit is connected with the first end of the LED terminal.
6. The knob dimming operation circuit according to claim 5, wherein the MOS transistor switch circuit comprises: a fifth resistor, a sixth resistor and a field effect transistor;
the third end of the LED terminal is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the D pole of the field-effect tube, the S pole of the field-effect tube is used for being connected with a power supply, the G pole of the field-effect tube is connected with the output pin of the MCU control chip, the first end of the sixth resistor is connected with the S pole of the field-effect tube, and the second end of the sixth resistor is connected with the G pole of the field-effect tube;
the lamp body driving circuit includes: the lamp comprises a seventh resistor, an eighth resistor, a fourth capacitor and a lamp body driving chip, wherein the model of the lamp body driving chip is CN 5711;
the LED lamp comprises a lamp body driving chip, a first LED port, a second LED port, an output pin, a VCC port, a fourth capacitor, a PAD port and a GND port, wherein the first LED port and the second LED port on the lamp body driving chip are in short circuit and then are connected with a third end of the LED terminal, the second end of the LED terminal is grounded, an enable input port on the lamp body driving chip is connected with a first end of a seventh resistor, the second end of the seventh resistor is connected with the output pin of the MCU chip, the VCC port on the lamp body driving chip is used for being connected with a power supply, the VCC port on the lamp body driving chip is grounded through the fourth capacitor, the PAD port and the GND port.
7. The knob dimming operation circuit according to claim 4, further comprising a program loading module, wherein a first end of the program loading module is used for being connected to a power supply, a second port of the program loading module is connected to the information transmitting port of the MCU control chip, a third port of the program loading module is connected to the information receiving port of the MCU control chip, and a fourth port of the program loading module is grounded.
8. The rotary knob dimming operating circuit according to claim 1, further comprising a charging control module, the charging control module comprising: at least one charging control circuit and a charging filter circuit;
the charging filter circuit is connected with the charging control circuit.
9. The knob dimming operation circuit according to claim 8, wherein the charge control circuit comprises: the charging control circuit comprises a ninth resistor, a tenth resistor and a fifth capacitor charging control chip, wherein a VCC port of the charging control chip is used for being connected with an adapter, an open-drain output charging indication port of the charging control chip is connected with an input port of the MCU control chip, a battery charging completion indication port of the charging control chip is connected with the input port of the MCU control chip, a first end of the ninth resistor is connected with an enable input port of the charging control chip, a second end of the ninth resistor is connected with the VCC port of the charging control chip, a battery connection port of the charging control chip is connected with a first end of the fifth capacitor, a battery temperature detection input end is connected with a second end of the fifth capacitor, and a charging current setting end is grounded through the tenth resistor;
the charge filter circuit includes: the first ends of the sixth capacitor and the seventh capacitor are connected with the VCC end of the charging control chip, and the second ends of the sixth capacitor and the seventh capacitor are grounded.
10. A hand held lamp comprising a lamp source, a knob and the knob dimming operation circuit of any one of claims 1 to 9, wherein the lamp source is connected to the LED terminals of the lamp body driving module, and the knob is connected to the encoder switch of the encoder control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920366655.9U CN210781436U (en) | 2019-03-21 | 2019-03-21 | Knob light modulation working circuit and handheld lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920366655.9U CN210781436U (en) | 2019-03-21 | 2019-03-21 | Knob light modulation working circuit and handheld lamp |
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| Publication Number | Publication Date |
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| CN210781436U true CN210781436U (en) | 2020-06-16 |
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| CN201920366655.9U Active CN210781436U (en) | 2019-03-21 | 2019-03-21 | Knob light modulation working circuit and handheld lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951921A (en) * | 2019-03-21 | 2019-06-28 | 厦门东昂光电科技有限公司 | A kind of knob lamp operating circuit and hand-held lamp |
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2019
- 2019-03-21 CN CN201920366655.9U patent/CN210781436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951921A (en) * | 2019-03-21 | 2019-06-28 | 厦门东昂光电科技有限公司 | A kind of knob lamp operating circuit and hand-held lamp |
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