CN210899751U - LED lamp control circuit - Google Patents
LED lamp control circuit Download PDFInfo
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- CN210899751U CN210899751U CN201922042024.4U CN201922042024U CN210899751U CN 210899751 U CN210899751 U CN 210899751U CN 201922042024 U CN201922042024 U CN 201922042024U CN 210899751 U CN210899751 U CN 210899751U
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- led lamp
- driving module
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Abstract
The utility model discloses a LED lamp control circuit, including MCU, drive module U1, resistance, electric capacity and emitting diode, MCU output PWM signal is to drive module U1, and drive module drives different emitting diode according to the change of PWM signal. Through the utility model discloses a control circuit can realize the quick adjustment to the LED lamp to adapt to different environmental demands.
Description
Technical Field
The utility model relates to a circuit control technical field, in particular to LED lamp control circuit.
Background
With the progress of science and technology and the needs of society, devices are gradually developing towards the aspects of multiple functions, and the single function cannot meet the requirements of people. With the rapid development of automobile electronics, the styles displayed on automobile instruments are more and more, and the traditional monochromatic backlight is monotonous, so that people feel bored, and therefore, the color and brightness of the LED on the automobile instrument are urgently required to be changed.
Disclosure of Invention
The problem to the single color of LED lamp among the prior art on the motormeter, the utility model provides a LED lamp control circuit changes the color and the luminance of LED lamp through independently setting up the parameter.
In order to achieve the above object, the present invention provides the following technical solutions:
an LED lamp control circuit comprises an MCU, a drive module U1, a resistor, a capacitor and a light emitting diode, wherein an MCU _ LED _ SDI interface of the MCU is connected with an SDI interface of a drive module U1, an MCU _ LED _ SCK interface of the MCU is connected with an SCK interface of a drive module U1, an MCU _ LED _ LATCH interface of the MCU is connected with a LATCH interface of the drive module U1, and an MCU _ LED _ GCLK interface of the MCU is connected with a GCLK interface of the drive module U1;
a VCC port of the driving module U1 is connected with one end of a first capacitor C1, an IREF port of the driving module U1 is connected with one end of a first resistor R1, and the other end of the first capacitor C1 and the other end of the first resistor R1 are grounded after being connected in parallel;
a first PWM output end of the driving module U1 is connected to an anode of the first light emitting diode D1, a second PWM output end of the driving module U1 is connected to an anode of the second light emitting diode D2, a third PWM output end of the driving module U1 is connected to an anode of the third light emitting diode D3, and a cathode of the first light emitting diode D1, a cathode of the second light emitting diode D2, and a cathode of the third light emitting diode D3 are connected in parallel and then connected to a voltage of 5V.
Preferably, the driving module U1 is TLC6C 5724.
Preferably, the first resistor R1 is 2K Ω, the second resistor R2 is 4.7K Ω, and the first capacitor C1 is 0.1 μ F.
Preferably, the MCU is MB96F 693.
Preferably, the driving module U1 is provided with multiple groups of PWM output terminals, and is connected to the LED lamps in a one-to-one correspondence.
To sum up, owing to adopted above-mentioned technical scheme, compare with prior art, the utility model discloses following beneficial effect has at least:
through the utility model discloses a control circuit can adjust the color and the luminance of LED lamp on the motormeter voluntarily to adapt to different environmental demands, and components and parts are less, have reduced the loss, have greatly practiced thrift the cost, are convenient for extensive popularization and application.
Description of the drawings:
fig. 1 is a schematic diagram of an LED lamp control circuit according to an exemplary embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
As shown in fig. 1, the LED lamp control circuit includes an MCU, a driving module U1, a resistor, a capacitor, and a diode.
The MCU _ LED _ SDI interface of the MCU is connected with the SDI interface of the driving module U1 and used for transmitting control signals; an MCU _ LED _ SCK interface of the MCU is connected with an SCK interface of the driving module U1 and is used for transmitting a time signal; the MCU _ LED _ LATCH interface of the MCU is connected with the LATCH interface of the driving module U1 and used for storing information; the MCU _ LED _ GCLK interface of the MCU is connected with the GCLK interface of the driving module U1 and used for setting driving time. The specific model of MCU may employ MB96F 693.
The SENSE port of the driving module U1 is connected to a 5V power supply for adjusting the output voltage; a VCC port of the driving module U1 is connected with one end of a first capacitor C1, an IREF port (current setting end) of the driving module U1 is connected with one end of a first resistor R1, the other end of the first capacitor C1 and the other end of the first resistor R1 are grounded after being connected in parallel, and a GND port is grounded; the ERR port is connected with one end of a second resistor R2, and the other end of the second resistor R2 is connected with 5V voltage.
A first PWM output terminal (OUTG3) of the driving module U1 is connected to the anode of the first led D1, a second PWM output terminal (OUTR3) of the driving module U1 is connected to the anode of the second led D2, a third PWM output terminal (OUTB3) of the driving module U1 is connected to the anode of the third led D3, and the cathode of the first led D1, the cathode of the second led D2, and the cathode of the third led D3 are connected in parallel and then connected to a voltage of 5V.
In this embodiment, the driving module U1 may be in the form of TLC6C 5724. In order to adjust the LED lamp better, the resistance value of the first resistor R1 in the circuit is 2K omega, the resistance value of the second resistor R2 is 4.7K omega, and the capacitance value of the first capacitor C1 is 0.1 muF.
In this embodiment, the LED ambient lamp is a three-color lamp; and the driving module U1 is provided with a plurality of output ends which can be connected with a plurality of LED atmosphere lamps.
The utility model discloses a theory of operation: when a driver adjusts parameters (such as color, brightness and the like) of the LED lamp, corresponding current changes, the MCU sends a PWM signal to the driving module U1 according to the change of the current, and the driving module U1 drives the light-emitting diode according to RGB values in the PWM signal. Because the RGB values corresponding to different colors and brightness are different, the corresponding light emitting diodes can be driven and the brightness can be adjusted according to the RGB values in the PWM signals, so that the color and the brightness of the LED lamp can be adjusted. For example, in the embodiment, if the RGB value of the driving OUTR3 port is 110, the RGB value of the driving OUTG3 port is 125, and the RGB value of the driving OUTB3 port is 135, the LED lamp changes color according to the values of the three ports.
In this embodiment, one set of PWM output terminals (including three ports: OUTR, OUTG, OUTB) may be connected to one LED lamp, and multiple sets of PWM output terminals may be disposed on the driving module U1 for connecting different LED lamps.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.
Claims (5)
1. An LED lamp control circuit comprises an MCU, a drive module U1, a resistor, a capacitor and a light emitting diode, and is characterized in that an MCU _ LED _ SDI interface of the MCU is connected with an SDI interface of a drive module U1, an MCU _ LED _ SCK interface of the MCU is connected with an SCK interface of a drive module U1, an MCU _ LED _ LATCH interface of the MCU is connected with a LATCH interface of a drive module U1, and an MCU _ LED _ GCLK interface of the MCU is connected with a GCLK interface of a drive module U1;
a VCC port of the driving module U1 is connected with one end of a first capacitor C1, an IREF port of the driving module U1 is connected with one end of a first resistor R1, and the other end of the first capacitor C1 and the other end of the first resistor R1 are grounded after being connected in parallel;
a first PWM output end of the driving module U1 is connected to an anode of the first light emitting diode D1, a second PWM output end of the driving module U1 is connected to an anode of the second light emitting diode D2, a third PWM output end of the driving module U1 is connected to an anode of the third light emitting diode D3, and a cathode of the first light emitting diode D1, a cathode of the second light emitting diode D2, and a cathode of the third light emitting diode D3 are connected in parallel and then connected to a voltage of 5V.
2. An LED lamp control circuit according to claim 1, wherein said driving module U1 is TLC6C 5724.
3. An LED lamp control circuit according to claim 1, wherein the first resistor R1 is 2K Ω, the second resistor R2 is 4.7K Ω, and the first capacitor C1 is 0.1 μ F.
4. An LED lamp control circuit according to claim 1, wherein said MCU is MB96F 693.
5. The LED lamp control circuit according to claim 1, wherein the driving module U1 is provided with multiple sets of PWM output terminals and is electrically connected with the LED lamps in a one-to-one correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922042024.4U CN210899751U (en) | 2019-11-22 | 2019-11-22 | LED lamp control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922042024.4U CN210899751U (en) | 2019-11-22 | 2019-11-22 | LED lamp control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210899751U true CN210899751U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922042024.4U Active CN210899751U (en) | 2019-11-22 | 2019-11-22 | LED lamp control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210899751U (en) |
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2019
- 2019-11-22 CN CN201922042024.4U patent/CN210899751U/en active Active
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