Driving circuit of flashing LED lamp with adjustable brightness
A technology for LED lamps and driving circuits, which is applied in the layout of electric lamp circuits, electric light sources, lighting devices, etc., can solve the problems of short service life, high circuit cost, and chips are prone to failure, and achieves flexible use and adjustable flickering speed. Effect
Inactive Publication Date: 2014-02-12
吴汉肱
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Problems solved by technology
[0002] The driving circuit of the LED advertising light in the prior art has a complex composition. The LED display of various visual effects needs to be completed by a dedicated chip. The circuit cost is high, the height is fixed, and the chip is prone to failure and the service life is not long
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[0009]
[0010] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0011] refer to figure 1 The schematic diagram of the circuit of the present invention is shown.
[0012] In the embodiment of the present invention, the LED load is divided into the first group of LEDs and the second group of LEDs. The two groups of LEDs have the same composition structure, and are composed of several LEDs connected in parallel in the same direction. The anode is the voltage input, and the first triode Q1 The collector of the first triode Q1 is connected to the cathode of the first group of LEDs, the collector of the second triode Q1 is connected to the cathode of the second group of LEDs, and the bases of the first triode Q1 and the second triode Q2 pass through the capacitors C2 and C1 respectively. It is connected to the collectors ...
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The embodiment of the invention discloses a driving circuit of a flashing LED lamp with adjustable brightness. The driving circuit comprises a first LED set, a second LED set, a first triode, a second triode, a first capacitor, a second capacitor, a first adjustable resistor and a second adjustable resistor. The first LED set and the second LED set are formed by connecting a plurality of LEDs with the same number in parallel, the collector electrode of the first triode and the collector electrode of the second triode are connected with the negative end of the first LED set and the negative end of the second LED set respectively, the first capacitor and the second capacitor are connected with the base electrode of the second triode and the base electrode of the first triode respectively, the first adjustable resistor and the second adjustable resistor are respectively connected with the positive electrode of a power supply, and the positive end of the first LED set and the positive end of the second LED set are connected with the positive electrode of the power supply. Through the driving circuit, the simplest circuit is used, the flashing speed of the LEDs can be adjusted, the pattern colors of the LEDs can be arranged according to needs, and using is flexible.
Description
technical field [0001] The invention relates to an LED driving circuit, in particular to a flashing LED lamp driving circuit with adjustable brightness. Background technique [0002] The driving circuit of the LED advertising light in the prior art is complex in composition, and the LED display of various visual effects needs to be completed by a dedicated chip, the circuit cost is high, the height is fixed, and the chip is prone to failure and the service life is not long. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide a blinking LED lamp driving circuit with adjustable brightness. The display pattern and color of the LED can be set as required, and the flashing speed is adjustable. [0004] In order to solve the above technical problems, an embodiment of the present invention provides a blinking LED lamp driving circuit with adjustable brightness, including a first group of LEDs and a seco...
Claims
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Inventor 吴汉肱
Owner 吴汉肱