Sound control LED circuit

Abstract

The invention discloses a sound control LED circuit. The sound control LED circuit comprises a transformer, a first voltage regulation circuit, a second voltage regulation circuit, an LED branch circuit, a micro controller, and an LED controller, wherein the transformer comprises a main winding, a primary winding and a secondary winding; the main winding and a first switch are connected between the output end and the grounding end of a rectifying circuit in series; the first voltage regulation circuit is connected between the two ends of the primary winding and used for obtaining a first direct current voltage; the second regulation circuit is connected between the two ends of the secondary winding and used for obtaining a second direct current voltage; the LED branch circuit comprises LEDs, a second switch and a detection resistor that are connected in series in sequence between the first direct current voltage and the grounding end, and one end of the detection resistor provides a feedback voltage; the micro controller outputs a lamplight control signal based on an audio signal collected by a microphone; and the LED controller receives the lamplight control signal and the feedback voltage, and outputs control signals to the first switch and the second switch. Relatively high power supply efficiency of the sound control LED circuit can be realized by adjusting the turns ratio of coils between the primary winding and the secondary winding of the transformer.

Description

【Technical field】 [0001] The invention relates to the field of circuit design, in particular to a sound-activated LED (Light Emitting Diode) circuit. 【Background technique】 [0002] According to market research, voice-activated LEDs are very popular and can replace ordinary household light bulbs. Common household light bulbs rely on mechanical switches to turn the lights on and off. The voice-activated LED is more convenient. For example, there is no need to fumble for a mechanical switch in the dark, and it can be controlled directly through a specific voice. In addition, voice-activated LEDs can also achieve the effect of changing colors and adjusting brightness, which cannot be achieved by these traditional household ordinary light bulbs. On the one hand, it is necessary to realize the functions of conveniently controlling LEDs (such as shutdown, startup, brightness adjustment, intermittent flashing, etc.), and on the other hand, it is hoped that the power supply effici...

AI Technical Summary

Problems solved by technology

In addition, voice-activated LEDs can also achieve the effect of changing colors and adjusting brightness, which cannot be achieved by these traditional household light bulbs.

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