In electronics, LEDs are fun to work with. We can make several projects using those LEDs. By definition, an LED (full light-emitting diode) is a semiconductor device that, when charged with an electric current, generates infrared or visible light. Many electrical types of equipment employ visible LEDs as indicator lamps, vehicles use them as rear-window and brake lights, and billboards and signage use them as alphanumeric displays or even full-color posters. But, do you know these LEDs can react to music or, sound? Interesting? So, let us make the Simple Sound Reactive LEDs Circuit.
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This simple Sound Reactive LEDs Circuit dance to the rhythm if hear sounds or music nearby. The circuit uses Zener diodes for reverse polarity protection. The Zener diode may avoid voltage spikes and safeguard LEDs because when the reverse breakdown voltage is reached, Zener begins to conduct current in the other direction. When the sound is provided near the circuit LEDs turn ON with different intensities, depending on the music. As, a result, it seems like a dancing LED which reacts to music.