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LEDs dancing to music

Circuit diagram

Image of the circuit built up


This circuit makes an LED 'dance' to music by setting a frequency at wich the LED turns off. Due to constantly chaning frequencies in music, LED lights up when there is a low frequency, and turn off when there is no low frequency. This appears as if the LED is dancing to the beat of the music.

You can fine tune the frequency when the LED drops out by adjusting the 10K potentiometer.

Brief Explanation:

The circuit uses a low pass filter to set the frequency at which the LED lights up by filtering the higher frequencies to ground through the 10nF capacitor 'C2'.

This circuit was designed by "Jim" and tested at Mallinson Electrical; we can verify that it works.


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