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Creating an Audio-Reactive LED Circuit : 10 Steps ...
https://www.instructables.com/Creating-An-Audio-Reactive-LED-Circuit/
1) Insert the negative end of the LED into the negative rail, and the positive end into an adjacent hole. 2) Insert the 330 ohm resistor in series with the LED, …
Modulating Audio on a LED : 3 Steps (with Pictures ...
https://www.instructables.com/Modulating-Audio-on-a-LED/
The input audio is amplified and then modulated using a LED by changing the current that lights the LED based on the audio wave. The receiver translates the …
Audio Controlled LED Circuit using Transistors - DIY
https://circuits-diy.com/audio-controlled-led-circuit-using-transistors-diy/
This circuit is based on BD140 transistor, it’s very simple and basic and needs only a few components. LEDs turn on and off according to the pitch …
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