Inspiration
After learning about MOSFET in ECE270, I built a circuit that would take in PWM signals from a Raspberry Pi. The inspiration to use it for sound visualization came from seeing music concerts that would play lasers to the beat of the music. I figure that something like this could be used in a smaller party.
What it does
The LED strip flashes to the beat of the music that is playing through the Raspberry Pi. It takes in the amplitude of the signal and scales it to the PWM signal output on the GPIO.OUT pins.
How we built it
Using a Python library, we were able to access the PWM pin outs on the Raspberry Pi. We needed to create a separate circuit to deal with the PWM signals that were being sent to the LED strip.
Challenges we ran into
The sample rate of the program we were using was very high at times. Our big solution to this was to add blending so that the lights wouldn't look like they were strobing.
Accomplishments that we're proud of
That we built it in the short amount of time
What we learned
Python and ALSA audio
What's next for LED Strip Sound Visualizer
Set the LED strip on a permanent medium, something a bit nicer than a piece of cardboard
Built With
- audioop
- pigpio
- pyalsaaudio
- python
- raspberry-pi
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