PyroElectro.com

[ThePyroElectro]

The Music Equalizer Display Tutorial Write-up

[rverdeil]

i want to take the same concept and use a row of about 50 led lights as the visualizer. how and where do i start?

[ThePyroElectro]

Hey Rverdeil,

The only real difference between lighting up 10 lights & 50 lights will be with the A/D's. The ADC is 10-bit so the highest value it can be is 1023.

So instead of divided 1023/10 and having 10 increments of 102.3 for the full scale of the ADC, you'd divide 1023/50 and each led would represent an increase of 20.46 in the ADC value.

Hopefully that makes sense. Just let me know if it doesn't.

[elrunethe2nd]

This is going to seem like a bit of a necropost, but oh well.
I have a few questions from an electrical engineering newbie.

First, could this setup be powered from the same power that heads to the headphones? Is that a realistic idea? Even fullsize headphones?

My thought was about mounting a row of these to the sides of a pair of full size headphones so that you had an equalizer on the exterior. (In the image of a traditional equalizer similar to that on those shirts floating around). I'm sure that if required, fitting batteries wouldn't be too big a deal (you could maybe hide it in some of the soft lining near the edge?), but it would be easier without.

I realize this is pure eyecandy and probably a bit of a power hog, yet I am still intrigued by the idea.

Thanks in advance; any thoughts appreciated.

(I did this here as there are VERY few articles which discuss this, and yours does it the best!)

[ThePyroElectro]

Hey,

The power coming out of any CD or MP3 player is not enough to really power multiple LEDs. An external power source would be necessary, these small button batteries could do the trick.

But your idea is definitely feasible. You will have to modify the headphones and use a smaller PIC so that the package isn't too big.

[elrunethe2nd]