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Sound Controlled LED RGB Strip - HELP

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Dec 26, 2007
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Guys, I need a bit of help.

I'm redesigning my room (I'm only at the process of designing the glass furniture, PC setup, Speaker (Home Theatre) setup and other things) and I've decided to add an RGB setup.

It's going to be an LED RGB light strip (this one so far: DealExtreme: $64.42 RGB Multicolored 5-Meter 150-LED 30W Light Strip (DC 12V)) following a "U" shaped path around my ceiling (thus covering 3/4 of the room). Naturally it's going to be glued to it and will be somehow covered with sanded glass or acrylic to diffuse the light.

Now, I need help with the controller. Why? Because I want it to be sound controlled. I've discussed the option of wiring it to the speaker source but hard wiring it will definitely be a problem with a 5.1 setup. Subsequently I need it to receive audio via a microphone.

I know for a fact that these strips have 3 wires plus a common wire. In consequence they can be controlled separately (to mix RGB, etc.).

I really need your help here, this is a project that will take a lot of my time (and money) and will probably end up doing it in a year or so because I need to raise the money for all of it (don't let this put you down, I AM going to do this, I just need to figure all the design out before I start actually doing it).

I did find a controller from alibaba, but they didn't show me the price, and other sites have controllers for like 150 euros and that is really not within my budget (for a driver). I can build it myself, I have soldering skills, etc. I just do not know how to build the circuit (I forgot how to design op.amp. circuits, etc.). I also found this: Colour (Sound) Organ, but it doesn't specify anything about usage, what it's capable of, etc.

Thanks in advance, any help will be appreciated :)


EDIT: Forgot to add, the device should be able to be plugged in a 220v AC plug.
 
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Years ago... there was a circuit called a Color Organ...
You would place small Xmas lights randomly in a large
speaker sized enclosure with a lens from an overhead
florescent light fixture..
The circuit had 3 different filtered outputs and would be
triggered by different frequencies and amplitude of sound.

Just did a quick Google search and came up with this...
(there are more)...:cool:

Color Organ Electronic Circuits


Jerry
 
Joined
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Messages
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Years ago... there was a circuit called a Color Organ...
You would place small Xmas lights randomly in a large
speaker sized enclosure with a lens from an overhead
florescent light fixture..
The circuit had 3 different filtered outputs and would be
triggered by different frequencies and amplitude of sound.

Just did a quick Google search and came up with this...
(there are more)...:cool:

Color Organ Electronic Circuits


Jerry


Thanks for the help, Jerry, but that's exactly the same google search I did (MarioMaster told me about the color organ) and I came up with the link I provided in the OP (Colour (Sound) Organ). Nevertheless I'm going to have a look at those google results one more time, though I feel I'll have to build my own circuit. I'd prefer selecting the colour mix via 3 potentiometers as well.
 
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Thanks for the help, Jerry, but that's exactly the same google search I did (MarioMaster told me about the color organ) and I came up with the link I provided in the OP (Colour (Sound) Organ). Nevertheless I'm going to have a look at those google results one more time, though I feel I'll have to build my own circuit. I'd prefer selecting the colour mix via 3 potentiometers as well.

Sorry... I was hard to see the link hidden in a sentence...
That's why I put links on a separate line...:beer:

Actually I had a look at the circuit you linked to and it controls the 3 output
as I described above... it uses simple frequency filters on the Gates of the SCRs...
and and they are triggered by an electret microphone...

For circuits that use low wattage of 120VAC...
you can get a 220VAC to 110VAC step down transformer...


Jerry
 
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Sorry... I was hard to see the link hidden in a sentence...
That's why I put links on a separate line...:beer:

Actually I had a look at the circuit you linked to and it controls the 3 output
as I described above... it uses simple frequency filters on the Gates of the SCRs...
and and they are triggered by an electret microphone...

Jerry

I'll change the links' colours :)

Yeah, but how do I change the output of those AC sockets to 12v DC for the RGB LED strip? The creator didn't say if the sensitivity levels are just for volume sensitivity or frequency.
 
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The circuit you linked to uses very simplified frequency filtering...maybe
not what you really want...

I'll see what I can find and post back here later...:cool:

Jerry
 
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If you want any advanced degree of control, you'll probably want a PIC or AVR based microcontroller, taking the signal from the microphone, coming up with an useful output, then controlling the brightness of the LEDs through PWM output. A standard wall-wart capable of high enough current should be suitable, provided you regulate it. I know this can be done, as long as you have a working knowledge of the microcontroller. Searching for link now...
 
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If you want any advanced degree of control, you'll probably want a PIC or AVR based microcontroller, taking the signal from the microphone, coming up with an useful output, then controlling the brightness of the LEDs through PWM output. A standard wall-wart capable of high enough current should be suitable, provided you regulate it. I know this can be done, as long as you have a working knowledge of the microcontroller. Searching for link now...

Oh my god, please, no PIC. Had enough of it in high school and I never excelled at that, AND I don't have the tools to work with it.

What I want is the following:

  • 30W RGB LED Light Strip:
  • Controlling each colour separately via potentiometers​
  • Having it react to music frequencies​
  • Has to take sound input via microphone​
  • Analog circuitry, no programming​

Remember that it has to be plugged to 220v AC.
 
Last edited:
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Hey Niko....

I think I found a circuit for your needs...
It can be run with a 6VDC wall adapter as is...and it uses High... Med
and Low Frequency filters... It does not use 120VAC or 220VAC directly.
The output would be changed to make it a single output per frequency..
It would not be difficult to make the circuit run on 12VDC like your LED
strings..

The Electronic Peasant's LED Color Organ Page


Jerry
 
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Hey Niko....

I think I found a circuit for your needs...
It can be run with a 6VDC wall adapter as is...and it uses High... Med
and Low Frequency filters... It does not use 120VAC or 220VAC directly.
The output would be changed to make it a single output per frequency..

The Electronic Peasant's LED Color Organ Page


Jerry

Jerry, thanks for the link. I have seen it before but the fact that the guy used 49 LEDs put me down since I don't know if that circuit can handle 30W with 5 meters of LEDs.

EDIT: And I can't control the LED Strip without a sound reactive feature activated.
 
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You misunderstood what I wanted to say...

That would be the basic circuit... It needs to be modified for
your application...
You would truncate the other LED drivers and only use the 3
(Hi Med Lo) that you need...

To handle 30 watts.. you would increase the current handling
capacity of the 3 output drivers using a suitable MosFet...

I'll do a few tests when I get to the shop on Monday or Tuesday...
I'll let you know what I come up with...;)

Jerry
 
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You misunderstood what I wanted to say...

That would be the basic circuit... It needs to be modified for
your application...
You would truncate the other LED drivers and only use the 3
(Hi Med Lo) that you need...

To handle 30 watts.. you would increase the current handling
capacity of the 3 output drivers using a suitable MosFet...

I'll do a few tests when I get to the shop on Monday or Tuesday...
I'll let you know what I come up with...;)

Jerry

Thank you all very much for your help :) I really appreciate it.
 




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