Hi everyone
I'm new to this forum and I need some expert help on a color organ that I've been trying to make.
The color organ that I need will have a microphone input (as opposed to a direct connection to a speaker), and will only have a low-pass filter.
Some details: The input voltage must be 12V DC 2000mA. The output can be 12V.
The color organ will drive one of these: http://www.superbrightleds.com/specs/FLB.htm

I can provide any other details!
Thanks in advance

 

Hello,

Does the signal only switch the leds or do you want also intensity changes visible?
What frequency do you want the lowpass filter to be?

Greetings,
Bertus

 

The LED will only switch on. I do not need the intensity to change.
Is it possible to use a potentiometer to vary the frequency between around 80Hz to 150Hz? If not, around 100 Hz should be OK.
Thank you!

 

Hello,

You could use one of the schematics on this page as mic-amplifier:
http://sound.westhost.com/project13.htm
You could use the lowpass part from this page as filter:
http://sound.westhost.com/project81.htm

Then you will need a comparator to set the level when the leds turn on and off.

Greetings,
Bertus

 

hi
I assume it is Figure 2 for this link
http://sound.westhost.com/project13.htm
and the bottom part of figure 1 for this link?
http://sound.westhost.com/project81.htm

 

Hello,

You are right. In the preamp you can change the gain as needed with a resistor.
The lower part of the other picture is indeed the lowpass filter.
On the bottom of the page there is a list of frequentions given.

Greetings,
Bertus