Color organ set-up

M

MostOner

New Member

• Feb 7, 2011

• #1

Hi,

Just a quick question about the light that I can use for this type of color organ 3 Channel Sound Activated Color Organ Kit-The Electronic Goldmine

It says that any light will do but if I solder one Luxeon Rebel High Power LED to each AC outlets will it work or do I need resistors?

If I can't use those High power LED what kind of lighting would you suggest?

This is my first project so any advice is welcome

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 7, 2011

• #2

From the look of it, you need normal mains light bulbs.

 

audioguru

Well-Known Member

Most Helpful Member

• Feb 7, 2011

• #3

LEDs operate from low voltage current-limited DC, not high voltage high current AC.
So make a video of your LEDs blowing up and post the video here.

 

Reloadron

Well-Known Member

Most Helpful Member

• Feb 7, 2011

• #4

That kit is designed for incandescent 120 volt lamps. I am familiar with it.

Years ago I used one to power strings of C7 bulbs (old style christmas tree). It was pretty cool. Anyway, it uses 3 SCRs to run standard 120 volt AC incandescent bulbs. You are good up to about 200 watts per channel.

Ron

 

Last edited: Feb 7, 2011

M

MostOner

New Member

• Feb 8, 2011

• #5

Thank you for the comments.

I should have read more about LEDs...

 

Reloadron

Well-Known Member

Most Helpful Member

• Feb 9, 2011

• #6

This link is to a page containing links to color organ circuits. Among them is this 12 volt DC version. It could likely be modified for use with LEDs. However, I am not sure how well it would work out.

Generally the intensity of a LED is changed using PWM (Pulse Width Modulation) and not simply varying the current (voltage).

A Google of LED Color Organ Kit brought up plenty of hits so you may want to try that if LEDs are the goal.

Ron

 

M

MostOner

New Member

• Feb 10, 2011

• #7

Thx Reloadron,
I bought the kit from Electronic Goldmine for a fun project but I have something new on my mind now.
I need to make a portable sound activated LED. LED must respond to sound and light up depending how strong the sound is. If no sound, no light.

I did some searching and found this schematic. (see attached)
It looks simple enough but is this what I need?

 

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Reloadron

Well-Known Member

Most Helpful Member

• Feb 10, 2011

• #8

The circuit you posted is sort of crude but would work, not great but should work. It lacks a sensitivity adjustment. This is one of those things that depends on how fancy you want to get.

Ron

 

audioguru

Well-Known Member

Most Helpful Member

• Feb 10, 2011

• #9

I think the very simple circuit will not be sensitive enough because the low input impedance of the first transistor loads down the mic and the low input impedance of the second transistor loads down the first transistor.
If you hold the mic close to your mouth and speak loudly then it will work.