| Author |
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LightBoy
Guest
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 Posted:
Thu Mar 10, 2005 12:22 pm Post subject:
LED Color Organ Circuit |
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Greetings to all -
I am designing a device that uses 7 modules of colored LED's that will
be used for a specific purpose for a client. As part of that design, my
client wants to be able to modulate these 7 modules with sound -
voice, music, etc. (Either by microphone or low level input from a
music source).
By "modulate" I mean the intensity of illumination of each 6 LED module
would vary in sync with the volume level of the music - within each
specified bandwidth of any channel's frequency. As is Low - Medium and
High frequency bands.
I have found several schematics on the Internet labeled as "color
organs" but most are only one or two channels - and virtually all use
SCR's to modulate Line Voltage to control incandescent lamps. Does
anyone have - or can anyone point me to where I can find at least a 4
channel schematic - that could be adapted to each channel controlling a
cluster of 6 LED's?
I would be very grateful for any information anyone here could supply.
Very best regards.......
Don H
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petrus bitbyter
Guest
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| Posted:
Thu Mar 10, 2005 5:56 pm Post subject:
Re: LED Color Organ Circuit |
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"LightBoy" <don@nitestarrs.com> schreef in bericht
news:1110435771.541914.152430@o13g2000cwo.googlegroups.com...
| Quote: | Greetings to all -
I am designing a device that uses 7 modules of colored LED's that will
be used for a specific purpose for a client. As part of that design, my
client wants to be able to modulate these 7 modules with sound -
voice, music, etc. (Either by microphone or low level input from a
music source).
By "modulate" I mean the intensity of illumination of each 6 LED module
would vary in sync with the volume level of the music - within each
specified bandwidth of any channel's frequency. As is Low - Medium and
High frequency bands.
I have found several schematics on the Internet labeled as "color
organs" but most are only one or two channels - and virtually all use
SCR's to modulate Line Voltage to control incandescent lamps. Does
anyone have - or can anyone point me to where I can find at least a 4
channel schematic - that could be adapted to each channel controlling a
cluster of 6 LED's?
I would be very grateful for any information anyone here could supply.
Very best regards.......
Don H
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Well Don,
Seems like you have to do some designwork on your own. Cannot be that
difficult. You only need a bunch of OpAmps and maybe some transistors. No
need to connect LEDs to the mains so an 18-24V power supply will do. One
non-inverting amplifier to obtain the required signal level. Set of active
filters to split the frequency range in the bands you need and a amplifier
or transistor for each band to drive the LEDs. I have no source at hand for
calculating the filters but a google for "active filters" or "active audio
filters" will give you plenty of hits.
petrus bitbyter |
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LightBoy
Guest
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| Posted:
Fri Mar 11, 2005 1:17 am Post subject:
Re: LED Color Organ Circuit |
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Dear Petrus,
Thank you for your suggestions. It does look as if I will have to
follow your advice. I was just hoping that someone had already done
something like this before and posted it somewhere - so I wouldn't have
to start at that level. I was directed by another form to a circuit
with 6 channels - using a PIC - that's intriguing, but then I'd have to
get into PIC programming. Not sure I want to get into that yet - but I
might.
Thank you again for your kind response....
Don H
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Rich Grise
Guest
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| Posted:
Fri Mar 11, 2005 4:42 am Post subject:
Re: LED Color Organ Circuit |
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On Thu, 10 Mar 2005 11:17:25 -0800, LightBoy wrote:
| Quote: | Dear Petrus,
Thank you for your suggestions. It does look as if I will have to
follow your advice. I was just hoping that someone had already done
something like this before and posted it somewhere - so I wouldn't have
to start at that level. I was directed by another form to a circuit
with 6 channels - using a PIC - that's intriguing, but then I'd have to
get into PIC programming. Not sure I want to get into that yet - but I
might.
Thank you again for your kind response....
Don H
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Hasn't anyone suggested you go to google search and search for "color
organ"?
Good Luck!
Rich |
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