Audio Frequency Driven LED's (HELP!) - Electronic Circuits Projects Diagrams Free

iONic · 29th March 2006, 06:11 PM

I have a circuit that takes the audio input from my home stereo or CD portable CD player and drives LED's as a result of the beat or signal intensity.

http://www.bakpakr.com/TPXFER/strobe.gif

What I really want to do is to improve this by having 3 different set of LED's, perhaps Red, Green, Yellow that will correspond to specific signal frequencies as apposed to the whole audible spectrum. For example:
the Red LED's would follow the signal intensity for the Base frequencies (20Hz - 320Hz), Green for 320Hz - 5.12kHz, and Yellow for 5.12kHz - 20kHz.

Frequency filtering is really new to me so I could use as much help as possible here!

Thanks!

chemelec · 29th March 2006, 11:42 PM

It is Called a Color Organ. They were very popular in te 60's and 70's.

There is a fairly good One on my Website that runs Incandescent Bulbs.

In a Few Days there will be another one to run LED's or whatever for use in a Car or any 12 volt DC system.

These both use simple "Active Filters".

If you want SIMPLER, you would use "Passive Filters" but you will still need some Transistors or ICs to amplify the signal and supply power to the LED's

Gary

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29th March 2006, 06:11 PM	(permalink)
iONic	Audio Frequency Driven LED's (HELP!) I have a circuit that takes the audio input from my home stereo or CD portable CD player and drives LED's as a result of the beat or signal intensity. http://www.bakpakr.com/TPXFER/strobe.gif What I really want to do is to improve this by having 3 different set of LED's, perhaps Red, Green, Yellow that will correspond to specific signal frequencies as apposed to the whole audible spectrum. For example: the Red LED's would follow the signal intensity for the Base frequencies (20Hz - 320Hz), Green for 320Hz - 5.12kHz, and Yellow for 5.12kHz - 20kHz. Frequency filtering is really new to me so I could use as much help as possible here! Thanks!

29th March 2006, 11:42 PM	(permalink)
chemelec	It is Called a Color Organ. They were very popular in te 60's and 70's. There is a fairly good One on my Website that runs Incandescent Bulbs. In a Few Days there will be another one to run LED's or whatever for use in a Car or any 12 volt DC system. These both use simple "Active Filters". If you want SIMPLER, you would use "Passive Filters" but you will still need some Transistors or ICs to amplify the signal and supply power to the LED's Gary __________________ I No Longer accept Private Messages on here. All Emails to me Must Contain the Word \"Electronic\" in the \"Subject Line\" or they go Directly to my Junk Mail Folder. Email me at: chemelec@hotmail.com Website: http://www3.telus.net/chemelec