Go Back   Home > Forums > General Interest > Music

Music A place to discuss the thing we are doing all this other stuff for

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 7th February 2003, 11:43 AM   #1
Banned
 
Join Date: Nov 2002
Location: Adelaide, Australia
Send a message via MSN to SkinnyBoy
Default Flashing light in time to the music?

Hello, I am looking to make a SIMPLE circuit with adjustable sensitivity that operates a relay in time to the music... I would liek it to accept a line level signal if possible, and operate from 12volts and switch a 12volt relay... I really don't know where to start.. I tried searching the internet, but didn't really know where to begin.. Thanx for all the help. .
  Reply With Quote
Old 7th February 2003, 01:32 PM   #2
Schaef is offline Schaef  United States
diyAudio Member
 
Join Date: Jan 2001
Location: Cuyahoga Falls, OH
Go to your favorite electronics kits site, and do a search for a "color organ" that'll get you what you're looking for. You could also do a google search for color organ circuit, which should return something as well.

Hope this helps you out!
  Reply With Quote
Old 7th February 2003, 01:40 PM   #3
alvaius is offline alvaius  Canada
diyAudio Member
 
Join Date: Feb 2002
Location: Toronto
I put something like this together years ago. Going off of memory, it was nothing more than an op-amp in a high pass configuration (to eliminate DC), a second stage that provided a huge amount of gain, a diode at the output of that stage (not a schottky, too high of leakage), a capacitor to ground, a high value resistor parallel to the CAP that would set the turn off delay, and then the positive lead of the cap into the gate of a MOSFET which would turn on the relay.

Now, I just use one of the switched outputs of my AV receiver to control a relay that turns everything else on, but I am guessing you are turning on a sub or something remote.

If the above is too tough to follow, I can put a quick schematic together, but no guarentees it will be right the first time.

Alvaius
  Reply With Quote
Old 7th February 2003, 01:40 PM   #4
Banned
 
Join Date: Nov 2002
Location: Adelaide, Australia
Send a message via MSN to SkinnyBoy
yeah, I found colour organs, but they generally ran from the mains, and used triacs to switch the globes... I will search again however..
  Reply With Quote
Old 7th February 2003, 01:42 PM   #5
Banned
 
Join Date: Nov 2002
Location: Adelaide, Australia
Send a message via MSN to SkinnyBoy
alvaius, I thinl we are talking about different things..
  Reply With Quote
Old 10th February 2003, 03:18 PM   #6
Schaef is offline Schaef  United States
diyAudio Member
 
Join Date: Jan 2001
Location: Cuyahoga Falls, OH
Quote:
Originally posted by SkinnyBoy
yeah, I found colour organs, but they generally ran from the mains, and used triacs to switch the globes... I will search again however..

You are correct in that, that's what most of the do, but there's nothing that says you can't adjust and use 12volts instead of 120volts. (Can't you just feed 12volts through the triac, and get that, its a maximum voltage, isn't it?) If you use the basics presented in those circuits, you should be able to scale them down a little and get what you want.

Why are you hooked on a relay? If what you're looking for is something along the lines of the color organ, the relay won't respond fast enough and will be constantly switching on and off. Or are you looking for some type of threshold device that'll kick on when music is played? (similar to a lot of subwoofer amps)
  Reply With Quote
Old 10th February 2003, 09:42 PM   #7
Banned
 
Join Date: Nov 2002
Location: Adelaide, Australia
Send a message via MSN to SkinnyBoy
Yes, a relay is the wrong idea.... also, triacs only work with AC... I believe I need to use a transistor or mosfet then....
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Flashing EL34 electropt Tubes / Valves 32 2nd November 2012 03:39 AM
Music to light modulator jimbo12d Parts 0 19th August 2008 04:25 PM
Tube flashing safetyman Tubes / Valves 15 7th September 2005 02:26 PM
Decision Time, MB20/MB27 vs Northcreek Echo vs GR A/V1 for HT/Music dcourtney Multi-Way 0 13th January 2005 06:52 AM
how? --> making a flashing led multiplexor Parts 31 19th January 2003 12:33 PM


New To Site? Need Help?

All times are GMT. The time now is 02:34 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2