building a sound board
Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=111521
Printed Date: April 28, 2024 at 3:02 PM
Topic: building a sound board
Posted By: SoundImage
Subject: building a sound board
Date Posted: February 11, 2009 at 11:26 PM
does anyone have a diagram for a switcher i am building a sound board and would like to use a momentary ground to activate each radio but only one at a time. any suggestions would be great
Replies:
Posted By: i am an idiot
Date Posted: February 12, 2009 at 6:52 AM
How many radios and how many speakers are you planning to have on the board? Front and Rear speakers. or just one or the other?
Posted By: SoundImage
Date Posted: February 12, 2009 at 10:47 AM
about 5 radios and just a few pairs of speakers but i want the radios and speakers switched individually
Posted By: i am an idiot
Date Posted: February 12, 2009 at 11:21 AM
Front and Rear speakers. or just one or the other? Either way it will be pretty easy to do. You will need 4 4pole double throw relays to switch 5 radios. You will also need 4 relays to switch between 5 sets of speakers. That is if you have only front or rear speakers. The way it will work is if radio one is on it will play. If you turn on any of the other radios, they will take over. You can have all radios turned on at one time, but only the last radio in line will play. Turn off radio 5 and 4 will begin to play. Turn off radio 4 and 3 will play. Turn 5 back on it will take over. Same with the speakers, the speakers will require a switch for 4 of the speakers. The radios will switch via the amp remote wire of the deck. This will take a good bit of soldering on your part, I will be happy to draw you a picture. Radio used to sell a relay but it appears that they have discontinued it. You need a 4PDT relay with a 12Volt coil. Like I said you will need 8 to do 5 radios and 5 speakers.
Posted By: SoundImage
Date Posted: February 16, 2009 at 1:26 PM
ok i'm pretty familiar with spdt relays but 4pdt relays are new to me, there's quite a few pins can i get a diagram.
Posted By: i am an idiot
Date Posted: February 16, 2009 at 8:59 PM
It would help if I knew the pin layout of your relays. I could draw it exactly as the relays are laid out.
Posted By: hotwaterwizard
Date Posted: February 16, 2009 at 11:16 PM
relay_selector.pdf https://www.siliconchip.com.au/cms/A_105741/article.html here is the circuit that can switch up to 10. Use several for a great board ------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: February 25, 2009 at 8:15 AM
just to switch the relay buttons it will take 25 cube relays, then for the power and speaker outputs it will take 6 for each component that is 30 more and 40 more for 5 sets of speakers speakers that is almost 100 relays to do the job.
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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: February 26, 2009 at 1:46 AM
OKAY after many hours of thought I figured it out.car_stereo_display.pdf 
------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: i am an idiot
Date Posted: February 26, 2009 at 5:32 AM
SoundImage, don't be scared, if you get the relays and post a diagram of the layout of the pins, my picture will be much less intimidating and you will be able to do it. The remote turn on wire from the radios will control the switcher for the radios. You will have to have 4 switches to control the speakers. In the diagram above they appears to be 5 Pole Double Throw relays. You need 4 Pole Double Throw relays to do it the way I am planning.
Posted By: hotwaterwizard
Date Posted: February 26, 2009 at 8:31 AM
in my diagram you could use a bunch of cube relays if you just tie all of the coils from each set together, ------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: February 26, 2009 at 9:49 PM
Double check this for me, I think I made a shorter version of the control. 
------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: February 27, 2009 at 12:08 AM
Here is a version I drew up using Cube relays! 
------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: February 27, 2009 at 12:23 AM
We could even add a Digital display to it if we want. Use 470 0hm resistors for 12v 
------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
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