Need help with simple project

Splash · 13th September 2005, 06:31 AM

Hiya,
I'm hoping one of you guys can give me a hand with a project im working on. after browsing the forums it seems like it should be pretty easy for you. Ive made some regular electronic projects but im pretty new to audio electronics.

Basicaly i have a problem where i have lot of audio outputs from various sources such as DVD player, VHS player, TV, PS2, Laptop, Desktop, Stereo. and have a good few inputs such as Surround sound, Headset, Wireless headphones, TV etc etc. At the moment i am constantly crawling under and behind my desk when i want to change what im hearing and how.

So, I have come up with the idea of having an audio junction box, where i have a plastic enclosure box, on one side i have a row of inputs phono and 3.5mm jack, and on the other side I have a row of 3.5mm outputs, all of which has its own switch so i can turn in/outputs on and off.

Here is a picture of the basic layout, but im not sure of what it will do to the sound quality and if i need some sort of op amp or what.

Splash · 13th September 2005, 09:51 AM

Sorry just to clarify, I'm not asking anyone to build it for me, simply what is missing from my picture, and if it will work or not

rabbitz · 13th September 2005, 12:51 PM

Just connect your inputs to a rotary switch and your outputs to one as well.

2 pole 6 position break before make like these will do the job.

http://www.altronics.com.au/index.as...=item&id=S3022

Inputs to the outside connectors (input sw) > out from the inside 2 connectors (input sw) > inside 2 connectors (output sw) > outside connectors (output sw)

Better than having individual switches that you can forget to turn off and have 4 sources playing at once.

Splash · 13th September 2005, 07:01 PM

Ok,
I've never used rotary switched before and am not certain how they work, is this what you mean and how they work?

ctardi · 13th September 2005, 09:14 PM

That would work. You sould download expressPCB, comes with a free schematic program.

rabbitz · 14th September 2005, 11:56 AM

Keep your left channel to 1 pole and right channel to the other pole. You've got the idea but make sure you don't join the RCA inputs as you have shown.... treat it the same as the 3.5mm jacks.

All the grounds on the inputs and outputs are joined together at 1 point and bypass the switches.... only hot wires on the switches.

Splash · 18th September 2005, 09:36 AM

Quote:

Keep your left channel to 1 pole and right channel to the other pole. You've got the idea but make sure you don't join the RCA inputs as you have shown.... treat it the same as the 3.5mm jacks.

All the grounds on the inputs and outputs are joined together at 1 point and bypass the switches.... only hot wires on the switches.

Hmm, Not really sure what you mean. should the RCA have their own switch in that case?

And do you mean all the ground wires should connect together not touching the switches?

Splash · 20th September 2005, 08:47 AM

Ok, im off to maplins this afternoon to pick up the parts, heres what im going to get, please correct me if I'm missing anything or bits are wrong...

Switches x 2

knobs x 2

Enclosure x 1

3.5mm Jacks x 9

Phono connectors x 2

rabbitz · 21st September 2005, 11:51 AM

Quote:

Originally posted by Splash

Hmm, Not really sure what you mean. should the RCA have their own switch in that case?

And do you mean all the ground wires should connect together not touching the switches?

What I mean is that you only connect the centre pin of the RCA to the switch.... same as the 3.5mm.

Ground wires by pass the switch all together and all connect to 1 point.

Splash · 23rd September 2005, 01:30 PM

Ah ok, Think im with you now

made another quick diagram just to make sure....

This right?

13th September 2005, 06:31 AM	#1
Splash diyAudio Member Join Date: Sep 2005	Need help with simple project Hiya, I'm hoping one of you guys can give me a hand with a project im working on. after browsing the forums it seems like it should be pretty easy for you. Ive made some regular electronic projects but im pretty new to audio electronics. Basicaly i have a problem where i have lot of audio outputs from various sources such as DVD player, VHS player, TV, PS2, Laptop, Desktop, Stereo. and have a good few inputs such as Surround sound, Headset, Wireless headphones, TV etc etc. At the moment i am constantly crawling under and behind my desk when i want to change what im hearing and how. So, I have come up with the idea of having an audio junction box, where i have a plastic enclosure box, on one side i have a row of inputs phono and 3.5mm jack, and on the other side I have a row of 3.5mm outputs, all of which has its own switch so i can turn in/outputs on and off. Here is a picture of the basic layout, but im not sure of what it will do to the sound quality and if i need some sort of op amp or what.

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13th September 2005, 09:51 AM	#2
Splash diyAudio Member Join Date: Sep 2005	Sorry just to clarify, I'm not asking anyone to build it for me, simply what is missing from my picture, and if it will work or not

13th September 2005, 12:51 PM	#3
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Just connect your inputs to a rotary switch and your outputs to one as well. 2 pole 6 position break before make like these will do the job. http://www.altronics.com.au/index.as...=item&id=S3022 Inputs to the outside connectors (input sw) > out from the inside 2 connectors (input sw) > inside 2 connectors (output sw) > outside connectors (output sw) Better than having individual switches that you can forget to turn off and have 4 sources playing at once.

13th September 2005, 07:01 PM	#4
Splash diyAudio Member Join Date: Sep 2005	Ok, I've never used rotary switched before and am not certain how they work, is this what you mean and how they work?

13th September 2005, 09:14 PM	#5
ctardi diyAudio Member Join Date: May 2005 Location: Maple Ridge	That would work. You sould download expressPCB, comes with a free schematic program.

14th September 2005, 11:56 AM	#6
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Keep your left channel to 1 pole and right channel to the other pole. You've got the idea but make sure you don't join the RCA inputs as you have shown.... treat it the same as the 3.5mm jacks. All the grounds on the inputs and outputs are joined together at 1 point and bypass the switches.... only hot wires on the switches.

20th September 2005, 08:47 AM	#8
Splash diyAudio Member Join Date: Sep 2005	Ok, im off to maplins this afternoon to pick up the parts, heres what im going to get, please correct me if I'm missing anything or bits are wrong... Switches x 2 knobs x 2 Enclosure x 1 3.5mm Jacks x 9 Phono connectors x 2

23rd September 2005, 01:30 PM	#10
Splash diyAudio Member Join Date: Sep 2005	Ah ok, Think im with you now made another quick diagram just to make sure.... This right?