Comments on: Audio output selector

By: Kris

Kris — Thu, 26 Jan 2012 01:50:53 +0000

Thanks for the comment. Yes, all of the ground connections are connected together. The 3.5mm jacks should have 3 solder lugs: 1 for left audio, 1 for right audio, and 1 for ground. All of the ground lugs should be connected together.

By: Trevor

Trevor — Wed, 25 Jan 2012 19:26:25 +0000

This is EXACTLY what I was looking for. Didn’t want to spend $20 + $20 shipping on a device I could make for a few bucks. Question: When you mention, “Even with the DPDT switch, the grounds are connected together at all times”, are the grounds for the jacks connected TO anything within the box (like, each other), or are they taken care of by the male connectors?

A little new to electronics.

Thanks

By: Kris

Kris — Mon, 16 Jan 2012 03:26:28 +0000

I used Cadsoft Eagle which is fairly easy to use if you intend on making a printed circuit board. However, if you just want to make a simple drawing, it probably isn’t the best solution.

By: Patrick

Patrick — Sun, 15 Jan 2012 06:57:59 +0000

What program did you use to make the drawing? I looking for a real simple cad type program for drawing such as this.

By: Kris

Kris — Wed, 29 Jun 2011 18:40:50 +0000

Roochie, check your audio cable. You might be using a cable with TS jacks (mono). You can tell by looking at the jacks. The link below has a picture of 4 jacks. The jacks from left to right are: 2.5 mm TS, 3.5 mm TS, 3.5 mm TRS, and 6.35 mm TRS. All of your audio cables must have TRS jacks for stereo sound. Thanks for the comment!

http://en.wikipedia.org/wiki/File:Photo-audiojacks.jpg

By: roochie

roochie — Tue, 28 Jun 2011 16:28:17 +0000

I’m trying to build my own audio switch which is essentially exactly the same as this one. Problem is when testing my TRS sockets, I get mono sound (i.e. audio is only coming out from my left speaker) I’ve checked my wiring over and over so I doubt its that. Could it be that my TRS socket only plays Mono? I just need clarification on whether there is are mono only sockets and stereo sockets.

By: kris

kris — Fri, 23 Oct 2009 16:18:57 +0000

@jared
I like the idea of using a potentiometer to passively adjust the gain. Usually I have the maximum gain at the output of my PC which is good for my computer speakers, but bad for my headphones. The potentiometer would allow me to passively lower the gain for the headphones while delivering the maximum gain to the speakers.

Unfortunately you have to use a DPDT switch because it is a 2-channel stereo signal. Even with the DPDT switch, the grounds are connected together at all times. Thanks for the comment!

By: Jared Huntington

Jared Huntington — Fri, 23 Oct 2009 07:48:37 +0000

You can always adjust the gain passively by just using a potentiometer. An op amp would be nice for boosting signals though. You could also just use a SPDT and leave the grounds connected together at all times. Nice work! I need to make one of these.

By: Sam

Sam — Fri, 23 Oct 2009 02:18:24 +0000

jackpot. this is so cool!