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Step 3Circuit Diagram
Heres the basic circuit diagram. I was having problems when I didn't use these resistors mentioned by Curt. When I connected more than two audio sources, one would be barely audible. This volume drop was being caused by signal interference. Adding the resistors solved the problem by raising the total resistance to interference to 9.4k ohms instead of just 4.7k ohms. I dunno entirely why it works, but just trust Curt on this one.
Basically, all input lines have a wire and then a 4.7k resistor attached. Each side (all 3 Right channels, and all 3 Left channels) are then soldered together after the resistors, and another wire runs from that connection to the appropriate pole on the 3.5mm stereo jack.
Instead of soldering everything at once, I used alligator clips to check as I progressed...but essentially, once things are soldered together, you just need to tape or heatshrink the connections.
Then you are almost DONE!
Basically, all input lines have a wire and then a 4.7k resistor attached. Each side (all 3 Right channels, and all 3 Left channels) are then soldered together after the resistors, and another wire runs from that connection to the appropriate pole on the 3.5mm stereo jack.
Instead of soldering everything at once, I used alligator clips to check as I progressed...but essentially, once things are soldered together, you just need to tape or heatshrink the connections.
Then you are almost DONE!
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