In a recent post I asked for help designing bluetooth earbuds that still have the option to be plugged in through an aux cord. After taking polls and doing some research I've come to the conclusion that there are many people suffer from the same problem and I know we can come up with a way to add a 3.5mm input to bluetooth earbuds. I have created a circuit that can do this but you have to manually use a switch to change the path of the incoming signals so that they dont get sent into the receiving circuit itself, that would permanently destroy it. But that has to be done every time and it could easily be forgotten. Does anyone else have a better solution?