I am trying to build a small circuit which will connect my phone, laptop and headset with a switch.
So in state 1, the headphone and phone will be connected
and in state 2, the headphone and laptop will be connected.
Just DIY stuff so I need not frequently disconnect/connect headphone from/to each device.
The circuit will have three female audio jack with connection shown in diagram(did not get the right tool. so its not much appealing but gives the over all idea)
The headphone which I use has 3.5mm TRRS jack so which translates as
Tip --> Left --> L
Ring --> Right --> R
Ring --> Ground --> G
Sleeve --> Microphone --> M
Which of the below approach can be used?
- Connect(Short) every terminal except ground to every other female jacks and toggle ground between headphone/phone and headphone/laptop.
Here I realised that connecting R,L of Phone to R,L of laptop might be an issue as R,L is output port and here I am trying to connect a output of two device back to back. So I came up with point 2.
- The connection as mentioned in the diagram. The DPDT switch will toggle R,L between two device and the other will be isolated. This will solve the issue in point 1 but is it okay to connect ground of phone and laptop at all time?
Mic is not a problem(I feel so) as it is always a input port and doesn't matter if my laptop gets the input when I am talking over Phone.
I am confused on which approach I should use and do the circuit and also not blow up my laptop or phone audio device.
Also I would like to hear if there are any other factors to be considered for this circuit.