Asking for any other ideas other than trying to accurately measure a tiny voltage. The point is to protect the headphone amp by not running it into a shorted load.
When I am talking about adding DC, I am talking through a large value resistance and sensing the voltage division (or shorted to ground). The current through the transducer would be very small. The problem is detected...
I am using the headphone output on the WM8731 codec for line out or optionally headphone out. I want to detect the difference between a mono 1/4” plug (line out) and a stereo (headphone out) when the connector is...
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