I require a bit of guru input. I have 2 x 3.5mm stereo female jacks, the 1st is a speaker output, and the 2nd is a headphone out. These jacks are waterproof and this variety do not include the detection pin, only two pins +v and -v.
Essentially I am trying to achieve an auto detect. When the headphones are plugged in the headphones are enabled and work, and when the speakers are plugged in the speakers are enabled and work. Most of the TI and Maxim chips require more than 2 pin female jacks to function. I understand the auto detect can be detected by a resistor network combo but I cannot find this.
Could anybody offer me advice on my design.