Making a [4-Pole TRRS to 3.5mm Stereo & Mic Adapter (Male to 2x Female)] from an iphone headphone split… | Earphones wire, Electronic schematics, Headphone splitter
Understanding Audio Jack Switches and Schematics | CUI Devices
Using comparators to detect accessories in portable audio applications - EE Times
Understanding Audio Jack Switches and Schematics | CUI Devices
Nikki Pugh » Circuit-bending a Funky Furby #4: audio jack
Impedance of headphone jacks and detecting connection - General Electronics - Arduino Forum
3.5MM SMT Jack, Stereo, dual open circuit, on tape & reel | Switchcraft
audio - How does the phone detect if 3.5 mm jack circuit is closed? - Electrical Engineering Stack Exchange