Computer (PC) Headset Microphone and Headphone Adapter by W6JMF
Coco-Mic --- the DIY Studio Quailty USB Mic (MEMS Technology) : 18 Steps (with Pictures) - Instructables
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