Consultant Frank Hertel sees a lot of electronic devices, both consumer and broadcast, that use 3.5 mm Tip-Ring-Ring-Sleeve (TRRS) connectors. However, many of them use non-standard wiring ...

I have for the last couple of years(!) had issues with the various pinouts mobile manufacturers have used. Lately, all major manufacturers seems to have agreed to use AHJ, but some headsets still ...