Nonetheless, many people out there still have older Lightning iPhones but haven't yet made the jump to wireless headphones.

The Apple Lightning to 3.5mm Headphone Jack Adapter may have bitten the dust, as it’s sold out at Apple’s online store in the ...

It appears that Apple is discontinuing the Lightning to 3.5mm headphone jack adapter that it released alongside the iPhone 7 ...

This design idea uses asynchronous RS232 to power and count pulses from a simple 10 kHz voltage-to-frequency converter.