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How apple earpods send the volume up/down signal?
Old 1 week ago
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How apple earpods send the volume up/down signal?

I am trying to trigger an iphone's camera from 3.5mm Jack with my own devalopment board. I figured it out volume up/down signal is trigging the iphone's camera but i managed it at an android device with touching an 220R or 600R resistor from mic pin to gnd pin.Iphone didnt even recognize my board as a headphone.

An 10K resistor from mic pin to gnd pin gives me the recognition as a headphone for iphone but touching an 220R or 600R resistor from mic pin to gnd pin does nothing.

Thank you.
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