Strangly when i insert an audio to audio cabel into the the smarthphone audio jack the multimeter shows me max. 0.1 V.
But if the cabel is just half inserted in the audio jack the multimeter shows me a Voltage of 2.4V
Can someone explain how this is possible and how much Voltage i can exepct from and smarthphone audio jack?
I am mearsuring between ground and mic on a headset connector.
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