Redmi audio earphone pin configuration and connections
Redmi 1s mobile phone from XIOMI brand is an android smartphone. Here i am posting the details of it's audio output jack. It has four wire connection, namely, GROUND, AUDIO1, AUDIO2 and MIC. Ground pin is shared with all three in to form closed loop circuits to each other. There are two audio outputs i.e. audio-left (ground + audio1) and audio-right (ground + audio2). MIC pin is used for audio input through microphone and this is connected as groung + mic. See above image3 for actual layout of the jack.
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