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PARTS: 3.5MM STEREO AUDIO JACKS
3.5mm stereo connectors for headphones and microphones are nearly mandatory for audio projects. X1 (left) is a basic plug with connections for the audio channels (pin 2,3), and ground (pin 1). X2 (right) has pass-through contacts (pin 2,3) that divert audio to an internal speaker when headphones aren’t connected. Here’s a breakdown of the audio […]