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3.5mm stereo audio jack

The audio jack allows you to insert a 3.5mm ( 1/8" ) stereo headphone jack for audio output. When a jack is inserted, the speaker pads on the board are automatically disconnected. This jack is connected to the audio amplifier, and as such and produce high volume levels into headphones and stereo input - take care to adjust the volume level down before inserting. Although the Soundgin IC produces only mono sound, it is internally connected inside the jack to both the left and right output channels. Orient the jack so that the connection is facing out from the board.