This is a simple 3.5mm TRS stereo audio jack with a screw-on plastic shroud. These are great for projects that plug into headphone jacks. Stereo plugs can
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Audio Plug - 3.5mm - COM-11143 - SparkFun Electronics
Enginursday: Digging into the Werkstatt - News - SparkFun Electronics
A Diverse Selection of Electronics Books, Breakout Boards, and Development Tools, PDF, Switch
Enginursday: Digging into the Werkstatt - News - SparkFun Electronics
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Audio Plug - 3.5mm - COM-11143 - SparkFun Electronics