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![SOLVED] - Tx pin not outputting when Arduino Uno is powered by 9v barrel jack - Networking, Protocols, and Devices - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/6/6/3/663d7eb51015c39fa341aaa6f7b03b773129f073_2_690x465.jpeg "SOLVED] - Tx pin not outputting when Arduino Uno is powered by 9v barrel jack - Networking, Protocols, and Devices - Arduino Forum")
SOLVED] - Tx pin not outputting when Arduino Uno is powered by 9v barrel jack - Networking, Protocols, and Devices - Arduino Forum
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