SOLVED] - OpAmp driven RX/TX activity LED for UART. | Forum for Electronics
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Controlling LEDs via UART — Exchanging Text-based Data Between Two Boards — XOD
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arduino - How do I hook up an LED across the tx pin on my Atmega328? - Electrical Engineering Stack Exchange
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Controlling LEDs via UART — Exchanging Text-based Data Between Two Boards — XOD
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UART RX TX LED Driver using Op-Amp | Forum for Electronics
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