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Author Topic: safe to upload to externally powered Arduino Mega?  (Read 384 times)
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Jr. Member
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If I leave a Mega externally powered all the time, connected to its barrel jack.... is it safe to plug the USB into my computer for uploading a new program to it?  Or does this create an unsafe 5V conflict with my computer's USB port, and/or stress the voltage selection circuitry on the Mega?

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The Mega switches power sources automatically. It is safe to have both connected at the same time.
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