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I am planning a build with my own enclosure for the arduino due. As an alternative i would like to bypass the power jack and usb port that are factory soldered onto the board, in order to use jacks mounted on the enclosure, along with a power switch.

I've looked at the info regarding the boards pin configuration at https://www.arduino.cc/en/pmwiki.php?n=Main/arduinoBoardDue, and would appreciate if someone could confirm or correct this:

  1. Can i use an external 9V adapter through a jack connected to the Vin and GND pins, respectively?

  2. According to This question, you can't connect an alternative programming USB port to Serial 0 TX/RX pins (Mega board). If this applies to the due as well, what do i need to break out the programming USB port?

Edit: Perhaps one of these puppies is the least complicated solution?

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  • You can't connect a USB socket or USB cable - but you can connect an FT232 adapter cable / board. – Majenko Sep 5 '20 at 16:22
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    your Edit is the answer ... use pigtails for all connections ... insert a switch into the power pigtail – jsotola Sep 5 '20 at 19:09
  • you could reprogram the ATmega16U2 to existing programming port and release the serial0 pins for your use ... or use the ATmega16U2 as a serial port gateway between JP5 and serial0 – jsotola Sep 5 '20 at 19:21
  • @jsotola Thanks for your input! – Erik Sep 5 '20 at 21:36
  • the first part of my comment sounds like nonsense ... i did not proofread it ... it should say something like you could reprogram the ATmega16U2 to stop being the programming port and release the serial0 pins for your use – jsotola Sep 5 '20 at 23:16
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so 1 - yes. the VIN pin has a common trace with the barrel jack, you can verify with a multimeter in continuity/beep mode. ive actually put power out through the barrel jack on a mega.

2- i cant find a clear schematic for the due at the moment, but on the mega the rx/tx pins are also common with the usb pins, thus they are not usable while plugged into usb

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