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Topic: Burned a diode near the Arduino Mega's USB port (Read 231 times) previous topic - next topic


Mar 26, 2020, 08:32 pm Last Edit: Mar 27, 2020, 01:49 pm by ballscrewbob
I was building a 3D printer on the Arduino Mega+RAMPS 1.4 electronics and had a 5V usb supply connected to the Mega when the printer was running. There was a spark seeing which I switched off the whole machine. I found that a diode next to the usb port was burnt. Is there anyway I can salvage this Mega ?

(mod edit)


Mar 27, 2020, 01:52 pm Last Edit: Mar 27, 2020, 01:54 pm by ballscrewbob
Some of the cheaper CNC shields can short on on the USB case.

Usually I place some insulation tape over it to prevent that.

The diode can probably be replaced ( see schematic )
But that does not guarantee a fix if any other items have been damaged.

BTW is that a true Arduino as there should be a RESET button close to that position ?

It may not be the answer you were looking for but its the one I am giving based on either experience, educated guess, google (who would have thunk it ! ) or the fact that you gave nothing to go with in the first place so I used my wonky crystal ball.


Thanks for the update. I'll try replacing the diode and see if works.

I bought this board sometime back, I think it's a clone.

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