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  • 3DS3 commented on misan's instructable 4xiDraw9 months ago
    4xiDraw

    Thank you! Do you know/can you guess what may have gone wrong when plugging the uno to power and the usb to my laptop, which forced laptop to reboot and permanently damage the arduino? I've checked the power supply gives const voltage ~11.8 V in operation and is only 1.25A. I've done the soldering correctly, maybe with a little too thin wire, but it did not get hot. My only guess (because on pololu clone was burnt at some point) is that a pololu clone was faulty and short-circuited something. But how did this destroy two arduinos? When I now plug those arduinos in my laptop, the arduino IDE does not even detect the port... Any clues/help? I am too afraid to try with a third arduino and the soldering trick...

    Hi Misan,Can I ask you whether/why it is necessary to power the shield through the arduino? I am now powering the shield directly from the screw terminals and the machine seems to be working fine (with your version of the firmware and no other changes). The reason I tried that is that I seem to have destroyed two arduino Uno clones (Sintron) when I was powering everything from the arduino using the soldering trick. I don't know what went wrong: the machine was working fine, but sometimes when plugging the usb in would turn my macbook screen blank and force my laptop to reboot, while permanently making the arduino invisible to the arduino IDE... Any ideas? Another minor problem/concern I have is that the servo (SG90) slowly builds up heat and eventually becomes hot, though it works fine....

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    Hi Misan,Can I ask you whether/why it is necessary to power the shield through the arduino? I am now powering the shield directly from the screw terminals and the machine seems to be working fine (with your version of the firmware and no other changes). The reason I tried that is that I seem to have destroyed two arduino Uno clones (Sintron) when I was powering everything from the arduino using the soldering trick. I don't know what went wrong: the machine was working fine, but sometimes when plugging the usb in would turn my macbook screen blank and force my laptop to reboot, while permanently making the arduino invisible to the arduino IDE... Any ideas? Another minor problem/concern I have is that the servo (SG90) slowly builds up heat and eventually becomes hot, though it works fine. Your input would be very much appreciated.

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