Accidental short circuit
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Hello!
For my project, I want to control a pressure regulator using PWM. During this process, I think I accidentally created a short circuit. I assume it happened whilst attaching the probes of an oscilloscope to one of the PWM/servos pins on the Duex.
Now, when I connect the Duet with my laptop, the LED between the USB connector and the reset button is permanently red. The 5V LED is first very bright and then slowly dims. The 3.3V LED is green for about a millisecond and then stops. When I plug the USB cable into my laptop (MacBook), I get a notification that I have to ‘unplug the device using too much power’.
Is there a way to check whether the Duet or the Duex is broken (or both) and how I can fix it? Thanks!
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Thanks!
According to that page, most likely there is a short between the 3.3V power rail and ground. I went through all steps but, unfortunately, I still have the same problem as mentioned in my original post. -
@luukvk said in Accidental short circuit:
Is there a way to check whether the Duet or the Duex is broken (or both) and how I can fix it? Thanks!
Well I think you've verified that it's broken. As for how to fix it, that would be a lot more involved and may not be worth it.
When connected to power, do any of the chips get noticeably hot? Do you see any burn holes or scorches on any of the chips?
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@Phaedrux It is broken indeed. As can be seen, this chip is burned. Unfortunately, I can't see what chip it is, I have included the second image for reference.
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There's a possibility that the failed regulator was not caused by a short, so I authorise a warranty replacement for your Duet. Please contact your supplier.
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@dc42 I will, thank you!