I guess I killed it
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If everything is working except WiFi, and nothing (in particular the microcontroller) is getting hot except the WiFi module and possibly the 3.3v regulator (because of the current that the WiFi module is drawing), then there is a good chance that the board can be saved by replacing the WiFi module. With the right tools, it's not hard to replace. When there is over-voltage on the 3.3V rail, the WiFi module and the SD card are usually the first things to fail.
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Thanks David,
how can I check if anything else ist damaged? The regulator seems to be working (because of the light up LED, right?)
If I try to run the delta homing (G28) it tells me, that homeall.g couldn't be found.Yeah I would give it a shot with the hot air gun to desolder it.
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@taconite said in I guess I killed it:
If I try to run the delta homing (G28) it tells me, that homeall.g couldn't be found.
Like I said, the other component that fails early when there is excessive voltage on the 3.3V rail is the SD card. Is the card still readable in a PC? Have you tried a different SD card, populated with the system files?
Is the microcontroller getting hot?
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@dc42 said in I guess I killed it:
@taconite said in I guess I killed it:
If I try to run the delta homing (G28) it tells me, that homeall.g couldn't be found.
Like I said, the other component that fails early when there is excessive voltage on the 3.3V rail is the SD card. Is the card still readable in a PC? Have you tried a different SD card, populated with the system files?
Is the microcontroller getting hot?
SD Card holder ist totally cold --> SD card ist still readable with a PC
microcontroller: It is getting a little warm (but not as hot as the SD card reader) after startup (20s).
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So you are saying that the SD card is getting hot but still works in a PC? I suggest you measure the voltage on the 3.3V rail, it sounds as though it may be high.
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No the SD-card and the SD-card-holder are both cold. The microcontroller ist getting a little warm (but is still responsive over USB and YAT).
I will measure the 3.3V this afternoon
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If you can get the Duet to recognise a SD card, then it's worth replacing the WiFi module. The first step is to get a successful response from sending M21.
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@dc42 So while testing it seems like the 3.3V Regulator died. I measured the voltage on the expansion board ( it indicated 3.2V) and now the yellow LED is not light up.
I can't get a connection via USB anymore -
so I guess my chance are near to zero now?
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The WiFi module may be shorting out the 3.3V rail.