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Raspi died middle voyage - Printable Version

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+--- Thread: Raspi died middle voyage (/showthread.php?tid=5264)

Pages: 1 2

RE: Raspi died middle voyage - Adrian - 2024-03-22

(2024-03-21, 06:32 PM)Sully Wrote: Do you think if I connected the 12V SW in the CAN socket (which is externally identical) I would have fried the raspi?

Interesting thought. I assumed that the CAN driver can withstand 12V as the recommended ESD protection diodes have a working voltage of 24V. And the datasheet of the MCP2562 lists +/- 58V as absolute maximum on the CANH/CANL pins.

But I will have to try that on a sacrificial MacArthur prototype.

RE: Raspi died middle voyage - Adrian - 2024-03-23

Can you take a close look at two parts on your MacArthur HAT?

  1. U3 CAN Driver: Do you see a small crater or an area that's bubbled up?
  2. D22 ESD protection diode: Is the part damaged?

The attached images are from a MacArthur prototype where 12V was accidentally plugged into the 1-Wire connector.
   
   

We tried to prevent that mistake by having a different color for the power connector and plug, but I can see how that can still happen by accident. Maybe we should migrate to a different type for power that doesn't fit into the other connectors.

RE: Raspi died middle voyage - Sully - 2024-04-05

(2024-03-23, 12:36 AM)Adrian Wrote: Can you take a close look at two parts on your MacArthur HAT?

  1. U3 CAN Driver: Do you see a small crater or an area that's bubbled up?
  2. D22 ESD protection diode: Is the part damaged?

The attached images are from a MacArthur prototype where 12V was accidentally plugged into the 1-Wire connector.



We tried to prevent that mistake by having a different color for the power connector and plug, but I can see how that can still happen by accident. Maybe we should migrate to a different type for power that doesn't fit into the other connectors.

Hi Adrian.

Thank you for your response. I don't see any of those effects on the HAT. In fact, I bought another rpi5 and it works perfectly fine with the HAT. So maybe it doesn't have anything to do with the first rpi death?

I don't really know what happened.

Thank you.