It's possible that the MOSFET U9 itself has been damaged by the overvoltage incident.
When MOSFETs get damaged, they can exhibit behaviors like increased heat dissipation. Given that the MOSFET gets significantly hotter on the abused Pi compared to the good one, it's likely that the MOSFET is indeed faulty.
To confirm this, you could try swapping the MOSFET from the good Pi to the abused one and see if the temperature behavior changes. If the MOSFET is the issue, then replacing it should resolve the overheating problem.
If you want to power up 5V appliance from a 12V source, you have to use a 12V to 5V converter like this in between. https://www.pcbway.com/project/sharepro ... 89016.html
When MOSFETs get damaged, they can exhibit behaviors like increased heat dissipation. Given that the MOSFET gets significantly hotter on the abused Pi compared to the good one, it's likely that the MOSFET is indeed faulty.
To confirm this, you could try swapping the MOSFET from the good Pi to the abused one and see if the temperature behavior changes. If the MOSFET is the issue, then replacing it should resolve the overheating problem.
If you want to power up 5V appliance from a 12V source, you have to use a 12V to 5V converter like this in between. https://www.pcbway.com/project/sharepro ... 89016.html
Statistics: Posted by embeddedbarsha — Wed Feb 21, 2024 10:43 am