How is the short circuit on Raspberry Pi 3 Model B boards?

Question

Raspberry Pi

I couldn't find a good answer to this question anywhere. On Arduino, I know there is such protection, if the pins are turned off, then the board simply turns off, and after elimination everything is ok. But here I don’t want to test it experimentally, but it’s desirable to know. On earlier versions, there was no such protection, but they said that it was planned.
I would like to know what with full protection, from different types of short circuits? And also what measures would you advise when working with Raspberry Pi?
Upd. I also read about self-healing fuses, but everything is written as it is not clear, muddy. Like some kind of garbage that is torn and then it MIGHT be restored after a while ... Can anyone tell me more?

Answer 1

There is no protection here or there. Shorted pins are also not good for the Arduino. Exceeding the current of 40mA can damage the pin, and the fuse will not work immediately and at a much higher current. In raspberries, the maximum pin current is most likely even lower. Install buffers and current limiting resistors if there is a possibility of short circuits.
A resettable fuse is such a thermistor with a very steep characteristic. From excess current, it heats up and (almost) opens the circuit until it cools down. Reliability is not high, response time is long. IMHO it will save you from a fire, but it is better not to allow it to work, the microcontroller is not guaranteed to be saved.

Answer 2

Both on the Arduino and on the Raspberry Pi, each pin has its own purpose and can be in certain states. Depending on this, the result of "shorting" will be completely different.