hsn6827

That is the full circuit, v+ is your 3.3v protected output.

Thank you very much @xxxajk . But if you have full circuit, could you share it please? I could not understand that how i can place this diagram to my circiut.

Sure, here's one. NOTES: SCR trip voltage is 400mV, you may need to adjust R1 to a lower value to decrease sensitivity. volts D1 R1 trips at 3.3v 1N5333 60K 3.49V 5.0v 1N5228 60K 6.09V

Yes, if you have an example, could you share it with me please?

Thank you very much for your very beneficial advices @xxxajk . They are very important tips. I have added some of them like using diodes to prevent reverse polarity troubles. But I will add fuse and crowbar circuit to circuit to increase...

Tips for a bulletproof setup: Use a poly fuse at least for low current applications, or a miniature circuit breaker for more demanding amps. When dealing with higher voltages than the MCU, the safest thing to do is use optical isolation. Both...

Thank you for your suggestion and advice. As you mentioned or estimated in your post, yes I didn't use connector to connect my servos to power supply. It was possible risk for short circuit. Thus it happened. Ok. No need to spend time for...

That is pretty close to zero. If you didn't know what went wrong, and especially if the problem had appeared right after soldering pins or doing some other mechanical work where stray metal may have been placed on the circuit board, I would have...

Thank you very much Paul. When I measure the 3V-GND pins DC voltage, I saw that 0.08 V. It is almostly closer to 0 VDC. So do you have any comment about it?

That part is the voltage regulator. It gets burning hot when another part of the board is shorted (from 3.3V to GND), because the rest of the board is trying to consume nearly limitless current and the regulator tries to work as hard as it can...

Hello everybody, I have a problem with my Teensy 4.1 board. Today, while i was trying some codes with RC servos, one analog signal wire was touched to servo's GND or +12V mistakenly and caused short circuit. Now, my teensy board does not run...