ESP32 Forum

I power the ESP32 from its own 5V power supply.

If, whiles connected to the computer the voltage regulator that supplies the ESP32 decides to fail, mine did, and a USB cable is plugged into a computer, as mine was, the source of the voltage, in my case 9V, is directly connected to the source computer USB buss, like mine was.

My solution will be to crowbar the ESP32 supply source, 9V.

Mostly though this is just a bit of info.

idahowalker wrote: ↑

Sun Jan 13, 2019 1:11 pm

...
My solution will be to crowbar the ESP32 supply source, 9V.
...

A powered USB hub will sacrifice itself and protect the PC.

Ray

My solution will be to crowbar the ESP32 supply source, 9V.

What does that mean?

permal wrote: ↑

Mon Jan 14, 2019 9:40 am

My solution will be to crowbar the ESP32 supply source, 9V.

What does that mean?

He/She means to simply short-circuit the 9volt supply !
Not sure I would recommend that since any power source for these chips is going to be able to supply a good amount of current, so who knows what may happen

I'm sure there must be better options eg: re-settable fuse, zener diode etc

Thank you mrburnette for your suggestion. I added in a powered hub.

The crowbar will short the 9V supply causing the fuse to blow and preventing the 9 volts, from a failed voltage regulator, from reaching the ESP32.