I have a doubt. my ESP32 development board has a V5 pin. Is this the Vin pin?
Is this pin connected to the voltage regulator (AMS1117)?
I don’t know if I could apply 9 or 12 volts in that pin.
Thank you so much for your site. It’s very useful.
If you look at the circuit diagrams of the ESP32 Core Board and the ESP WROVER you see that they use the ncp1117 voltage regulator. The datasheet of the ncp1117 shows max input voltage of 20V.
You would have to make sure that the USB port is not connected as the EXT_5V is connected to the input voltage pin. Also check the data sheet for thermal characteristics to see if you need a heatsink on the ncp1117.
Also, from the circuit diagram, pin 19 of J2 is where you would supply EXT_5V.