Search found 3 matches

by cihanalak
Thu Oct 22, 2020 2:13 pm
Forum: Hardware
Topic: ESP32 3.3v Regulated External Power + USB
Replies: 3
Views: 4651

Re: ESP32 3.3v Regulated External Power + USB

Hello, I think i made a solution about +3.3V + USB connection. I made a Normally Close Logic Mosfet switching circuit and connected 3.3v through it. When usb is connected, It gets signal from ESP32 Vin pin and disconnect 3.3v power. When usb is disconnected, Vin signal goes low and circuit connect 3...
by cihanalak
Wed Oct 21, 2020 10:01 pm
Forum: Hardware
Topic: ESP32 3.3v Regulated External Power + USB
Replies: 3
Views: 4651

Re: ESP32 3.3v Regulated External Power + USB

Yeah, i know the result with 5v vin +usb but cannot find a solution with 3.3v +usb. I tried to disconnect 3.3v rail on power regulator but mcu still powered from cp2102.
by cihanalak
Wed Oct 21, 2020 12:18 pm
Forum: Hardware
Topic: ESP32 3.3v Regulated External Power + USB
Replies: 3
Views: 4651

ESP32 3.3v Regulated External Power + USB

Hello friends, I have a question about my project. I have a NodeMCU esp32s v1.1 board. I have to use 3.3v regulated power supply and usb simultaneously. Getting started page of devkitc says that dont use different power sources same time. Will it be a problem? Or if i modify usb cable to data only (...