I have powered Wemos Lolin 32 ESP32 board via power supply (not USB) with 3,3V. I understand USB power input would be 5V, but on power input (which is separate connector) I need to supply 3,3V. Here is my board:
https://wiki.wemos.cc/products:lolin32:lolin32
Question, is it possible to use 5V connector (left side second bottom one, next to GND) to get 5V out which I need to power relays? There is 5V connector on this board, however it does not provide 5V in my case. Should I enable it via micropython command? Or is it only available if board is powered via USB 5V input?
I have 5V relays ant those work only sometimes when powered with 3,3V, so need to find another solution.
power supply options with output 5V
Re: power supply options with output 5V
Yeah that 5V pin is likely just connected to the USB voltage. The board very likely won't have an internal way to generate 5V from 3.3V.
A tiny boost converter is pretty easy to get. Adafruit have them as modules for powering USB devices from lipo batteries.
A tiny boost converter is pretty easy to get. Adafruit have them as modules for powering USB devices from lipo batteries.
Re: power supply options with output 5V
Can I power ESP32 via that 5V pin instead of using 3.7V power connector socket? This would be simpler solution in my project if it is possible. As I am already using down converter from 12V down to 3.7 to feed ESP32. So instead of adding boost converted in order to get 5V, I could instead adjust 12V down to 5V and feed ESP32 via 5V pin as well as have 5V for my relay?
Re: power supply options with output 5V
Looking at https://wiki.wemos.cc/_media/products:l ... v1.0.0.pdf that looks fine.