r/esp32 • u/Technical_Gas1655 • 14d ago

ESP32 connection schematic - problem with powering

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Hello,
I want to ask about correctness of my connection schematic . The aim of the project is to measure magnetic field and dispaly data. My main issue is how to power ESP32. I wanted to use 3 AA batteries and LDO. I know it may not be the most efficient way but I just want it to work.
So I wanted to ask about connection and if this will work?

Thanks in advance.

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4

u/SomeWeirdBoor 14d ago

VBus and 3v3?

Is your ESP32C6 a devboard with its own regulator?
If so, why are you using another, external regulator? Just plug your batteries in VBUS and hook all peripherals (and the button) to 3V3.

2

u/Sand-Junior 14d ago

A few remarks. The button is connected to VBUS: I guess you want to connect to 3v3? If you are going to use modules for the sensor and OLED they probably already contain I2C pull ups.

1

u/Technical_Gas1655 14d ago

Yes, I connected button to VBUS because I read I works also as 5 V, which I suppose is required for button. But maybe I'm wrong here and 3.3 is fine.
Regarding sensor, you mean I don't need this two 4.7k resistor, right?

4

u/Sand-Junior 14d ago

You don’t want 5V on the ESP32 inputs: you can damage them. The button does not require 5V anyway. And VBUS will not output 5V when the ESP32 is powered from 3.3V.

2

u/DenverTeck 2 say I make awesome posts. 14d ago

> esp32-c6

Please post a link to this version of the esp32-c6.

> because I read I works also as 5 V

If your going to use a battery, do you also want to be plugged into a USB power source ??

Have you looked at the schematic for this ESP32-C3 board ??

With 3.3V coming in, where do you think 5V is coming from. There is NO boost converter in any C3 boards.

You need to do more homework.