Usually, I have a practice of not connect the Arduino board via USB to PC while the board is under external voltage (like batteries).
But, everywhere I read, it says turn
FYSETC E4 power ON first, then connect to USB.
Will I burn the PC motherboard?
Is the FYSETC power and USB power separate, in this case?
What is this? An Arduino clone? Please post a link, as suggested in the forum guide, which you should have read by now, having been on the forum for ~5 years.
Hi Paul,
"The E4 board is a minimal 3D printer control board based on the ESP32 microcontroller from ESPRESSIF, with built-in Wi-Fi and Bluetooth. The controller speed is up to 240MHz, 16M flash."
This is what I need to do:
https://onstep.groups.io/g/main/wiki/32747
I working on Telescope GoTo system, OnStep And FYSETC-E4 is a easiest way to do that (it have all stepper drivers on one place).
Working with ESP32 in IDE.
Ok.
The advice, on whether it is safe to connect USB at the same time as an external PSU, varies from board to board, based on the design of the power circuitry on each model of board. It can be a problem on Uno but is not a problem on classic Nano, for example.
I'm not familiar with the board you are using, but if you can post it's internal schematic, I'm sure the forum will be able to advise.
Sorry, I thought maybe someone here have this board.
Not connected yet, but I mean connect battery on VIN under screw.
Btw, board not working and no light only on USB, so it seems need external power.
Yes, I was coming to the same conclusion. The 5V line from the USB connector seems to be connected to pin 2 of Header5, but I have not spotted it connected anywhere else (I could have missed something).
So I don't think there's any danger to your PC.
If you wanted to power the board from USB (or at least the ESP32 itself) I think you could connect a jumper between pins 1 & 2 of Header5. But then if you also connect external power, there could be danger to the PC, so don't forget to remove the jumper first.
Ok. Thanks.
Some of jumpers are already in, I will check which, when come home.
And most of spare jumpers I got in box, with some heatsinks for install.
There are pictures of my board.
It seems jumpers are on 24v, 5v, SCL, SDA.
And some from seler's page.
Do I need change something on this jumpers here?
Hi,
you should read through the onstep instructions for this board
https://onstep.groups.io/g/main/wiki/32747
it says to remove all jumpers and wire one new one.
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