esp-wroom-32 - Board for(Laser, Autopen, 3 Axis cnc)

Hi All

Been working on a board for the 38 pin (esp-wroom-32).
The firmware I am using is GRBL_ESP32
I would like to know your option.

Here is a picture of the board

I have only set the endstop pins and the pwm pin left all other pins to be set as needed.
Pins P34, P35, P36, P39 are inputs only I put pull up jumpers in for this 4 pins.

What needs to be changed or added?

Thank You

Edited 1 time(s). Last edit at 10/13/2019 09:23AM by oldtimmer.

Picture of version 1 of the board that I use on my DIY 5W Laser



On this board I had to add wires and plug for the 12V for the Laser module.
On the new board I added a 2 pin header (GND-12V) for the Laser module.

I had to make an adapter to plug the Laser ttl to the board.
On the new board I added a 2 pin header (GND-PWM) for the TTL.

Sence I was not using any of the other I/O pins I figured I would leave them open.

Edited 1 time(s). Last edit at 10/13/2019 12:48PM by oldtimmer.

What are your thoughts on using a full wave bridge as a protection circuit?
That way you can use 12AC/DC + or - jacket.

Hi all
Well finally got the revised boards in.
I guess this boards would be considered a shield for the (KeeYees ESP32 or equivalent).



Bare board JLCPCB seems to do a nice job making pcb boards



Still working with the reflow oven some components moved on me had to use the iron to reposition them.



Burned my fingers putting the headers on but in the end it was worth it.



After testing for shorts and my 5V regulator was working.
I plugged in the KeeYees ESP32 and no smoke lol.
Then plugged the 3 DRV8825's in and no smoke again yeha lol.
So I plugged in the end stop's, Stepper motors and the laser and everything works.
Had to put a heat sink on the 5v regulator it was running worm.
Now to 3D print me a mount for the board.

Please let me know what you think good or bad.

Thank You all

I have 2 tested boards (Tested on a DIY 5W Laser Not tested on autopen or CNC)
If someone has an autopen or 3 axis CNC and would like to test 1 of this boards let me know.

Thank You