3DPrinting

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3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

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founded 1 year ago

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I am trying to do something... Special (lemmy.world)

submitted 1 year ago by Matcraftou@lemmy.world to c/3dprinting@lemmy.world

6 comments fedilink hide all child comments

So someday ago I tried to fit in the "Back Mounted Electronic Box By Teaching Tech" On my Ender3 (OG). Only problems..... 1st: The box would not fit (The tolerances on my printer are awful) so I spent 2hrs sanding down the box. 2nd: The printer would not turn on, it took me a day to realize that I wired the cooling fan BACKWARDS.

My objective in this Project is to gain Cable Management on my printer (Which is now far worse than before btw, will try to fix) and I am running Klipper on a [RASPBERRY PI 3B+] (do you see where I am going?)

So I try to reduce the amount of unnecessary cables AND I WAS WONDERING (Since I saw the fact on a Teaching Tech video) if I could connect the raspberry pi power directly From the motherboard (SKR MINI E3 V2.0) to the PI's gpio to power it.

So my question is:

On what ports should I connect the two (+5V and GND) cables ON THE MOTHERBOARD and THE PI'S GPIO.

If you did not understand something feel free to ask me.

Video link: https://youtu.be/yW9ovo9CHi0?t=320

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[–] RedBauble@sh.itjust.works 9 points 1 year ago

Simply don't. Powering the RPi via the gpio is possible but bypasses all protections (over/reverse voltage, shortcircuit). Do it only if you know for sure that those things won't happen. Otherwise, know that you might kill your pi.

If you still wanna do it, look for ground (gnd) and a +5v rail on the ender 3 board. The here is the rpi gpio pinout, you have to connect gnd to gnd of the board and +5v to the +5v rail on the board.

I guess a good compromise would be to connect the +5v coming from the ender 3 to the proper pads/vias under the microusb cable on the pi, that way you would still have all the protections in place on the pi. But I have never done that, so don't quote me on that.