[Brilliant Idea] Improved spool holder with digital scale
 
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Carlos Echenique
(@carlos-echenique)
Active Member
[Brilliant Idea] Improved spool holder with digital scale

Hi all, I want to combine the good work done in these two projects:
https://www.instructables.com/Digital-Spool-Holder-with-Scale/
and
https://www.printables.com/model/1196950-filament-weight-scale-spool-holder-prusa-core-one

Mods to the originals:

  • powered by routing to the USB-C port in the back and using a splitter so that the Core One Buddy Cam and this would both get juice without having to use a buck converter.
  • I would also modify the display to mount magnetically in the corner and be rotated so that it is visible without having to go around to the right side of the printer.

My CAD skills are weak (I only use TinkerCAD b/c all the rest require an engineering degree to understand) and I am dangerous around electronics (and people) when holding a soldering iron.

Your input (and assistance) is greatly appreciated. If this works as well as the one in the first link, perhaps Prusa Research can adapt it to whatever spool holding solution will be used for the INDX upgrade.

This topic was modified před 11 hours 2 times by Carlos Echenique

Carlos Echenique
ce.photography
Prusa i3 MK2s + Prusa Core One (INDX Coming Soonâ„¢)

Napsal : 08/10/2025 7:10 pm
Carlos Echenique
(@carlos-echenique)
Active Member
Topic starter answered:
RE: [Brilliant Idea] Improved spool holder with digital scale

Upon further research I see that a USB-C splitter is not available off-the-shelf. I will have to figure out some other way to get 5V to the unit.

Carlos Echenique
ce.photography
Prusa i3 MK2s + Prusa Core One (INDX Coming Soonâ„¢)

Napsal : 09/10/2025 4:03 am
hyiger
(@hyiger)
Honorable Member
RE: [Brilliant Idea] Improved spool holder with digital scale

 

Posted by: @carlos-echenique

Upon further research I see that a USB-C splitter is not available off-the-shelf. I will have to figure out some other way to get 5V to the unit.

USB-C is not meant to be split like that. There needs to be power negotiation between the ports. You can use a hub which would probably provide around 7W per port. If you need power why not tap the 24VDC from the power supply and run it through a simple buck converter? 

Napsal : 09/10/2025 5:42 am
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