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A $50 spinning wheel that makes spinning fiber into yarn easy. It is great for beginners or people who want a small spinning wheel.
A $50 spinning wheel that makes spinning fiber into yarn easy. It is great for beginners or people who want a small spinning wheel.
1,057 backers pledged $85,353 to help bring this project to life.

Battery Power and Printing Bobbins

Posted by Maurice Ribble (Creator)

I created another video for everyone this week.  This video covers options on how to make the EEW Mini truly travel friendly by powering it with a battery.

Some important reminders from the video are that the power plug on the Mini is 5.5mm x 2.1mm.  In the video I showed this 9V battery plug, the XT Power Pack, and this inverter.

I'm also really happy to announce that I'm giving away the 3d files needed to print your own bobbins for the EEW Mini.  If you (or a friend) have a 3d printer then you can use these files to make your own bobbins for the Mini.  On my 3d printer making one bobbin took about 2 hours.  I hope people find them useful.  While these are functional, if anyone out there wants to make a prettier bobbin feel free to send me an updated 3d file and I can share it with the community in future updates.

3d Render of a Bobbin
3d Render of a Bobbin

I'm starting to talk with my part suppliers in an attempt to finalize as many of the parts early as I can.  This should help get production of the Mini started early, which will be important since I want to try and ship to all my backers by the June timeframe.  One note about how shipping works.  I will be asking for people's mailing addresses via a survey just before I start shipping.  This will help reduce the number of people who have an address change before I ship the Mini to them.  Then I will ship to backers in the order people backed this project.  So if you're an early backer you should be receiving your Mini before June.  I don't yet have a more accurate estimate on shipping dates for backers.

Thanks for all your support!

Leena Boswell, Lisa O'Day, and 43 more people like this update.


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    1. Maurice Ribble 5-time creator on

      The 5.5x2.1mm plug was for the prototype EEW Mini. The final one uses a 5.5x2.5mm plug. Check out this page for more info:

    2. Maurice Ribble 5-time creator on

      Robbin, yes that cable works. I've actually tested that exact cable and it's my favorite solution these days. If you look in the description of the youtube page I actually have had a link to that cable for awhile. I would have updated this kickstarter page with additional info, but you can't update these kickstarter pages.

    3. Missing avatar


      Thanks for making the bobbin files available. On the power supply - do you think a USB to 9V step-up converter would work to adapt the 9V input to the more common USB power bank configurations? The one I was thinking of was this -…

    4. Missing avatar

      Ashley Casteel on

      Regarding where to print bobbins, many local library systems have started purchasing 3-D printers that are free or very low cost for the public to use. If anyone's interested in having bobbins printed, definitely start calling libraries to find out if any in your area offer this service. My local libraries for instance allows the public to use their 3D printer machines for free if you provide your own plastic filament or charge a few dollars per hour to print something using whatever colors they have on hand.

    5. Maurice Ribble 5-time creator on

      Please note that the 5.5mm x 2.1mm plug information in this post is out of date. I switched to a 5.5mm x 2.5mm jack to make the connection to the power supply better on the final PCB. The 9v connector above won't work. You'll need to get one with a 5.5x2.5mm jack instead.

    6. Maurice Ribble 5-time creator on

      Halley, I probably won't be designing a lazy kate for these bobbins. I don't think enough people would be interested. If you search the internet for "diy lazy kate" you'll find lots of ways to make your own lazy kate.

      Linda, there are places you can hire to do 3d prints, but it will be expensive. If it was cheap enough I'd just make the mini bobbins this way, but it just takes too long to 3d print which makes it expensive. One place you can do 3d prints is and I checked their prices for an EEW Mini bobbin. It would be $24 plus shipping for one bobbin.

    7. Missing avatar

      Linda Haimann Feldman on

      Are there places to print 3D bobbins out there? Is it costly to do it? It’s exciting to read about the latest news.

    8. Halley Orion on

      Thank you SOOOO much for the 3D printer files!

      Do you think you might design a lazy kate for these smaller bobbins, like you did for the regular sized ones?

    9. Maurice Ribble 5-time creator on

      Evanita, these were designed in Fusion 360. If you would like some other file format besides stl let me know.

    10. Evanita W Montalvo on

      I was actually planning on designing 3d printed bobbins so this is a good starting point for me! :)

    11. Maurice Ribble 5-time creator on

      Lisa, these bobbins are a different size from the full-sized EEW. The Mini bobbins are much smaller.

    12. Lisa Ferron on

      Are the bobbins the same as the full-sized EEW? Trying to determine my need for additional bobbins :)

    13. Maurice Ribble 5-time creator on

      Ashley, I'm very interested to hear how it turns out. Please post about your experiences.

    14. Missing avatar

      Ashley Casteel on

      Thanks so much for the 3D bobbin file! I don't have access to an especially high-quality 3D printer (just the Cube models at my local library), but it will be interesting to experiment and see if I can manage to make my own bobbin in a fun color : )