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Project Notes

#680 Mini Rotary Tool

unboxing and initial review of a cordless Mini Rotary Tool for engraving and model carving.



I found a good deal on a USB Cordless Rotary Tool Kit Woodworking Engraving Pen DIY For Jewelry Metal Glass Mini Wireless Drill -from a seller on aliexpress.

I’ve wanted to try one of these for some time. For those cases where a Dremel, drill or router is just too heavy duty, for example:

  • adding finishing details, cutouts etc for electronic project enclosures
  • for scale model construction

The device arraived pretty much fully charged, so I was able to just slide in an attachment and start engraving. Not powerful, but easy to precisely control, which is perfect for the light and fine work I plan to use it for.


  • Attachment: 2.35mm
  • Clamp Depth: 25mm
  • Speed: 10000-15000-20000rpm
  • Power: 10W
  • Voltage: 3.7V
  • Battery capacity: 380MAH
  • Charge input voltage: 5V 2A


The kit came with a very large number of attachments for engraving, polishing, cutting etc





Credits and References

Project Source on GitHub Project Gallery Return to the LEAP Catalog

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is just my personal collection of projects. Two main themes have emerged in recent years, sometimes combined:

  • electronics - usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting
  • scale modelling - I caught the bug after deciding to build a Harrier during covid to demonstrate an electronic jet engine simulation. Let the fun begin..
To be honest, I haven't quite figured out if these two interests belong in the same GitHub repo or not. But for now - they are all here!

Projects are often inspired by things found wild on the net, or ideas from the many great electronics and scale modelling podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know (or send a PR!). See the individual projects for credits where due.