Joule Thief Flashlight Kit


  • Flashlight that runs on DEAD batteries
  • Print your choice of 3 case styles:  Tactical, Standard, or Minecraft Torch!

15 in stock

SKU: UCAGB Category:


A Maker classic, the “Joule Thief” circuit gives your dead AA batteries new life.  This kit will provide you with everything you need to give those dead batteries a second life powering a 3D printed flashlight.   Choose from 3 styles (basic, tactical, and minecraft torch are available).  Download the chosen 3D models, print them on your 3D printer, and assemble.  The provided kit includes a professionally made PCB with through-hole components for easy soldering.  Some beginner level soldering skills are required.  Enjoy!

Support & Documentation Current

Retired Version (PYSGB) Documentation

Retired Beta Version Documentation

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Additional information

Weight .0625 lbs
Dimensions 7 × 4 × .25 in


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