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Make:SF South - Night Joule Thief (Feb 25th) - at TechShop San Jose

Hello Makers,

We are back to electronics this month with the Night Joule Thief

This kit allows you to use a "dead" battery that you would normally have to throw away to light LEDs. As you would expect by the name it uses Joule Thief circuit to extract the energy that you are not able to use in standard electronics. It uses some very interesting tricks to accomplish this. This kit also includes a light sensor so it automatically turns off during the day and lasts even longer. We will go through the basics of how the circuit works and then solder it together. Bring some old batteries if you have them. The cost of the workshop will be $20.

And, we want to see the cool stuff you all are doing! So email us if you have something you want to show off and we will arrange a demo.   

See you there!    
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A fun-for-all-ages event. Children under 14 need to be accompanied by an adult.

See you soon!    
- The Make:SF Team

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Thanks for joining our group! Keep us going strong by chipping in! Pay your June-Dec 2013 dues online today!    
http://www.Meetup.com/makesf/dues/    
You can also pay cash or credit card in person at the meeting.




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  • A former member
    A former member

    Big thanks Malcolm and Elise for putting this together. It was a fun project to build and interesting to learn the theory about how the circuit works.

    February 26, 2014

  • A former member
    A former member

    Will any size batteries do, or is there a minimum? A maximum? AAA, AA, C, D, 9V, 12V....? Does the type matter -- lead-acid, lithium-ion, nickel-cadmium? Initial capacity -- will a dead truck batter do as well as a dead flashlight battery?

    February 19, 2014

    • Elise

      Uses a AA battery

      February 24, 2014

  • A former member
    A former member

    Do we just show up with $20? What else do we need to bring?

    February 24, 2014

    • Elise

      Yep, just show up with the $20

      February 24, 2014

13 went

  • Elise
    South Bay Leader, Assistant Organizer,
    Event Host
  • A former member
  • A former member
  • A former member
  • A former member
  • A former member
  • A former member
  • A former member
  • A former member
    +1 guest
  • A former member
  • A former member
    +1 guest

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