Joule Thief Circuit

Discussion in 'The Projects Forum' started by Artbuc1, Jan 4, 2016.

  1. Artbuc1

    Thread Starter New Member

    Jan 3, 2016
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    Learned about this is another thread I started about a solar powered light. Can you make a Joule Thief circuit without a ferrite toroid? My control circuit has a chip, capacitor, resistors and an axial inductor. Can the axial inductor perform the same function as a ferrite toroid? Thanks.
     
  2. DickCappels

    Moderator

    Aug 21, 2008
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  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    The axial inductor is no use for a joule thief, it needs a ferrite core to saturate it with the multiple windings,
     
  4. Artbuc1

    Thread Starter New Member

    Jan 3, 2016
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    Thanks. That is what I thought based on the articles I read. The inductor in my circuit must be there to control the amount of current flow to the LED's.
     
  5. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Its based on a buck booster circuit, its probably the pr4403 chip, or a Chinese version, that runs leds from a 0.9 to 1.5V supply.
     
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