Flyback Driver/ Joule Thief

About: I like doing random electronics high voltage projects

Intro: Flyback Driver/ Joule Thief

here is a circuit diagram

Step 1: Parts

you need a npn transistor a resistor and a toroidal transformer and capacitor is optional

Step 2: Asembley

assemble the circuit from the diagram

Step 3: Done

hope you are happy with circuit

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    6 Discussions

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    TP_inc

    4 years ago

    http://www.circuit-diagram.org/ From now on you should use this to make your circuits

    1 reply
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    dillonxti

    4 years ago

    any capacitor will work except electrolytic type

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    dillonxti

    4 years ago

    I am using a mkp capacitor any size will work under 1uf

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    rborsuk

    4 years ago

    Hi,
    Some quick things:
    1. What turns ratio did you use?
    2. What is the NPN transistor you used?
    3. How are you using this circuit?
    4. The toroidal transformer came from what?
    Any additional information you can provide would be helpful.
    Thank you for the instructable.
    Rob

    1 reply
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    rborsukrborsuk

    Reply 4 years ago

    Also looks like you have a capacitor in the circuit, what size and type?

    Thanks,
    Rob