HOW TO MAKE a JOULE THEIF (CAPACITOR CHARGER)

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Introduction: HOW TO MAKE a JOULE THEIF (CAPACITOR CHARGER)

hi in this instructable i will show you how to make a joule theif.this joule theif can be used to charge capacitors.
I charged a 30v 3300uF cap in 5 minutes.

Step 1: PARTS

PARTS

R1-1K
Q1-D882 or any npn transistor
D1-1n4007 or any diode above 5v
toroid-you will get one from an old cfl
C1-3300uF or any other cap to be charged


Step 2: WIND THE TOROID

wind both wires togather and connect the resistor to the begining of one wire and the ending of the other wire.

Step 3: MAKE THE CIRCUIT

Step 4: FINISHED

TEST IT OUT MINE BURNT AN INFRARED LED.it has a capacitor discharge so led will be illuminated for some time.

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    11 Comments

    Obviously yours is surviving but depending on drive transistor some implementers might consider a protection zener across the output to snub the peak voltage across Vce and protect the transistor?

    It depends on number of turns on the collector emitter coil,higher the turns there higher the voltage.I got about 40 volts

    Can it be used to charge the capacitor enough for a coilgun?

    2 replies

    You can try a joule ringer.It can produce high voltages with
    descent current output

    This is my account i firgit the username and password so im not able to answer ur questions

    What's the current path once you remove the battery?

    Are you sure you don't have the led in parallel with the capacitor?

    I have a capacitor charging while running this thing so if there is no diode the current can flow back

    Very Neat. I have a lot of googling to do now

    Hi, that is good :D. but couse you load is a LED, i think you dont need the diode in output? dont you think?