Instructables
Picture of 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.
 
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Step 1: PARTS

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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

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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

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Step 4: FINISHED

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TEST IT OUT MINE BURNT AN INFRARED LED.it has a capacitor discharge so led will be illuminated for some time.
dudes7 months ago
What is the output voltage?
electro techster 111 (author) 10 months ago
I have a capacitor charging while running this thing so if there is no diode the current can flow back
rasha yellow10 months ago
Very Neat. I have a lot of googling to do now
Eternal6610 months ago
Hi, that is good :D. but couse you load is a LED, i think you dont need the diode in output? dont you think?