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.

Comments

[Ratty Bunyip]

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?

[dudes]

What is the output voltage?

[electro techster]

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

[DarkModo09]

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

[electro techster]

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

[electro techster]

No.Its output current is very low

[electro techster]

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

[RicksterInstructables]

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

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

[electro techster 111]

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

[rasha yellow]

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