Joule Thief

[electricme]

@Jeanna,

Caps in the circuits

I am not sure where you mean, but I have definitely seen it on the scope. You put the cap in and all the spikes - well almost all- get turned into nice curves and the thing is all smoothed out. I think this is why they help in some applications, but the voltage goes way way down.

I bet it has to do with the size and its relation to the rest.

jeanna

Capacitors which are placed in any circuit that has spikes in it will smooth the spikes, they are used in all type of power  supplies, Plug packs, internal power supplies.
This is why you carn't see the full spike on the cro, the cap has smoothed it out.

jim

[TheNOP]

you should be connecting the gator clips at the top of the tube (entry) and at the bottom of the tube (exit) doesnt matter inside or out. connecting it in this way with nothing but a wire linking the 2 ends together should do fine for getting the magnet to fall at a normal rate.

i does not work for me.

the more i search on this the more i am comming to the conclusion that there are no potencial change at the 2 ends of the pipe, no matter if a magnet is slowly droping inside or not.

i am assuming this from the homopolar phenomenas.
localy, near the magnet, it should be different.
i have not tested this yet.

the only way i have got measurements values to date are when i cross the pipe at 90 degres.

[stprue]

@all

Novice request!

Could someone kindly post an actuall picture not a schematic of a voltage doubler/tripler?  When using one does the set-up have to come directly off the coil wires or can it be after the bridge rectifier?

[xee2]

This circuit lights fluorescent tube using only one wire. Not very bright but seems brighter than Fuji board and it is using less current than Fuji board.

[Artic_Knight]

i does not work for me.

the more i search on this the more i am comming to the conclusion that there are no potencial change at the 2 ends of the pipe, no matter if a magnet is slowly droping inside or not.

i am assuming this from the homopolar phenomenas.
localy, near the magnet, it should be different.
i have not tested this yet.

the only way i have got measurements values to date are when i cross the pipe at 90 degres.

dunno maybe it was the orientation of the magnetic poles, honestly im moving on.