Joule Lamp

[NerzhDishual]

Hi Lynx Lampistes, Physics Profs, Joule Robbers, NRG Hunters, Witty Experimenters,
Skeptics, Trolls and my Sister in Law (for ex.)

Sorry for disturbing.

With my (near botched) Lynx Joule Lamp, I'm not (still?) able to run any of these led bulbs.
Just bl' blinkings observed. I'm not interested in these deadly CFLs (and vaccines, BTW)

I have made another primary coil (I mean: the one with less turns) with about twice more turns.
Now I'm drawing about 100 ma (under 12 volts). (VS about 400 ma with my previous primary coil).
I'm definitely more confident with my small fluorescents tubes.

I have noticed that the brightness of these tubes seems not depending upon their
"Watts" but upon their Lenghts!

4 Watts: length 136 mm
6 Watts: length 212 mm
8 Watts: length 288 mm
(Diameter 16 mm)
My 'secondary' coil length is about 230 mm.

A 8 watts bulb 'looks' more efficient than a 6 watts one.
These 4 watts tubes are definitely useless as they refuse to give obvious lights!

IMO, this fluorescent tube just act as a kinda antenna.
It also likes (= needs)  to be placed parallel to the coils.
BTW: I use only one wire.
You add another fluorescent tube. You do not not draw much amp.
It also seems that you gain some more luxs.
Now! using any 'light box' (= a kinda Faraday cage) could be not so evident. But might be done.

In the same vein, and In My Poor Bloody Froggy Opinion (IMYPOBLOFO), trying to measure
-if it is the case-  and -as far as I can catch it- any output of such a LJL device with calorimetry
seems not so appropriate.

Gwella gourhemennou a-berz Jean.

[PhiChaser]

PhiChaser,

I know what you are getting at, that the diameters don't make sense.  Vinyl coated PVC insulated primary wire of 14 awg stranded copper wire is about 0.125" Diameter (depends on manufacturer).  20 awg magnet wire is 0.0319" diameter.  Its is difficult if not impractical to have the wires perfectly next to each other when winding.  If it were possible then for a nine inch length we would have 75 turns primary and 281 turns secondary (843 total).  Its better to shoot for 73-75 turns primary and 258 secondary (774 total).  This gives roughly the 10.6:1 turns ratio. 
So if changes in the size aircoil are made using different wire sizes, its best to calculate based on wire diameters.

My large aircore uses 18 awg secondary and 12 awg insulated stranded primary.  120:1200 turns.

My point was that the actual wire diameter IS doubled, which is what you said there at the end; It DOES make sense. You should end up with similar ratios using 30AWG magnet wire and 24AWG WITH insulation (like category wire). A smaller version of your current build is what I'm thinking... Pipe size would have to be scaled down as well (IMO, maybe 3/4"pvc?) but I'm a noob at this so??
I totally understand that you can't get even wraps, it just seems like to me like it would scale down nicely... Maybe a 1.5v to 12v coil? That could be handy! Cat wire can be pretty unpredictable as far as insulation thickness goes (and how much tension you use winding with it heh heh).
Happy experimenting,
PC

[Lynxsteam]

That's interesting and quite by accident that the copper portion of the wire diameter is double. 

I am attaching a drawing that might help some of you convert your LJL to this newer version.  Hopefully you can unwind the secondary onto a spool, reconfigure and try this latest setup.  You don't need the PVC end caps, nor do you need the switches.  Basically its just the coil tube and wiring to the transistor and LED bulbs.  This circuit design will light LED bulbs very brightly, or you can dim them at 50% power.

Hopefully someone will try this on bamboo for a cool tropical look!  Sort of a Gilligan version.

[ehsanco1962]

Hi LYnxsteam

Thank you for shearing your interesting video and schematic  ,interesting setup you have on the final one the small
Version, the  large  version need expensive wire (12#AWG)but this one is cool  but I have a couple question :
First I couldn't find PVC with same diameter can I use a little bit larger diameter .
Second we don't use in Europe 120v so all the LEDs we have are 220v will these LEDs work with this circuit .

Thank you in advance

Ehsan

[JouleSeeker]

Hi LYnxsteam

Thank you for shearing your interesting video and schematic  ,interesting setup you have on the final one the small
Version, the  large  version need expensive wire (12#AWG)but this one is cool  but I have a couple question :
First I couldn't find PVC with same diameter can I use a little bit larger diameter .
Second we don't use in Europe 120v so all the LEDs we have are 220v will these LEDs work with this circuit .

Thank you in advance

Ehsan

Ehsan -- the bulbs I'm using here with Lynxsteam's build are actually 220V LED bulbs!  and they work just fine, better than any 120V LED bulb I've tried in fact. 
The particular bulbs I'm using most -- not that you should necessarily use the same bulbs -- are these (shown below).

Also, "First I couldn't find PVC with same diameter can I use a little bit larger diameter ."  That should not make much difference IMHO.