Joule Thief

[electricme]

@Jeanna,

***********************
I put all the pickup wires from the MK2 in series, and ran them through this bridge into a cap.
**********************
Try soldering a diode to the end of each output before you parallel all the ends up together.
Sometimes the voltage could go back inside the torid and cancel out the rest of the output.
Any backfeed to the torrid will be seen as 180 degrees out of phase, which will cancel out any output.

Jim

@all

I downloaded a copy of TinyCAD, and have been having a fiddle with it, does anyone know how to change a DSN file to a JPG or Giff file so I can post my efforts here?

The PUPPY is having a siesta on its CD.........................all is not as it seems, I burnt the iso, BUT BURNT IT WRONG OOOOOOH
ha ha.

jim


@ist
Resonance ISSSSS the key my friend. lol
Filling a single LARGE cap defeats the purpose, filling smaller caps in parallel and discharging them together works faster.
When I get my circuit up on here it will explain itself.

jim
 
@Bill,
I also are struggling in this forum, don't feel you arn't on your own mate, some of the stuff (maths) is way over my head also.


jim

[Koen1]

@electrime: it is interesting that you mention cap sizes and charge/discharge speed.
I have been pondering this for a while, and although my conclusions seem to accord with
standard capacitor theory I still feel like there is something missing, yet I can't pinpoint it.

Basically, a low Farad cap, let's just for the sake of argument say we use a 10uF cap of 10V,
will charge up to the potential of 10V much faster than a 10F cap of 10V will, simply because
the total amount of electrons that is needed to "fill" the cap is 100 times smaller.
This leads to a much shorter charging time given a fixed amperage feed, and so the smaller cap
delivers 10V of potential at 1/100th the amperage, approximately 100 times more often
than the large 10F cap will.
The total energy should still be equal, and possibly even somewhat higher on the larger cap,
since a high Farad count usually also means a better dielectric and less leakage current in the cap.

My question is, although it would seem that smaller caps charge and discharge faster and more often,
they also yield less energy, so which would actually be better to use?
Yes, a high Farad cap takes much longer to reach the same voltage, but at the same time it can
store more actual electrons... And we all know that volts are not energy, so how usefull is it really
to go for high volts at nearly zero amps, thus also very few actual coulombs? If in the end the output
depends on the number of coulombs per second per volt, then sure you can more easily "collect"
a voltage on low Farad caps, but the actual energy you "collect" is proportionally small. And in theory,
collecting more coulombs at lower volts should amount to equal energy output...
So is it really very usefull to collect high volts at very low amps, or could we just as well collect
high amps at very low volts, energy-wise?


@IST: I fail to see what angels have to do with Tesla Shields... Can you explain?

Regards,
Koen

[Thaelin]

    On saving your drawing to a jpg, just  do a shift/printscrn. That makes a copy of the whole screen.
Then bring up paint, click edit, paste and you have the image on the paint screen. Click file, saveas
but before you save, at the bottom check the file type and change to jpg. Bingo you now have it. If you
want to crop it before saving you can get rid of all the excess border stuff.

thaelin

[electricme]

@Koen
I think you meant to say 10uF 10v cap compared to a 10uf 100volt cap.

Yes, I have been browsing my mind with this for some time now, how to get amps/grunt out of this circuit.
It is like putting 20 x 12v DC car batteries in parallel, to get 440amp hrs.

I don't have enough parts to make up a parallel triggering circuit, but in my mind I can visualise it, what I mean, I can actually see it, weird.
I believe I could do this 2 ways.
Use 1 big torid or use 20 smaller torrids
Use 1 transistor or 20 seperate transistors (Mosfets)

If twenty 10uf x 5.6v capacitors are paralleled up, their outputs can be trigered to fire together, making a 20 times power output.
The trick is to fill each capacitor in turn, so the fill time is important as well as the capatance.

Some circuits of the JT will be able to do this in 1 second, others would take a little longer.

I believe a 555 timer or a DOT/BAR IC chip could fulfill this role, then just adjust the time of fill (watching a DMM to do this) with a T pot, then the next cap is filled and so on.
I bought a LED chaser kitt and built it just to get a better idea on what I should do, it has been on test for over a month on the verrandah.

Anyway when I get to making and saving the circuit it will become apparent.

@Thaelin,
Thankyou for the fix I needed to convert a DSN file to a JPG file
It looks a little complicated, but I will tackle it tomorrow as its midnight here.
Im off to retire.

My thanks to everyones help.

jim

[Mk1]

@jeanna

First thing first, if you cant get reading from coils in series then there not connected right , you need to connect them good first , i also want to make sure that your 2 coils in series are made from one coil on each side.

The reason i ask for dc voltage reading is to know if your coil are connected properly , there are not 6 ends but 4 the middle is connected to other coils. remember when connecting 3 coil together there are 4 way to connect not 2.

Only then will we talk about the bridge.

Mark