Is joule thief circuit gets overunity?

[conradelektro]

@TinselKoala:
I watched your latest videos (e.g. http://www.youtube.com/watch?v=nqJPi35cRrE ) and I remember the following test results:

A Joule Thief starts to oscillate easily in case one uses a high inductanc coil (e.g. a Ferrite toroid). With a high inductance coil one also gets away with many different ratios between primary and secondary (1:1 ratio will always work, higher ratios give higer output Voltage).

It all becomes much more sensitive with a low inductance coil (e.g. air coil). First of all the ratio between primary and secondary starts to matter. And also the power supply voltage becomes an issue. Power supply voltages higher than 8 Volt cause problems (the transistor starts to burn). Careful pulse shaping at the base (capacitor and diode from base to ground) allows higher supply voltages up to 24 Volt.

So, hight inductance coil, one gets away with a lot of the parameters, things are easy.

Low inductance coil, one has to be careful with the ratio between primary and secondary and with the pulse at the base when using a high supply voltage. The low inductance coil is interesting because it allows high frequency operation in the MHz, which seems to lower power consumption.

Greetings, Conrad

[ltseung888]

http://www.overunityresearch.com/index.php?topic=1617.msg27510#msg27510
I am building many prototypes that showed overunity with the two Atten Oscilloscopes.  The difference with the standard JT is the addition of a proper capacitor in parallel with the Power Supply.  If a super capacitor such as 2.3V 10F were used, the LED would remain ON for many minutes.  The frequency would change and some peaks would be observed on the oscilloscope.
The above link will have the details.  You are welcome to replicate and have guaranteed overunity devices.

[TinselKoala]

Well, Lawrence, what can I say. Your work always amazes me.

This present set of photos actually makes my teeth hurt, they are so sweet. It reminds me of the very first electronic circuits I ever built.... when I was nine years old.

Since you have so many overunity versions of your Joule Thief, I'm sure you will soon be showing us one of them, running only from the output of another one of them, which in turn is run from the output of the first one.

If you can't get a 2-unit series loop arrangement to work, then you may need to put several more JTs in series to achieve the desired self-looped effect. I think four or five in series should be enough to show something of interest, but you might need ten or more, depending on various factors. At least we know you have all the parts necessary to do this testing.

Please keep us posted on your inspiring work.

[TinselKoala]

Yes, Lawrence, your work is an inspiration to me.

When I saw your photos above, I knew what my morning project would be. So here it is.

Figure captions:
1. Layout for the PCB, drawing the layout on the copper cladding with the resist pen
2. Preparing to etch with Ferric Chloride
3. Etching partially complete
4. Rinsing after 20 minutes in etching solution
5. Clean of resist using acetone
6. Drilling holes for component leads
7. Inspecting, verifying layout
8. Soldering components to the board
9. Initial testing
10. The backside of the completed circuit board
11. Final product, brilliant LED using a depleted LR44 button cell

[TinselKoala]

There may be some problem loading some of those images -- so I put them all together into a short video with a voiceover narration.

http://www.youtube.com/watch?v=CFEr4o3sp7U