Joule Thief

[electricme]

@all
I had a virus attack, theis 1st April thing, so until I get this sorted out, I will be off air awhile.

Im on someone elses PC in another town, so I carnt read posts.

Got to download AV tools and copy to my PC.

What happened, PC got slower and slower, rebooted a few times, eventially lost email as well.
2 little screens on my tool bar wink, but as soon as I get to any web sites, I get a DOS attack.

I screened for this 1 April, but it didnt show up, hmmm we will see.

@Groundloop
Got your PM, thanks, I will be in touch ASAP with you.

jim

BTW mice = 32

[WilbyInebriated]

grizzly snuff is giving away little led flashlights with a can of chew. these flashlights have a little canister in them the size of an AA battery that holds 3 little button cells instead. these little canisters work excellent to add a joule thief to, and a great way to 'plug n play' a jt circuit into about anything that can take a AA battery. i can take some pictures if anyone wants.

-edit: this is NOT an advertisement for grizzly chew. i don't work for them, and i don't care what you put in your own body. i just wanted to let people know about them.

[Pirate88179]

Wilby:

Good to see your post.  Yes, please post pics of this conversion as I am in the process of converting a few of my led 3 AAA lights to a JT and a single AA like Ist and Gadgetmall did.  It would be worth buying the chew to get that light.  I am also trying to quit smoking and used to chew so maybe this is the time.  Thanks.

Bill

[Koen1]

Not sure if it matters to anyone, but I was in Walmart today and I saw these new solar LED units that use a single 3.2 volt rechargeable lipo AA instead of the normal 1.2 volt AA cells for greater brightness. The batteries are the same AA size cells, but almost triple the voltage. They are selling spare 3.2v lipo batteries in 4 packs for about $10. Might be worthwhile for anyone needing a higher cell voltage in a smaller package. These cells put out the same voltage as 2 alkaline AA's when fully charged.

Yeah, I also noticed there seem to be a few non-standard batteries on the marker nowadays... I haven't seen thses AA-sized 3.2V ones yet,
but I have seen 3.5V ones of a diameter somewhat larger than normal AAs and a length slightly smaller, their size is almost the same as
those Lithium batteries they have been selling for use in camera's for several years... But they are less expensive and have a lower voltage...
Still, interesting to see other types of battery being sold.

As for LEDs, I read an interesting article in the newspaper today.
The Dutch office of Measurements (loose translation of the name) has recently tested 5 different LED lamps for 2 claims;
LED lamps are claimed to be even more economic than energy-saver lamps by 25%, and are claimed to produce an equal
amount of light, if not more.
None of the 5 major brands of LED lamps passed the tests. None of them were, in the end, actually 25% more economic
than energy-saver lamps while at the same time produceing equal or greater amounts of light. Some did produce comparable
levels of lighting, but were not more energy efficient than energy-saving CFLs, some were more energy efficient but
clearly did not produce equivalent levels of lighting.
Another test involved actual user experiences with LED street lighting, where they had replaced all lamps in lamp posts
with LED lamps in a (couple of) city block(s). After a certain period, the residents were asked for their opinions on the
new LED steet lighting, and they said that the LED street lights spread much less light over the direct surroundings of
the lamp posts, causing a fairly well illuminated area in the direct vacinity of the lamp post, but the area a little further
away from the lamp posts was a lot darker than used to be the case with the old lighting, and this caused a great
contrast between light and dark zones located close to and further away from the lamp posts, respectively.
This, the residents indicated, did not increase their feeling of security nor did it make things very easy to see:
where before you could easily see a car or bike approach over a fully illuminated road, now you would see a car
or bike approach through a series of light spots and darker areas. Of course the cars etc still have their headlights,
but that's not the point.
Anyway, some further tests are planned, but if these confirm the complaints from residents, it will probably be
advised not to implement LEDs as street lighting just yet.
Thoughts on this, anyone?

I also found an article about a new chip size solar cell for micro electronics that can produce 4 volts at 50 and 100 micro amps and 8 volts at 25 and 50 micro amps.

Interesting article.
I found such chips for sale at www.budgetronics.com quite a while ago. They sell em for 1.95 Euros each, max output 4V 50uA.
Although perhaps their 5.95 Euro 4.5V 50mA cells are more interesting? They're quite small too, 6cmx6cmx3mm... Ok, not nearly as tinyas those chips,
but then again their amperage is a lot higher...

kind regards,
Koen

[nievesoliveras]

@nievesoliveras,

I think we're thinking along the same lines - but I don't know why we should need a motor / generator...  The idea is to have a switching mechanism which somehow stores and dumps current from one side of the circuit to another, yet does so while simultaneously creating more ...or, should I say, a higher energy to dump into the charge battery.

This could be done with a collapsing magnetic field, the collapse of the flux could generate a more powerful volt/amp pulse than source.  Proving this and building around it is the problem.

The point is that if we could get the Jule thief circuit to self run with the automatic switching of two batteries, then we have the 1.5v power supply problem solved.
This circuit is used as a power source for any project, in my case is a pulse motor.

Jesus