Joule Thief (Calculator Solar Cell) 018

[acmefixer1]

you want to when you can buy a 3 dollar (US) solar garden light that does the same thing?

[acmefixer1]

The mistake many poeople make is thinking that adding the Joule Thief (or any other power dissipating circuit) is going to "make it more efficient." The typical conventional JouleThief is about 50% efficient, which means half the power is wasted in the JT. You are better off using the simple and less power wasting circuit that you have in the video.

Adding a super cap / ultracap of more than a hundred farads will give the storage capacity to run the JT for several hours after darkBut why would

[pkmmama]

@seennlisten, uF.

[pkmmama]

@xear3d2009, it's a germanium diode.

[pkmmama]

What is the voltage required for the LED?

[pkmmama]

What is the voltage on the LED? How many volts are required?

[seennlisten]

which capasitor do i buy to make a solar usb charger, is it 470 mf or 470 uf?

[shaurya6seth]

umm i don't think u need an LED if ur allready in sunlight!

[xear3d2009]

may i ask..is that a resistor above the capacitor?

is that a solar panel from a calculator?

[xear3d2009]

may i ask..is that a resistor above the capacitor?

[MrHobiecat]

If you get rid of the FLuke 83, which only reads average voltage and current, and get a Fluke 87, which reads true RMS, you will learn that all you are doing is confusing the average readings the cheaper meter takes and fooling yourself. With pulsed power, average power does not equal RMS (true) power. You are not snarfing any free energy, you are demonstrating what happens when people suck at math.

[lennyhome]

Congratulations on your achievement in getting less light from more light.

[trailkeeper]

I was originally going to say that the diode was not needed if you only use the LED, but I guess it's needed to charge up the capacitor or battery to prevent "drainback" of power back through the mini solarpanel. If your not charging a (storage) capacitor or (storage) battery, then I guess the diode is not needed and the LED can be ran directly as long as the solarpanel gets light.

[ming15goy]

hello every one... you know i realy like this video..... i realy need to study about this..

:( pls.. give some father example.. :p.... tnx

[rajbebe]

where is the joule thief??

[15JaspeR15]

can it power a motor from a toy car

[15JaspeR15]

can that power a toy car motor??

[Eddiev1985]

Hi Kubikop,

Thanks for the video.

You never fail to amaze me.

I cant wait to see the next step.

5 stars

Eddie

[kubikop]

Thanks, I have it charging the Supercap now and that lights the LED for quite a while before it goes down to low brightness. Ill build another joule thief tonight.....

Paul.

[tim0090]

you still need a current resistance in series with the led because its only limited by the resistance of the led and could shorten its life. also you multi meter is going to dran a small charge this depends on the quality of your multimeter.

[kubikop]

Yes, your right and it still lights the LED, point well taken, it moves the coil on the meter too.

Theses little solar cells sure can do some work.

Paul..

[yuhcgte]

damn paul., its some nice stuff,, and i love ur other videos too.... one question,,, where can i get the toriod out of the house hold electronics.??

[kubikop]

Old CRT Monitor have quite a few in them, or buy a cheap 11w Fluorescent Lamp and saw it in half on the seam a bit then put a screwdriver in it and twist.

There should be a few in there...

Hope this helps.

Paul..

[Daemo4]

Is the solar cell putting out DC electricity? If so, does the LED only work in one direction, or maybe better one way than the other?

[Can101276]

yes solar cells output DC, you need the diode to prevent electricity from flowing from the storage tank.(capacitor in this case, could be a battery.) An LED is a diode, current only flows in one direction through a diode.

[kubikop]

Well put.... Germanium diodes are really efficient for this as they Break down at 0.3v instead of 0.7v. Ideal for our 0.3v Limit on our joule thief circuit.

Paul.

[Pirate88179]

Nice work!! (5 stars!!) Once you add the joule thief circuit you will be able to light a bunch of leds with it. Then, maybe face them toward the solar cell and see what happens. I have always wanted to try this and bought 3 good size solar cells but have not got around to it yet. I don't think I can make it self run but I may get close. Keep up your great work here.

Bill

[Eddiev1985]

Hi Bill,

That is an engenious idea.

I may have to try it as well.

logicaly, it should work.

Eddie

[Can101276]

WOW, that would be incredible, great idea.

[kubikop]

Bill - Cheers I have a 12W Solar Cell I charge my battery bank with 12v 42Ah, Im going to scale this up when it works....

Did you find a Rheostat?

Paul.

[37474748]

sweet man!!!! 5/5

[kubikop]

Thanks.....