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- เผยแพร่เมื่อ 18 ก.ย. 2024
- This joule thief works much better when the ferrite core is shorted with a wire - a magnet or a capacitor. I adjust the trim capacitor for the best resonance.
The magnet must be adjusted in strength. Here are 9 pieces best.
Try it on other jouel thief and they oscillate much better. 10 times more light on LEDs.
You had me there for a minute, I thought shorting the coil would lower the frequency but after I thought about it your right, it would lower the permability which would result in less of a charge each cycle therefore would raise the frequency, faster cycles.
I did not realize this would raise the peak voltage though.
I have got to get back into electronics!!!
Permeability is not affected, except maybe by the magnet. Permeability is the physical attribute of the core. But inductance is directly affected. Shorting a coil basically means rendering the inductance zero!
Also you are wrong about the "less of a charge." If a coil has less ability to store energy, it has less frequency. The more inductive a coil is, the higher the frequency.
@@heavycurrent7462 whaat?
The higher inductance coil cannot be higher frequency....?
@@TravisTellsTruths Go back to school kid
@@heavycurrent7462 I'm still here. Adult school though 🏫 That's why im clarifying with you. Please do explain for my education 🎉
Thanks again. I never could get a Joule Thief to work, however, I created my own circuit, I incorporated your shorted loop as a 6 turn coil along with the 2 regular coils, used the positive input as my positive for the LEDs as the other way never works for me, and did not this time either. on a 1.5v battery, lights up 72 LEDs with no drop in brightness (same brightness as a single one). 3-5v and they're at full brightness. Happy day!!!!
Nice & 4 others: A self-oscillating voltage booster. Can use nearly all the energy in a cell, even when other circuits consider the cell dead. The name suggests that the circuit is stealing energy.
The circuit is self-oscillating (blocking oscillator) forming an unregulated V booster. No energy is created by the circuit. Output V is increased at the expense of higher current draw on the input. The amount of power entering the circuit is the same as that leaving, minus losses in the conversion.
Very nice example of a working joule thief and what happens when you short it out. Most examples leave this juicy tidbit out. Nice Work!
I played with shorting coils for a while & got some interesting results. On one occasion I discovered something really interesting with a Bedini Motor & two Magnetite Generator coils... that if they were aligned in a specific way & I attached a switch to isolate the DC negative line of the rectifier this isolated the extraction of electricity generation but it seemed to enhance or speed up the mechanical rotation of the Rotor to quite a degree... so the coils rather than creating drag were actually boosting the rotation or the free mechanical work...
Yay congratulations! You not knowingly learned about the ancient "magnetic amplifier" or "magamp". Ferrite is indeed magnetic to whomever said it wasn't in the comments. Magamps are really awesome and you should look into them. They were used as flip flops, transistors, pulse controllers, and amplifiers long before the aforementioned existed. :-) they can withstand more power and are indestructible compared to modern components... plus they can be made fairly easy with no manufacturing requirements... electronics without serial numbered bulk components, self made, are always more rewarding in exploration
That's a tunable capacitor you are using....apparently you are finding the resonant "nodes" in the tuning circuit!....very cool!
Put a 104 cap across the base resistor and notice a huge decrease in current
Very well done, but you surely must compare the input power into the circuit also !
What current does it draw from the battery, when you use the shorted wire or shorted cap at the toroid core ?
Looking forward to see more tests with that.
Regards, Stefan.
This is great!!! I think there's nothing more better joule thief out there.
i made 3 joule thieves and what i learned from that is that smaller toroid (same length of wire) = more power
and of course it has it's limits but from what i saw in this video there are instabilities that may make what i said above wrong
I put 2 toroids in my joule theif with a 1k resistor runs at full power. I put it in a pickle jar glued to the top of the lid with a water proof switch I glued 2 rocks inside so I can use it in water for light.
Such a nice clear demonstration! Thanks!
Do you think this would work to get higher voltage from a flyback transformer? Never mind, I'm going to try it right now. I'll let you know. Oh buddy, it works!!!! Holy crap!!! I LOVE YOU MAN!!!! I'm using a small flyback transformer and a simple circuit (all parts rescued from the same T.V.) I was getting about half mm arcs at 11v input, now I get one and a half mm. I used 6 turns of quarter mm thick magnet wire on the ferrite core, then purposely shorted the coil, nice results. Thank you very much for this informative video. I learned something this morning, and I am quite pleased. For anyone who says those aren't big arcs, no they're not but I'm using a lower voltage transistor than people usually use. I can run it on a minimum 1.5v battery. I can say that a better transistor or a bigger flyback would not run on that low of a voltage.
I just learned something else thanks to this. If the shorted coils are wound the wrong direction, the output is lower and if 2 coils are wound in opposite directions the output is the same. Now I'll try with 2 coils wound the correct direction. And it slightly boosts it, not much.
I'm trying to learn the basics here. Can you you please tell me what you are all happy about in a nutshell? lol thanks
I'm happy about the fact that I can use a shorted coil to get a higher output from a flyback transformer. This logically should not happen since the shorted coil shouldn't be doing anything at all. Friend, I'm learning the basics myself so anything that I discover that helps what I'm working on is great. Basically, using a joule thief and adding the flyback ended me with 72 LEDs fully lit off of a AAA battery. Adding more LEDs after that just requires a resistor and transistor. Granted, I could get my hands on a better transistor, use my step up power supply set on 12-24v and be able to fully charge a 1900v DC capacitor in about 3 seconds. By the way, don't touch a fully charged 1900v DC capacitor, it can kill. If not, it's going to hurt a lot.
Yes, I think it would. I had a thought about these joule ringers and wondered if I could use a small flyback transformer (the tinny ones used in newer LCD monitors) and covert it to a joule ringer. Well, I tried it and it worked beautifully! I glued it to the bottom of a small 10W CFL bulb and use it as a camping lantern. Only the pigtail for the battery is exposed. So that being said, you could wrap another winding around your "conventional" flyback, short it, and should see increased output (in theory). My thoughts are, this will get the FET/ transistor hotter than usual so you better use an adequate heatsink.
actually thats pretty shit. I was getting 6cm arcs no bullshit with a 555 timer driver from 12 volts @28khz!
what u did there is basically a type of a flyback transformer. This is used to slightly boost the current in the anti-phase. This trick is often used in cfl inverters.
Does the variable cap adjust the frequency? --- YES.
I have a variable resistor to adjust base current, this also adjusts the frequency , would I be able to achieve the same result?---- I am not sure.
There are no overunity.
Very good - I know about the magnets, but the cap and wire were news to me - please hook the battery to a milliampmeter and repeat for us. Good work.
This device is an inverter. Convert DC about 0,6 -1,2 volt to 2 volt Dc puls. Several kHz. No overunity. Called Joule Thief because it can use energi from old ( dead ) alkaline batteris AAA and light diodes.
@acmefixer1 The long leg of the diode is negative on the battery
I want to replicate one, So can you please tell me where the battery's + & - terminals are connected to. Thanks.
When the core goes into saturation or is shorted.The frequency becomes higher and peak voltages rises. The current increases as well.
The more magnetic field you create the more output you have,i wound coil around an old microwave transformer and from a 1.5v dead battery got back around 15volts and about half an amp. Im convinced the size of the iron core increased the output and i only had 34 turns. Im sure its all down too how big the field is when power is shut off.
Beautiful work.
I know that capacitor - it is widely used in am/fm radio. it also known as adjustable capacitor - air type
How does shorting out the ferrite or adding a magnet effect the ma draw on the supply battery? Nice demonstration!
it just changes the frequency of the oscillation
Yes, battery used up quicker, when I short the coil.
this is a cool! but did you just add antenna for added power?
Hmm... Very interesting!
Thanks 4 sharing. I will try it out next time
Xmas greets M
It's hard to explain. You change the ferrite core frequency in which it operates. When you hold a magnet on the core the permeability is lower and It raises the frequency with higher peak voltage.
No.. if permeability gets lower, then frequency drops since the inductance also drops.
Nice vid. Would love to see the actual amps and volts going on.
Hi,
Try with 100 pf and if it don`t work. You can put a capacitor 100 - 200 pf more in serie.
Good work
Just a question : Did you extract more energy from de battery whith this system?
Eric
Im sure instead of using a graphite ring use a magnet and a few caps and once the device is charged once the alternating current disrupting the field from the magnet will keep itself going indefinately. Im going to experiment with this idea as a magnet always has a field but you can only tap that if the field is interupted say by an alternating current or joule thief.
The ring is not graphite, it is ferrite. A magnet will not stick to graphite. The only reason a magnet would cause this is possibly because of the magnetic field from the magnet interfering with the magnetic fields of the coils.
Wel done ! Will an LED also light up, if you use this instead of the capacitor in the ferrite core
as the shortout ? Many thanks.
Hello, Very kool and creative experiment! You use a 0-250 pF capacitor. What do you think is the lowest pF needed for your setup? I dont want to buy and pay more than nessesary.
It's EASY . The short OR the magnets,easily, significantly lower the value of the coil inductance
does the brian still pick up the flicker rate and, could this be dangerouse?
omg a million times thanks from me thattz exactly what my monster torus was missing ^^ video following
When the leds lights brighter. The current to the circuit increasing.
this is very nice resonance setting with LC , but what is ,if you use just 0,5 volt , you try this experiment , regards , i take 2 Henrys 33mikro farad and combine it together with a inductive short circuit of copper wire , it works well ,and is micro small ,works just with 0,5 volt . in your experiment you just set up the inductance higher , for search the maximum light brigthness , with magnets or wire , , what will be if you build just a inductive coil potentiometer , so you can move the poti for the right resonance .
Does the variable cap adjust the frequency?
I have a variable resistor to adjust base current, this also adjusts the frequency , would I be able to achieve the same result?
Sorry can't try myself, as mine has solid laminated core
Thanks for sharing that looks great does it last longer?
I too would like to replicate this. You have quite a few variations from standard joule thief. Could you post a circuit drawing?
I can see most of whats going on. But a drawing would help :)
I'd love to show this on a scope and other meters....
Thnx. I was just curious. I wonder what would happen if a feedback coil was added and the power from the feedback was collected. xD
Thanks a lot , I can fathom that.
so will the light stay on longer too? have you made efficiency measurements?
I would like to replicate the circuit. I would like to know how the LEDs are wired and what is their polarity. Thank you. Should be called Joule Thief? Because there is no coil connected to the collector, and some other major differences, I don't think so. But it's an interesting circuit. You should put an AM radio by it and see if it will tune to the AM broadcasting band.
,
Hi, Is the current thru the winding before coming to the "LED", AC or Pulsed DC?
Do you think that a larger scale model of this would be more cheap or efficient than an inverter,, to run lets say an AC heater?
You can see all on the video.
Thanks don LARSKRO !
I tested with the thicker wire around the toroid and I got less Current flowing through the led ( it lighted weaker) I think it pushes more current from the battery I should try later with another way to get the current from the thicker wire
Not very useful, without any comment, without any figures, such as voltages, currents, power, efficiency.
this is not empirical.. it depends on the toroid, the windings, the freq.. etc... plus you are adjusting capacitance in the circuit not resistance so it could be said you could achieve the same results without the extra shorted wire.
nice work
Интересно, автор ещё жив.
That is awesome sauce. What about input requirement?
thanks for the replies.
Hi sir is very good job plz for diagramm.
when you say ten times more light do you literally mean ten times more light/energy or do you just mean much brighter?
I mean much brighter.
How is it done with 1.5 volts? doesn't LED's need 2.3 volts?
Yep, but that's the beauty of the joule thief. It uses the toroid inductor to store energy in a magnetic field, and when there's enough, it dumps it all at once through the LED. Instead of providing a steady stream of current, it delivers it in higher voltage pulses. If the LED pulses quickly enough (like with AC light bulbs), we perceive it as being fully lit.
have you a drawing of this?...i cant make out where the cap goes...cheers.
3 reed leds
Please provide the schematic of the circuit for this Joule Thief. Perhaps it is easy for some to follow and replicate the circuit simply by watching the video. But for some of us, a schematic is really needed to understand how the circuit is connected and working. I have built a couple of joule thief circuits, but I still couldn't figure out what you really mean by 'shorting' of the ferrite core even after watching your video a few times. So, PLEASE, a schematic!!
I haven`t make a schematic. Do it yourself.
ht tp://ww w.yout ub .com /watc h?v=uhYEdD 94vH0 this one showa perfectly on how to do this
He means put an extra wire around the core and connect the 2 ends together instead of to any other part of the circuit. When the other 2 coils oscillate, that third wire oscillates as well. I can see this working better if the loop of wire was an extra coil.
Tom Hoehler
The person who invented this circuit called it a Joule Thief circuit, not a boost converter. A boost converter is similar but only has a single coil inductor, not a torroid. It also has capacitors on the input and output as well as using 2 resistors instead of one. It uses an integrated circuit whereas the Joule Thief does not. Flashlights use neither of those circuits. A flashlights circuit is actually better than a Joule Thief, but not quite as good as a boost converter. A boost converter can have any output voltage you need depending on the components and can have an output higher or lower than the input voltage. I guess you don't actually look at these circuits to see what they have.
A joule thief does not tend to have a higher voltage on the output, just a higher current through the circuit.
Okay, either way this is not the same as a boost converter. A joule thief will seem to boost the voltage because the circuit is oscillating . I suppose if you put a large coil of thin wire on the torroid with a bridge rectifier and capacitor on the output you would effectively boost the voltage. Thinking back a couple months, this video helped me to light 72 LEDs off of a joule thief connected the way this circuit is designed then connected to an extra coil on the torroid. The output on the extra coil was AC. Redesigned it could have some potential to be a good boost converter. and maybe inverter. This is giving me ideas now, thanks for making me think.
Sorry but what exactly does it mean to short a ferrite toroid?
thanks
Also how many 20mA led it can lit at a time, regards.
mh i would love to upload the megajulethief project but looks like we have a easter upload down or somthing here goes nothing (not that it would be much diffrent whit gprs normaly ^^) got 15 videos 600 mb ^^ could take a while whit 65k anyway ...now i have to wait on youtube to
Very good!
How much is frequency
can you teach me whats this..? eager to know
cool vid
Hi, can you put Amp metar and Volt metar i the circuit?
OK Thank you
Which two wires in a Joule thief circuit do I join to short it?
the short is in the wire or capacitor running thru toroid not the transistor leads
How long did the battery last?
so thats the thing hes turning?
Nice
The music on the background.
Pulsed DC
you are just causing earlier saturation of the core.
Este vídeo es tan falso como el dueño, por empezar el BC547 esta mal polarizado, y lo que es mas extraño es porque no varia cuando acercas la mano ???
When I short it the same way my light gets dimmer not brighter.
Left +
Would 0-100 pf work?
can you give a schematics
BC 547 ?
More than 10 hours
Молодец! схемку бы...
Se video igen.
еще не разомкнул, уже отключили
Sorry that you are a mute. Your video would have been great if you had a non mute person telling us about about your project.
Micro Joule Thief
Micro Joule Thief
Joule Thief???? ... fkn lieee!! its just an inverter, a simple circuit for an electrical or electronic student ¬¬