All You Ever Wanted To Know About The Joule Thief

Поділитися
Вставка

КОМЕНТАРІ • 219

  • @pk2712
    @pk2712 7 років тому +3

    In your first diagram with the led in parallel with the inductor , you need to reverse the polarity of the led in order for the led to light .

  • @ronvanwegen
    @ronvanwegen 7 років тому

    Best explanation of Joule Theft on the internets I've seen (and I've seen quite a few). Full marks. Excellent video.

  • @NiVofHiR
    @NiVofHiR 3 роки тому +1

    I think your on it mate! Keep up the good work, this would be a good video to redo, only make it shorter, more concise. One of the best joule thief explanations I have seen to date after almost a decade of joule thief learning and experiments. Big up to the Robert Murray of the Smith as well! BRAVO LADS!

  • @Buzzhumma
    @Buzzhumma 7 років тому +7

    great explanation Ashton, and nice to meet you. I was always under the impression that the winding being in the opposite direction on the primary would be blocked by the secondary as an opposing field being that as the primary field builds and so to does the reverse blocking secondary field but your explanation gets me wondering . thanks for you effort😀

  • @shermluge
    @shermluge 7 років тому

    I've seen several explanations, I understood the basics, but this really made it crystal clear..Thank you..

  • @solarhope
    @solarhope 9 років тому +2

    I just realised its been 44 years since formally studying this at tech college as a telecoms apprentice.
    You show it is still understandable without the maths! - great start.

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому +1

      solarhope cheers mate, my belief is that the maths is slave to imagination, a useful symbolic reduction for when we need something concrete to hold onto, but i think most of it can be visualised and understood without ever formally symbolising it

  • @shanejohns7901
    @shanejohns7901 Рік тому +1

    "A “Joule Thief” is a simple voltage booster circuit. It can increase the voltage of a power source by changing the constant low voltage signal into a series of rapid pulses at a higher voltage."

  • @johnrussell5598
    @johnrussell5598 7 років тому

    Great Explaination. Inductors are fascinating. Thanks J.R.

  • @gfridhar
    @gfridhar 7 років тому

    That was fantastic. The detailed description of the concept is really good. Many a thanks for this video.

  • @knoxpruett1889
    @knoxpruett1889 4 роки тому

    And that, is the way to explain the operation. Section by section, then put them together! Great job Robert!

  • @BillHester2011
    @BillHester2011 2 роки тому

    Cant believe this was made... nearly 7 years ago! What a great explanation.... feeds curiosity!

  • @igwechi
    @igwechi 4 роки тому +1

    Brilliant video, I like how you started out with the conceptual foundations.

  • @BobMellor1954
    @BobMellor1954 8 років тому +4

    Thank you Ashley, you have provided a clear understanding of how a back emf works that I can fully understand; keep up the good work. Regards Bob

  • @aravindhvasu195
    @aravindhvasu195 6 років тому

    That was purely awesome!!! Excellent mate ...thank you

  • @gorgephillips1565
    @gorgephillips1565 3 роки тому

    I have been watching you last week takeing kn everything your teaching me i love it want as
    much you asyou can put outaneedto know please more of old batteis know one had time
    to tel, me thank you ever much your new student G.R.P.

  • @billbailey4615
    @billbailey4615 8 років тому +1

    i finally understand this circuit.i have sadly watched way to many video's,but this explained it in simple terms.it can be replicated
    easily.RMS is a master at this game,if he hangs with Steve i would imagine he is very competent also.I'm glad you were allowed to join with them . i expect great things from you as this is one of my most trusted sites.no bs or tricks there ever.thank you

  • @ArtisticImpressionsbyBobRouth
    @ArtisticImpressionsbyBobRouth 9 років тому +11

    Thank you so very much....I NOW understand. It sure is alot easier to wind a nail or spike instead of winding the torrid ring. This was the most useful video I've watched in a long time.

  • @jprice1122
    @jprice1122 9 років тому +14

    Nice addition to the team... :)

  • @deathkeys1
    @deathkeys1 8 років тому +1

    have I already told that I love this channel and you guys are awesome? if not, consider that!

  • @1495978707
    @1495978707 Рік тому +1

    4:10 Your diode is backwards in this diagram. When the switch closes, the inductor uses its stored magnetic energy to continue driving some current in the same direction.

  • @synespro
    @synespro 9 років тому

    Awesome thank you. ive never found a good joule thief explanation so black and white. Again thanks for making this and i look forward to more teachings in the future. A practical use for a joule thief is an earth battery light and/ or a crystal cell battery

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      ***** cheers mate, earth battery sounds rad

  • @debeshbhattarai
    @debeshbhattarai 8 років тому

    You really inspired me so much... very easy explanation of Joule thief circuit... Cheers..!

  • @LostInLeiden
    @LostInLeiden 3 роки тому

    @ashley mills, excuse my ignorance but at 4:05 you say the direction of the coil winding is important to determine which way the magnetic field (and therefore the EMF) builds up when switched on (and then off) but doesn't an inductor always build up an EMF that opposes the current creating it, so does the winding direction really play a role or am I missing something?

  • @jeffpatrick1864
    @jeffpatrick1864 2 роки тому

    Great work bub! Inadvertently answered about a hundred other things I needed answered. Thanx
    Wow, such an old vid lmao

  • @jeromekerngarcia
    @jeromekerngarcia 6 років тому +2

    *+Robert Murray-Smith:* Where-ever did you find a soft-iron nail to use for xfrmr core? Almost *all* nails are made of mild steel = poor choice for xfrmr cores!

  • @TheJaCaMo1
    @TheJaCaMo1 9 років тому

    Ah brilliant video! I was waiting for this to come - and then be linked to capacitor discharging :) good stuff!

  • @francismannion7075
    @francismannion7075 5 років тому

    Great video!!!! It was fun watching and I learned a lot.

  • @FireSymphoney
    @FireSymphoney 3 роки тому

    wonderful wonderful explanation, the best explanation I found online.

  • @randomlettersqzkebkw
    @randomlettersqzkebkw 9 років тому +2

    Please please... keep all your explanations as simple as this.
    Very good explanation!

  • @triumphmanful
    @triumphmanful 7 років тому

    So what can I make at home with this info. ? Anything I can use for security lighting, plant growing, or ? would be useful . Thanks

  • @DrSaminstine
    @DrSaminstine 9 років тому

    Great insight into the circuit and nicely explained I always enjoy this channel and this was no exception thank you for sharing

  • @emcgon
    @emcgon 9 років тому +1

    Nice explanation - thanks. However, in the first diagram (beginning at 3:24) I think you are showing the LED the wrong way around. The back-EMF induced across the coil when you open the switch will be more positive at the switch side than at the 1.5V rail side, so you will need to connect the LED the other way around for it to light.

  • @just1fix2004
    @just1fix2004 9 років тому +1

    Great Joule Thief tut man, I think it will be handy for the power I'm trying to harvest.

  • @rctbone100
    @rctbone100 2 роки тому

    what determines the on-off frequency, and by changing the transformer what range of frequencies can you create? Any shielding suggestions for use in an airplane??

  • @DwiNoviantoUntidar
    @DwiNoviantoUntidar 7 років тому

    Can u tell me the formulas to determain how many turn should i do to make those coils?
    thanks at first.

  • @br.davidriccio5898
    @br.davidriccio5898 4 роки тому

    Thanks a million for this simple video! I've been trying to get this Joule Thief to work but to no avail. Now I stand a chance to get it to work. BD

  • @amirrahiminia2556
    @amirrahiminia2556 7 років тому

    Very interesting and thank you for sharing it with us but I think the problem with this circuit for stepping up the voltage is efficiency which seems to be bellow %50. I wounder if a resistance load to collect the short cut phase of the oscillation would effect the circuit. ie. between Emitter and Ground.

  • @sparkfishes
    @sparkfishes 9 місяців тому

    Love the channel. I a bit puzzled when the relay and the 555 timer is introduced as surely that needs 12v and 9v respectivly to work .that is not referred to and seems to move away from the original intention of boosting a 1.5v battery to drive a LED

  • @brucewayne-cave
    @brucewayne-cave 8 років тому

    Outstanding Job !!!

  • @8ank3r
    @8ank3r Рік тому

    Thanks so much for the simplification, i think my little mind can comprehend it now :)

  • @tlar1272
    @tlar1272 3 роки тому +1

    Is the LED at 3:30 facing the wrong direction? Like a fly back diode. But with light. Thanks for the detailed explanation!!

  • @BrentLeVasseur
    @BrentLeVasseur 8 місяців тому

    Who is this bearded, meditating, mushroom loving, hippie genius? 😂😂 Seriously though, brilliant explanation! And it’s the perfect case study in non-linear dynamics. IE…how do you create a circuit that automates and regulates itself through non-linear phase and field transitions? That’s no joke, genius stuff right there!

  • @andrewkhchan
    @andrewkhchan 5 років тому

    How many turns of winding on the nail ? Thx

  • @Spinningininfinity
    @Spinningininfinity Рік тому

    Ahh, the good old TNT revisited
    Still so useful, still so worthwhile.

  • @InterdimensionalWiz
    @InterdimensionalWiz 8 місяців тому

    superb description! like this guy...can you do the same with voltage multiplier and the fractle volt divider.... ta!

  • @PoiSonSonic
    @PoiSonSonic 7 років тому

    Hello Ashley. I'd love to see more of your videos. Please tell me where to find more. Cheers

  • @TheGEODEAHOLIC
    @TheGEODEAHOLIC 9 років тому

    good addition to the team, nice 1st effort at explaining & demonstrating the joule thief.

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      TheGEODEAHOLIC cheers, took me enough time !

    • @TheGEODEAHOLIC
      @TheGEODEAHOLIC 9 років тому +1

      these things are a learning process, rob has done hundreds, you'll get clearer & more efficient with practice over time. good 1st effort.

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      TheGEODEAHOLIC thanks for the encouragement!

  • @chifoltz9023
    @chifoltz9023 3 роки тому

    Awesome, thank you! Just out of curiosity, did you just finish installing a transmission before you made this video?

  • @newmonengineering
    @newmonengineering Рік тому

    You can ommit the 555 timer in the relay circuit. Feed the relay coil through the normally closed contact. By doing that, the relay will turn on in the off state, and off as soon as the contact breaks. It's commonly called a relay buzzer circuit. If it is controlling different voltages you need a dpdt but if it's the same you can use a dpst. It has to be a double pole with a nc and no connection. Normally Closed and Normally Open.

  • @danajohnson3799
    @danajohnson3799 9 років тому +1

    It's always difficult to know who your audience is on You Tube and their level of understanding. All in all, a very good operational description of the "Joule Thief" circuit. The only comment I would make is to avoid the use of acronyms such as EMF (Electromotive Force) without explaining what EMF is. If you use electromotive force in your presentation then counter electromotive force should also be explained and used, otherwise just use voltage. It's a small criticism, which indicates how good your presentation was. Thanks Ashley!

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      Dana Johnson thanks Dana, good point about the acronyms, so easy just to assume people know or even overlook it entirely

  • @joshuaamerson2365
    @joshuaamerson2365 5 років тому

    The windings a 1:1 or the secondary need more windings?

  • @jamiejoker118
    @jamiejoker118 3 роки тому

    I call it the see seesaw effect nice down to earth illustration thanks.. NOW we want a video using the idea with a super cap setup via solor panel

  • @evanleebodies
    @evanleebodies 3 роки тому

    Brilliant explanation

  • @kingshahzad78
    @kingshahzad78 7 місяців тому

    The best Explanation ever. Thanks❤❤❤❤

  • @roman_abelardo
    @roman_abelardo Рік тому

    Gracias por su aporte, una pregunta: es factible emplearlo en un circuito de Radio Galena sin energizar? con el fin de aprovechar las señales de radio frecuencia 🤔

  • @planetlimbo5981
    @planetlimbo5981 5 років тому

    Would a bifilar pancake coil help pull the current more?

  • @PulseFuelNerd
    @PulseFuelNerd Рік тому

    How does joule thief- joules per lumen compare to standard LED joules per lumen?

  • @GreenmeResearch
    @GreenmeResearch 9 років тому +1

    Great and clear explanation.
    Talking about Back-emf are you known with the delayed Lenz law?

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      Greenme Research cheers mate, i've not looked at the delayed lenz law mate

  • @muhammadarifwicaksono476
    @muhammadarifwicaksono476 7 років тому

    Excuse me, i want to ask, what the other name of joule thief in electronics theory exactly? thank you.

  • @metitusable
    @metitusable 4 роки тому +1

    What about using just a transformer to escalate the voltage? Thanks

  • @THOMASTHESAILOR
    @THOMASTHESAILOR 8 років тому

    Excellent Video Mr. Smith, How about a video on the current flow involved in a Joule Thief. You'll definitely need an oscilloscope to really look at that circuit. It's truly amazing

  • @joeyocom5087
    @joeyocom5087 8 років тому

    I have wired a Ferrite ring in parallel with telephone wire....
    (2 sets of windings, counter rotating)
    ........and it will light the LED down to .31 V, with a TIP31 Transistor.....470 resistor
    ......................... at .31 V it stops working.
    Best coil I have made so far.
    Ferrite Tubes are noise suppressors in certain electronic cables, computers monitors etc
    THEY WORK GREAT !!! and are compact !!

  • @userou-ig1ze
    @userou-ig1ze 3 роки тому

    how can people do this with inductors only, no toroid? Some circuits achieve this using a capacitor and multiple inductors

  • @omsingharjit
    @omsingharjit 5 років тому

    so we can say it can increase or bost voltage ?

  • @fredriko.zachrisson9711
    @fredriko.zachrisson9711 8 років тому

    Hi Robert. I recently discovered your graphene videos, and i read that you have written a 101-book that seemed like a great book from what ppl had to say.
    I just wanted to ask where i can order a copy?
    Thanks in advance.
    /Fredrik.

    • @ThinkingandTinkering
      @ThinkingandTinkering  8 років тому

      +Fredrik Zachrisson It's on smashwords mate and i believe amazon

  • @digitalfun59
    @digitalfun59 9 років тому

    Great presentation.

  • @martinnottsperfectcoins1930
    @martinnottsperfectcoins1930 8 років тому

    wow i actually understood every thing you said 10 out of 10 great teacher very fun to watch you guys

  • @crusaderanimation6967
    @crusaderanimation6967 3 роки тому

    5:14 "Transformer works by warping another coil on the same nail"
    I love and hate this quote so much XD

  • @BluesDoctor
    @BluesDoctor 9 років тому +1

    Ashley, if you want to take this to a next practical step, review a voltage multiplier. Image Intensifier is high voltage tube that runs on AA battery. Cold plasma another application with some very cool applications where this can be used. No end to what can be done with cold plasma device. My experiments investigating healing graphene defects with CP, if you want practical application. Cheers mate, you are doing good work.

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      BluesDoctor thanks for the tips, I'm excited to see where this stuff goes. Good luck with the graphene defects stuff, sounds interesting :D

    • @BrentLeVasseur
      @BrentLeVasseur 8 місяців тому

      Wow! So you have actually healed graphene using cold plasma? That’s like a Nobel Prize level accomplishment. Why haven’t you demonstrated this or published any papers? By the way, if it does work as you claim then what you have demonstrated is known as ‘negative entropy’ which is the second law of thermodynamics working in reverse! That’s bigger than Relativity in terms of its impact on physics.

  • @ArtisticImpressionsbyBobRouth
    @ArtisticImpressionsbyBobRouth 9 років тому

    Can you increase the output by increasing the input or could you run multiple joule thieves' in a series?

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      ***** increasing the input will increase the output, but the point here is to run it down to a low voltage, it would be interesting to try connecting a bunch of these up in parallel. I would like to understand the load characteristics

  • @corywilliamsmith
    @corywilliamsmith 6 років тому

    Yes I really like your teaching

  • @Chadwickyboy
    @Chadwickyboy 3 роки тому

    I believe your LED is backwards in your whiteboard diagram around 4 minutes in... no? Looking at the coil: upon opening the switch, the lower portion of the coil will at positive potential, reverse biasing the diode.

  • @luisrolon6421
    @luisrolon6421 6 років тому

    maxwell wrote about this. he noticed that the pulse after system was turned off had MORE ENERGY than original pulse!!!!!!!. to me that is the key to overunity. the key to overcoming back emf etc.

  • @luisrolon6421
    @luisrolon6421 6 років тому

    noughtpoint seven volts means to me:any sorce of voltage ex. ground battery will be enough for lighting...

  • @jorgenieto2972
    @jorgenieto2972 9 років тому

    Awesome info thanks

  • @bushidobadboy
    @bushidobadboy 8 років тому

    "After I had meditated outside for a coupe of weeks..." Ha, classic, love it. And I liked the way RM-S looked round, at the amusing comment.Love the films gentlemen. As a bit of a youtube educator myself, I applaud what you do!Question: is there any way that old batteries could be utilised, via the joule thief (or other method), to help charge a 1 mega farad capacitor? That would be a nice way to use other peoples waste batteries to help power a home or car? Just an idea, sorry if it is patently ridiculous - my primary area of knowledge is the Human body/brain, and I got a piss-poor grade in my A-level electronics exam, lol.

    • @ThinkingandTinkering
      @ThinkingandTinkering  8 років тому

      +bushidobadboy lol - cheers mate and i will have a look into that - good idea!

  • @sksahil4374
    @sksahil4374 5 років тому

    What is the frequency of joule thief
    Ckt ...

  • @audio211
    @audio211 6 років тому

    Bro thanks for the very nice explanation about the concept of circuit now I got an idea to develop it much later. Can I aplly this circuit on inverter?plss answer ty

  • @icebluscorpion
    @icebluscorpion 5 місяців тому

    You can go further and ditch the 555 timer get a relay the two separated contacts to build two separated circuits. The one switch (NO) is attached with the julethief. And the second relay switch (NC) is in series with the relay coil and the relay will buzz happily away like a buzzer. Note both switches have to be electrically separated they are two different circuits the are only mechanically connected in the relay.

  • @robertlanham8076
    @robertlanham8076 9 років тому

    Great video young man, robert I could see your mannerism's in that young pandawan

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      robert lanham haha, just need to get myself a boiler suit and a ciggie lol :D

  • @thebeststooge
    @thebeststooge 8 років тому +1

    I just stumbled onto you and this video and I must say very well said. Video editing sucked but your explanation was spot on. Now I have read that the type of inductor used helps with efficiency so you can go even lower so a nail will work, or any metal, but is not optimal as say a toroid. I know that it matters EXTREMELY which transistors you use and a germanium transistor has a lower starting voltage so that .7v to kick it on suddenly becomes .3 or .4 so even more of the battery, or an even lower voltage solar cell, can be used.

  • @billspradlin9619
    @billspradlin9619 8 років тому +1

    Isn't the Diode drawn in the wrong direction? Because when the switch is closed the current will go through the diode not the coil. This is similar to a diode on a relay coil and normally the cathode of the diode is towards the positive rail. This type of arrangement is usually called the flyback diode. I could be wrong.

    • @ThinkingandTinkering
      @ThinkingandTinkering  8 років тому

      +Bill Spradlin so could i mate - but i don't think so - i will recheck though

  • @Equinoxtrills
    @Equinoxtrills 9 років тому

    I've built dozens of joule thief...and this is a good explanation, why dozens? Good for laser driver (sometimes...depends on the laser diode)

  • @kingshahzad78
    @kingshahzad78 8 місяців тому

    The Best Explanation Ever

  • @cphank3722
    @cphank3722 Рік тому +1

    The LED at about 3:30 to 4:15 is connected backward in the whiteboard schematic.

    • @Ozzy3333333
      @Ozzy3333333 Рік тому

      He has most of it right, but not all of it. Specifically the turn of mechanism of the transistor. 11:20

  • @CountryHouseIncubators
    @CountryHouseIncubators 8 років тому

    Thanks for the video. I noticed you said the voltage out depends on the rate at which it switches on and off. If I use your setup in simualtion you get Huge voltages over 100V and everything explodes and yet yours doesn't. Is there a reason why this isn't a reality?

    • @NorthernKitty
      @NorthernKitty 4 роки тому

      I realize this is 3 years after you asked, but as I understand it the voltage will be limited by what the LED draws. I know they warn against letting this go "open circuit" as the voltage will spike very high across the transistor. (And I think this is why it's important that he mentions the battery MUST supply less than the LED needs, so that the transistor shuts off and recycles everything.) If so, I would think it wise to design "over-voltage protection" into the circuit. Perhaps the simulations don't account for an upper limit on the LED? But in reality, I think the LED just happily draws what it needs and stops there. Someone please feel free to correct me if I'm wrong, otherwise I hope this is helpful.

  • @skrame01
    @skrame01 8 років тому

    Great job great explanation.

  • @cmj20002
    @cmj20002 6 років тому

    Mine runs when the battery is at .5 of a volt. Once it gets below that the LED will flash on and off.

  • @mukundsrinivas8426
    @mukundsrinivas8426 9 років тому

    excellent vid. Looking forward of more of these.
    The mushrooms remind me of frank gallagher

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      mukund srinivas cheers mate, not sure about the frank gallagher thing hehe

    • @mukundsrinivas8426
      @mukundsrinivas8426 9 років тому

      Haha. Frank loves mushrooms ain't it. But yea man, great video

  • @yethinderragav
    @yethinderragav 6 років тому

    Awsm vid!

  • @gristlevonraben
    @gristlevonraben 9 років тому

    it was extremely educational, thank you very much.

  • @iluzyon1
    @iluzyon1 9 років тому

    I realise iwas missing some point about the dinamic of the joule thief... Thanks for sharing these infos. And thanks to Robert for leting you in ;)

    • @AshleyMillsTube
      @AshleyMillsTube 9 років тому

      iluzyon1 hehe, cheers man, glad you found it useful ;)

    • @ThinkingandTinkering
      @ThinkingandTinkering  9 років тому +1

      iluzyon1 Ash is a star mate - it's good to have him around - you should be in the lab - some of the ideas we come up with while chatting to each other is just amazing

    • @TheJaCaMo1
      @TheJaCaMo1 9 років тому

      Robert Murray-Smith I think this may be the start of something beautiful...

    • @ThinkingandTinkering
      @ThinkingandTinkering  9 років тому

      Jacques Reynaud absolutely lol

  • @officialdiadonacs
    @officialdiadonacs Рік тому

    How's Ashton doing? You ever check in with him and his family?

  • @DonaldSleightholme
    @DonaldSleightholme 6 років тому

    could you try replacing the battery on joule thief with Tritium powered solar technology if that works then the led should stay powered for 12years or until a component failed 🤔🙄

  • @pauls7755
    @pauls7755 8 років тому

    I dont know much about electronics - but this was clear and REALLY interesting. When you say that you can power a 3V device usiing just 1.5V of energy I Initially I thought "OMG free energy!" But then thought of the First Law of Thermodynamics - cant create something out of nothing.
    But what you are really doing is just making it more efficient ? Just wondering how this effects the overall life of the battery ?
    Anyway, REALLY well explained - I hope you go on to make other videos. Cheers!

    • @ThinkingandTinkering
      @ThinkingandTinkering  8 років тому

      there's no free energy here mate - you are right it is just an efficiency and depth of discharge thing - i have no idea on cycle life as i have never tested it - but that would be worth doing

  • @ArbitraryOnslaught
    @ArbitraryOnslaught 6 років тому

    More then decent explanation!

  • @alphonseprecis2302
    @alphonseprecis2302 7 років тому

    13:30 did you just crawl from under a car you're repairing next door? Even academics can afford a comb, a bit of soap, a clean T-shirt and a less scruffy sweater

  • @shaunlastname391
    @shaunlastname391 3 роки тому

    Could've spent the 16 minutes walking to a shop and buying this magic for a pound in a cheap torch ffs. An led driver wow
    This guy needs to have a word with his mushroom pals, they're taking the piss out of him

  • @weareelectricgi
    @weareelectricgi 4 роки тому

    very well explained

  • @FongangDassiJean
    @FongangDassiJean 9 років тому +1

    Incredible! magloire mag , try to reproduce this and let me know what you think.