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Joule Thief Battery Charger

Joule Thief Battery Charger

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38 Comments

  1. zenol leytan

    July 11, 2019 at 5:49 am

    is there a limit on the voltage input and voltage load? or does this basically double the voltage of anything going through it?

  2. Donald Smith

    July 11, 2019 at 5:49 am

    The cap after the diode isn't needed. In fact some think that a high frequency changing a battery helps batteries that are getting where they don't want to take a chance anymore because it can clean the surface of the inside parts, but I have not done any tests

  3. Pacero

    July 11, 2019 at 5:49 am

    Nice circuit,but we want to see the numbers of the variables. Time, voltage, amps, an so on.

  4. Bill Kerr

    July 11, 2019 at 5:49 am

    Instead of winding a coil you can use a pair of through-hole or surface mount inductors (look like resistors) & dirt cheap, For even smaller size and better control you can use a dedicated boost converter chip, no transistor, and just one inductor since it will pulse by itself. Look inside a cheap solar powered garden light to see how this is done.

  5. Unique Unique

    July 11, 2019 at 5:49 am

  6. pradeep baurai

    July 11, 2019 at 5:49 am

    what function do capacitors play in that circuit?

  7. Johnny 662

    July 11, 2019 at 5:49 am

    Good Day!. what is the size of the wire that you have used;gauge

  8. HowTo DIY homeMade Electronica

    July 11, 2019 at 5:49 am

    How many amp does it produce cause it should produce at least 300 mA or more in order to charge a battery

  9. Edimar Salles

    July 11, 2019 at 5:49 am

    Material list?

  10. masbro sis

    July 11, 2019 at 5:49 am

    gan rangkaian sederhana tanpa baterai output 3volt gmn gan?

  11. Vinay S L

    July 11, 2019 at 5:49 am

    will it amplify current?

  12. travis moore

    July 11, 2019 at 5:49 am

    Is that similar to a boost DC-DC converter?

  13. Pablo Pazos

    July 11, 2019 at 5:49 am

    what is the output voltage? there is no measuring with the device working 🙁

  14. Dustin Smith

    July 11, 2019 at 5:49 am

    Why are we not powering the world by hamsters?!

  15. JOSIP Žlk

    July 11, 2019 at 5:49 am

    zener is backwards

  16. Neeta Patel

    July 11, 2019 at 5:49 am

    bro plz make a new vidio like creaction channel plz first tell the name of materials which u have used and then the final diagram u have made

  17. Neeta Patel

    July 11, 2019 at 5:49 am

    bro write the name of second transitor

  18. mrmola

    July 11, 2019 at 5:49 am

    This sounds stupid but….. Couldn't you use a dead rechargeable battery to charge another dead one and than they switch places, two fully charged ones from 2 dead ones?

  19. Andrew Farley

    July 11, 2019 at 5:49 am

    I have a small array of solar cells that produce around 2.5 v max. I want to be able to charge either a phone or battery bank, both of which draw 1A and 5v. Is there anyway this is possible as i built the circuit but my output voltage drops to basically 0v when the phone or power bank is hooked up. (It produces around 7V when nothing is hooked up to the output.)

  20. KevsoldLandy

    July 11, 2019 at 5:49 am

    Please!!!! The word is soldering! There is an 'l' in there. It is not performing buggery on the circuit, you do not 'sodder' it.

  21. Ralph Hernandez

    July 11, 2019 at 5:49 am

    Hi, What type of cap did you use for C-2 your output and what type of rectifier diode D-2 . I am going to attempt doing this of the glass of a USB plasma ball. I know it sounds crazy and I am sure a lot of people would ask me why do I want to do that, but I have found that there is a lot of power coming from the glass of a USB plasma ball and just for fun I want to find different ways to turn it into usable energy. I am sure that I will have to rectify the imput some since the 20 KHz frequency coming from the glass is like a very strong radio signal but like I said fun. I will share back on my results. Thank you.

  22. realflow100

    July 11, 2019 at 5:49 am

    hook a joule thief to a speaker… any sound you make in the room at all will light an LED fully… lol.. use a capacitor to build up a charge on the output to help light an LED better.. Pretty close to free energy but technically not free. as the dust particles and air moving around in the room will make tiny vibrations touching the speaker. causing the tiniest voltage to be created..

  23. music king

    July 11, 2019 at 5:49 am

    Hey , its great I thought about this project why not use a single AA battery to charge the two AA batteries . and then use the recharged battery to again recharge the battery. Sorry if I am wrong feel free to answer.

  24. The Best Stooge

    July 11, 2019 at 5:49 am

    Joule thief is so energy inefficient though. 🙁 Works but not very efficiently.

  25. MrEunderhill

    July 11, 2019 at 5:49 am

    I remember seeing a circuit like this in an electronics book years ago back before the internet was around. The main difference was a transformer was used to step up the oscillated DC voltage and then ran through a bridge rectifier.

  26. Girish Nimje

    July 11, 2019 at 5:49 am

    Make what u have done is right i love it
    but i think the schematic circuit u provided is wrong i have tried a lot but it does not work out for me n i did not get what the two dots mean near torroid

  27. Girish Nimje

    July 11, 2019 at 5:49 am

    what does the two dots near torroid reresent kindly help me i am in trouble

  28. Rosso's Repairs

    July 11, 2019 at 5:49 am

    could i replace the one 330uf cap with a parallel set up of 2 330uf 200v caps

  29. TechCorp49

    July 11, 2019 at 5:49 am

    Higher voltage but too slow to charge because of low current

  30. kokoilie

    July 11, 2019 at 5:49 am

    In the before schematic shouldn't the 1k resistor be between the transistor and toroid instead of being up there, or it doesn't matter as long as it's in-line with them?

  31. hentai nat

    July 11, 2019 at 5:49 am

    watch afrotechmods vid on voltage booster its more efficient

  32. RetroWeld

    July 11, 2019 at 5:49 am

    Love it.

  33. Alfred Jensen

    July 11, 2019 at 5:49 am

    Proof that anybody can publish anything on the internet, even if it is bullshit and mislead a bunch of people…
    PEOPLE PLEASE go back to reading books…

  34. vibe3d

    July 11, 2019 at 5:49 am

    The hamster can spin the wheel in either direction so shouldn't there be a rectifier there?

  35. jpalm32

    July 11, 2019 at 5:49 am

    Did Al Gore approve this?

  36. Paweł Pleskaczyński

    July 11, 2019 at 5:49 am

    haha hamster xd

  37. Eric Laws

    July 11, 2019 at 5:49 am

    link on makezine is down?

  38. Sergio Mendoza Rodríguez

    July 11, 2019 at 5:49 am

    @Rodrigo Garduño 

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