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World's Smallest Torch

Discussion in 'General Electronics Discussion' started by Raven Luni, Mar 3, 2013.

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  1. Raven Luni

    Raven Luni

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    Oct 15, 2011
    Got one of my mad notions and decided to make this. I originally wanted to just stick a bunch of surface mount components together but that ended badly. I'd like to get it small enough to fit into a ring - that would be cool :)

    [​IMG]
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    I'd say that depends on the size of the ring. You may be able to get the electronics small enough, But I doubt you'll find such a small yet powerful energy source aka battery.
     
  3. ElectronicsPani

    ElectronicsPani

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    Mar 3, 2013
    I guess currently making a super small Torch is not possible , We can make it small but nor super small.

    I hope it will be possible with new inventions like graphene supercapacitor battery.
     
  4. Raven Luni

    Raven Luni

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    Oct 15, 2011
    Its basically a joule thief powered by a coin cell. There's no reason that wont last a reasonable amount of time.
     
  5. shrtrnd

    shrtrnd

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    Jan 15, 2010
    Contact 'Q', He's probably in Scotland now, waiting for the next James Bond movie.
    Why reinvent the wheel.
     
  6. Raven Luni

    Raven Luni

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    Oct 15, 2011
    Not reinventing anything, just messing around :)
    I can see kids and some of my arty friends wanting these though. I'll get some double sided board for my next attempt and see how much I can shave off my ferrite beads (smallest I have is 5mmx8mm) then try making some clear resin rings. I also have QTC pills so it turns on with a squeeze :)
     
  7. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    You could try finding a ferrite bead that makes for the ring itself. Bigger, not smaller.
     
  8. Raven Luni

    Raven Luni

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    Oct 15, 2011
    Thats a good idea :)
     
  9. BobK

    BobK

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    Jan 5, 2010
    I love it. Ferrite Joule Thief rings. This could be a killer product! Can you get ferrite in fashion colors?

    Of course, this could turn some jewel thieves into Joule Thief thieves.

    Bob
     
    Last edited: Mar 4, 2013
  10. Raven Luni

    Raven Luni

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    Oct 15, 2011
    As it happens I have the perfect thing - found some adhesive backed ferrite strip stuff I got ages ago (for sticking on the wall and putting magnets on) - just need to cut some suitably sized strips and loop - custom fit :)

    As for colours, the whole thing will be encased in a resin mold anyway with a hole in the back for the battery) , so thats where the colours go or can be clear for that visible bits effect.
     
  11. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    What about using a hematite ring? Granted, ferrite may be better, but hematite rings are cheap.
     
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